69 results on '"Nitin Muralidharan"'
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2. The Role of Isostatic Pressing in Large-Scale Production of Solid-State Batteries
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Marm Dixit, Chad Beamer, Ruhul Amin, James Shipley, Richard Eklund, Nitin Muralidharan, Lisa Lindqvist, Anton Fritz, Rachid Essehli, Mahalingam Balasubramanian, and Ilias Belharouak
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Fuel Technology ,Renewable Energy, Sustainability and the Environment ,Chemistry (miscellaneous) ,Materials Chemistry ,Energy Engineering and Power Technology - Published
- 2022
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3. Next‐Generation Cobalt‐Free Cathodes – A Prospective Solution to the Battery Industry's Cobalt Problem*
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Nitin Muralidharan, Ethan C. Self, Jagjit Nanda, and Ilias Belharouak
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- 2022
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4. Electrochemical energy storage systems
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Marm Dixit, Nitin Muralidharan, Anand Parejiya, Rachid Essehli, Ilias Belharouak, and Ruhul Amin
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- 2023
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5. List of contributors
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Emmanuel Ackom, Mohsen Alizadeh Bidgoli, Ruhul Amin, Syed Muhammad Amrr, M.S. Jamil Asghar, Mohammad Ashiq, Y.A.O. Assagra, Ammar Atif, Ayhan Atiz, Muhammad Aziz, Ilias Belharouak, Madhushri Bhar, A. Bharadwaj, Udita Bhattacharjee, Bentang Arief Budiman, J.P. Carmo, Viplov Chauhan, Bowen Chen, Mohammadhossein Deihimi, Marm Dixit, Z.Y. Dong, Mamdouh El Haj Assad, Mustafa Erden, Rachid Essehli, Mehrdad Gholami, Shuvajit Ghosh, L.M. Gonçalves, Manoj Goswami, R.H. Gounella, Amin Hajizadeh, Siamak Hoseinzadeh, Metha Islameka, Trapti Jain, Satyaranjan Jena, Firman Bagja Juangsa, Hatice Karakilcik, Mehmet Karakilcik, Muhammad Khalid, Khalid Abdullah Khan, Nayan Kumar, Satendra Kumar, Surender Kumar, Chun Sing Lai, Giorgio Locatelli, S. Maiti, Surendra Kumar Martha, Nitin Muralidharan, Venkataramana Naik N, Ankireddy Narendra, Anup Kumar Panda, Anand Parejiya, null Prabhansu, E.S.N. Raju P, Navid Rezaei, Madan Mohan Sahu, Pradeep Kumar Sahu, Abdelaziz Salah Saidi, Saygin San, N. Sathish, Mohammad Hassan Shahverdian, Hafsa Siddiqui, Netrapal Singh, Rahul Singh, Ali Sohani, Hadi Tarimoradi, Sheng Xiang, Y. Xu, Yan Xu, Hongming Yang, Bangzhe Yin, Shijie Zhang, and Yongxi Zhang
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- 2023
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6. Understanding implications of cathode architecture on energy density of solid-state batteries
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Ilias Belharouak, Rachid Essehli, Nitin Muralidharan, Ruhul Amin, Anand Parejiya, and Marm B. Dixit
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Range (particle radiation) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,High voltage ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Engineering physics ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,law ,General Materials Science ,Particle size ,0210 nano-technology ,Geometric modeling - Abstract
Next generation solid-state batteries (SSB) will need to leverage high voltage cathodes, as well as metallic anodes to achieve the realistic performance targets necessary to replace liquid electrolyte-based batteries in cutting-edge applications including electric vehicles. However, limitations arising from mass and charge transports, kinetics and chemo-mechanical degradation at the electrode | electrolyte interface limit the performance of present day SSBs. Optimizing composite cathode architecture, which is an integral part of solid-state batteries, is vital to realize the high-energy density and high-performance goals for next-generation solid-state batteries. Cathode architecture needs to be optimized for high loadings of active material, well-percolated ion and electron transport pathways and increased resilience against electrochemical stresses. This paper provides a first report of framework for geometric modeling of composite cathode architectures and evaluates the impact of cathode architecture on cell-level energy density using hierarchical models. Packing around primary and secondary active material particles are simulated for a range of active material particle size and solid electrolyte size distributions in the composite cathode. Impact of packing architecture on processing parameters of a given cathode composition and thickness, as well as on achievable energy density is evaluated for a range of commonly used solid electrolyte and cathode materials. Overall, the proposed framework offers a facile exploratory methodology for establishing initial metrics for scalable processing of practical and competent SSBs.
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- 2021
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7. Differences in the Interfacial Mechanical Properties of Thiophosphate and Argyrodite Solid Electrolytes and Their Composites
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Marm Dixit, Nitin Muralidharan, Anand Parejiya, Charl Jafta, Zhijia Du, Sabine M. Neumayer, Rachid Essehli, Ruhul Amin, Mahalingam Balasubramanian, and Ilias Belharouak
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General Materials Science - Abstract
Interfacial mechanics are a significant contributor to the performance and degradation of solid-state batteries. Spatially resolved measurements of interfacial properties are extremely important to effectively model and understand the electrochemical behavior. Herein, we report the interfacial properties of thiophosphate (Li
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- 2022
8. Enabling Sustainable Lithium-Ion Battery Manufacturing via Recycling
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Yaocai Bai, Nitin Muralidharan, Jagjit Nanda, and Ilias Belharouak
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- 2022
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9. Design and Performance of lithium-Ion Batteries for Achieving Electric Vehicle Takeoff, Flight, and Landing
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Ruhul, Amin, Nitin, Muralidharan, Marm, Dixit, Anand, Parejiya, Rachid, Essehli, and Ilias, Belharouak
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Today, the burgeoning drive towards global urbanization with over half the earth’s population living in cities, has created major challenges with regards to intracity and intercity transit and mobility. This problem is compounded due to the fact that almost always urbanization and increase in standard of living drives individual automobile ownerships. Over 95% of automobiles are presently powered by some form of fossil fuel and as an unintended consequence, urban centers have also been centers for peak greenhouse gas emissions, a major contributor to global climate change. A revolutionary solution to this conundrum is flight capable electric automobiles or electric aerial vehicles that can tackle both urban mobility and climate change challenges. For such advanced electric platforms, energy storage and delivery component is the vital component towards achieving takeoff, flight, cruise, and landing. The requirements and duty cycle demands on the energy storage system is drastically different when compared to the performance metrics required for terrestrial electric vehicles. As the widely deployed lithium ion-based battery systems are often the primary go-to energy storage choice in electric vehicle related applications, it is imperative that performance metrics and specifications for such batteries towards areal electric vehicles need to be established. In this nascent field, there exists ample opportunities for battery material innovations, understanding degradation mechanism, battery design, development and deployment of battery control and management systems. Thus, this chapter comprehensively discusses battery requirements and identifies battery material chemistries suitable for handling aerial electric automobile duty cycles. The chapter also discusses the battery cell-level metrics pertaining to electrochemical, chemical, mechanical, and structural parameters. Furthermore, specific models for battery degradation, state of health (SOH), capacity and models for full cell performance and degradation are also discussed here. Finally, the chapter also discusses battery safety and future directions of batteries that would power these next generation urban electric aircrafts.
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- 2022
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10. Valuation of Surface Coatings in High-Energy Density Lithium-ion Battery Cathode Materials
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Nitin Muralidharan, Ruhul Amin, Rachid Essehli, Ilias Belharouak, and Umair Nisar
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Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Nanotechnology ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Lithium-ion battery ,Cathode ,0104 chemical sciences ,law.invention ,Surface coating ,Coating ,law ,engineering ,General Materials Science ,Wetting ,0210 nano-technology - Abstract
Artificial barriers, usually with either electrochemically active or inactive coating materials, are deployed on cathode material surfaces to mitigate detrimental side reactions by suppressing direct contact of cathode and electrolyte called surface coatings. These surface coatings are commonly known to increase the wettability of liquid electrolyte and reduce the interfacial charge transfer resistance. An important caveat is the selection of appropriate coating material with appropriate thickness for achieving enhanced electrochemical performance. As modern battery materials are increasingly developed with some type of surface coating, a careful and thorough examination of their role in mitigating the cycle life issues of cathode materials is paramount. This comprehensive review article extensively covers the selection criteria of coating materials based on their chemical and physical properties and electrochemical functionalities. Additionally, the article discusses the concept of critical coating thickness and methods of achieving homogeneous coating architectures that deliver desired performance benefits. Furthermore, this comprehensive article summarizes the recent advancements, effectiveness, necessity of cathode surface coatings and identifies the key aspect of structure-property correlation between coating type/thickness and lithium-ion diffusion through coating layers as the linchpin that validates surface coating approaches especially for high capacity nickel-rich cathodes.
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- 2021
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11. Na1+xMnx/2Zr2–x/2(PO4)3 as a Li+ and Na+ Super Ion Conductor for Solid-State Batteries
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Rachid Essehli, Nitin Muralidharan, Harry M. Meyer, Jue Liu, David L. Wood, Ruhul Amin, Ilias Belharouak, and Anand Parejiya
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Materials science ,Renewable Energy, Sustainability and the Environment ,Analytical chemistry ,Solid-state ,Energy Engineering and Power Technology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal conduction ,01 natural sciences ,0104 chemical sciences ,Ion ,Conductor ,Fuel Technology ,Chemistry (miscellaneous) ,Materials Chemistry ,Fast ion conductor ,0210 nano-technology - Abstract
Here we report dual ion conduction capability of Na-based NASICON type super ion conductor materials using Na1+xMnx/2Zr2–x/2(PO4)3 (NMZP) as a candidate system. This method enables the use of Na-ba...
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- 2021
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12. Implications of Local Cathode Structure in Solid-State Batteries
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Marm Dixit, Ruhul Amin, Anand Parejiya, Nitin Muralidharan, Rachid Essehli, and Ilias Belharouak
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- 2022
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13. Energy and environmental aspects in recycling lithium-ion batteries: Concept of Battery Identity Global Passport
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Nitin Muralidharan, Stefano Passerini, Ilias Belharouak, M. Stanley Whittingham, Yang-Kook Sun, and Yaocai Bai
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metallic nanocrystals ,Battery recycling ,Mechanical Engineering ,02 engineering and technology ,Environmental economics ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Key issues ,renewable energy ,01 natural sciences ,two-dimensional ,electrocatalysis ,0104 chemical sciences ,Incentive ,Hardware_GENERAL ,Mechanics of Materials ,Dominance (economics) ,General Materials Science ,Electronics ,0210 nano-technology ,Renewable energy storage - Abstract
The emergence and dominance of lithium-ion batteries in expanding markets such as consumer electronics, electric vehicles, and renewable energy storage are driving enormous interests and investments in the battery sector. The explosively growing demand is generating a huge number of spent lithium-ion batteries, thereby urging the development of cost-effective and environmentally sustainable recycling technologies to manage end-of-life batteries. Currently, the recycling of end-of-life batteries is still in its infancy, with many fundamental and technological hurdles to overcome. Here, the authors provide an overview of the current state of battery recycling by outlining and evaluating the incentives, key issues, and recycling strategies. The authors highlight a direct recycling strategy through discussion of its benefits, processes, and challenges. Perspectives on the future energy and environmental science of this important field is also discussed with respect to a new concept introduced as the Battery Identity Global Passport (BIGP).
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- 2020
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14. Sustainable Direct Recycling of Lithium‐Ion Batteries via Solvent Recovery of Electrode Materials
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Yaocai Bai, Ilias Belharouak, Rachid Essehli, Jianlin Li, and Nitin Muralidharan
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Electrode material ,Materials science ,General Chemical Engineering ,chemistry.chemical_element ,Ion ,Solvent ,chemistry.chemical_compound ,General Energy ,chemistry ,Chemical engineering ,Environmental Chemistry ,General Materials Science ,Lithium ,Ethylene glycol - Published
- 2020
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15. Iron-Doped Sodium Vanadium Oxyflurophosphate Cathodes for Sodium-Ion Batteries—Electrochemical Characterization and In Situ Measurements of Heat Generation
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Nitin Muralidharan, Ruhul Amin, Ramesh Kumar Petla, Rachid Essehli, Abdelfattah Mahmoud, Ali Abouimrane, Ilias Belharouak, Kenza Maher, and Hamdi Ben Yahia
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0301 basic medicine ,Battery (electricity) ,Materials science ,Sodium ,chemistry.chemical_element ,Electrolyte ,Thermal diffusivity ,Electrochemistry ,Cathode ,Anode ,law.invention ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,chemistry ,Chemical engineering ,law ,Heat generation ,General Materials Science ,030217 neurology & neurosurgery - Abstract
Sodium-ion batteries (NaIBs) are increasingly being envisioned for grid-scale energy-storage systems because of cost advantages. However, implementation of this vision has been challenged by the low-energy densities delivered by most NaIB cathodes. Toward addressing this challenge, the authors report the synthesis and characterization of a new iron-doped Na3Fe0.3V1.7O(PO4)2F2 cathode using a novel facile hydrothermal route. The synthesized material was characterized using scanning electron microscopy, X-ray diffraction, and Mossbauer spectroscopy techniques. The obtained discharge capacity in the half-cell configuration lies from 119 to 125 to 130 mA h/g at C/10 while tested using three different electrolyte formulations, dimethyl carbonate-ethylene carbonate (EC)-propylene carbonate (PC), diethyl carbonate-EC, and EC-PC, respectively. The synthesized cathodes were also evaluated in full-cell configurations, which delivered an initial discharge capacity of 80 mA h/g with NaTi2(PO4)3MWCNT as the anode. Ionic diffusivity and interfacial charge transfer kinetics were also evaluated as a function of temperature and sodium concentration, which revealed that electrochemical rate performances in this material were limited by charge-transfer kinetics. To understand the heat generation mechanism of the Na/Na3Fe0.3V1.7O(PO4)2F2 half-cell during charge and discharge processes, an electrochemical isothermal calorimetry measurement was carried out at different current rates for two different temperatures (25 and 45 °C). The results showed that the amount of heat generated was strongly affected by the operating charge/discharge state, C-rate, and temperature. Overall, this work provides a new synthesis route for the development of iron-doped Na3Fe0.3V1.7O(PO4)2F2-based high-performance sodium cathode materials aimed at providing a viable pathway for the development and deployment of large-scale energy-storage based on sodium battery systems.
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- 2020
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16. Perspectives on the relationship between materials chemistry and roll-to-roll electrode manufacturing for high-energy lithium-ion batteries
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Kevin A. Hays, Nitin Muralidharan, Rose E. Ruther, Chengyu Mao, David L. Wood, Zhijia Du, Linxiao Geng, Jianlin Li, Marissa Wood, and Ilias Belharouak
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Solid-state chemistry ,Materials science ,Renewable Energy, Sustainability and the Environment ,Nuclear engineering ,Energy Engineering and Power Technology ,02 engineering and technology ,Oak Ridge National Laboratory ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Anode ,Roll-to-roll processing ,Coating ,law ,Electrode ,engineering ,Slurry ,General Materials Science ,0210 nano-technology - Abstract
As lithium-ion battery (LIB) active material and cell manufacturing costs continue to drop with wider adoption of electric vehicles, electrode and cell processing costs remain too high in terms of reaching the ultimate U.S. Department of Energy (DOE) cell cost target of $80/kWh. This paper primarily covers major materials chemistry advancements made over the last 10 years at Oak Ridge National Laboratory (ORNL) in the space of advanced manufacturing science for LIBs with the aim of simultaneously meeting the ultimate cost target, 500 Wh/kg gravimetric energy density, 10-15-min fast charge times, and 1000 deep discharge cycles. Aqueous electrode processing with a variety of active anode and cathode materials is now a standard procedure at the DOE Battery Manufacturing R&D Facility at ORNL (BMF), including the latest processes developed for Ni-rich cathodes. New results on cobalt-free LiNi0.8Fe0.1Al0.1O2 (NFA 811) are also included and discussed in an electrode processing advantage context. In addition, colloidal processing advancements have been made for Si/C composite anodes for achieving >600 mA h/g capacities. Optimization of electrode coating parameters and drying protocols have been completed, which has elucidated how key processing variables need to be changed when parameters such as slurry solids loading, solvent type, and wet electrode thickness are changed. ORNL has also increased the line speeds at which thick cathodes can be processed using ultra-fast electron beam (EB) curing and substantially decreased formation cycling times to
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- 2020
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17. Eutectic Synthesis of the P2-Type NaxFe1/2Mn1/2O2 Cathode with Improved Cell Design for Sodium-Ion Batteries
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Mengya Li, Charl J. Jafta, Nitin Muralidharan, Ilias Belharouak, Jianlin Li, Ruhul Amin, Rachid Essehli, David L. Wood, and Yaocai Bai
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Materials science ,Oxide ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal diffusivity ,Electrochemistry ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Anode ,Crystallinity ,chemistry.chemical_compound ,Chemical engineering ,chemistry ,law ,Yield (chemistry) ,General Materials Science ,0210 nano-technology ,Eutectic system - Abstract
An engaging area of research in sodium-ion batteries (SIBs) has been focusing on discovery, design, and synthesis of high-capacity cathode materials in order to boost energy density to levels close enough to that of state-of-the-art lithium-ion batteries. Of particular interest, P2-type layered oxide, Na2/3Fe1/2Mn1/2O2, has been researched as a potential cathode in SIBs based on its high theoretical capacity of 260 mA h/g and use of noncritical materials. However, the reported synthesis methods are not only complex and energy-demanding but also often yield inhomogeneous and impure materials with capacities less than 200 mA h/g under impractical test conditions. Here, we report a novel synthesis route using low-temperature eutectic reaction to produce highly homogeneous, crystalline, and impurity-free P2-NaxFe1/2Mn1/2O2 with enhanced Na-ion diffusivity and kinetics. The overall electrochemical performances of the Na-ion cells have been improved by pairing the P2-cathode with presodiated hard carbon anodes, leading to reversible capacities in the range of 180 mA h/g. This new approach is a contribution toward the simplification of synthesis and scalability of sodium-based cathodes with high crystallinity and fine-tuned morphology and the realization of a sodium-ion battery system with lower cost and improved electrochemical performance.
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- 2020
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18. Current Status and Prospects of Solid-State Batteries as the Future of Energy Storage
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Rachid Essehli, Nitin Muralidharan, Marm B. Dixit, Anand Parejiya, Ilias Belharouak, and Ruhul Amin
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Solid-state ,Environmental science ,02 engineering and technology ,Current (fluid) ,010402 general chemistry ,021001 nanoscience & nanotechnology ,0210 nano-technology ,01 natural sciences ,Engineering physics ,Energy storage ,0104 chemical sciences - Abstract
Solid-state battery (SSB) is the new avenue for achieving safe and high energy density energy storage in both conventional but also niche applications. Such batteries employ a solid electrolyte unlike the modern-day liquid electrolyte-based lithium-ion batteries and thus facilitate the use of high-capacity lithium metal anodes thereby achieving high energy densities. Despite this promise, practical realization and commercial adoption of solid-state batteries remain a challenge due to the underlying material and cell level issues that needs to be overcome. This chapter thus covers the specific challenges, design principles and performance improvement strategies pertaining to the cathode, solid electrolyte and anode used in solid state batteries. Perspectives and outlook on specific applications that can benefit from the successful implementation of solid-state battery systems are also discussed. Overall, this chapter highlights the potential of solid-state batteries for successful commercial deployment in next generation energy storage systems.
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- 2022
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19. Ultrasonic nondestructive diagnosis of lithium-ion batteries with multiple frequencies
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Hongbin Sun, Nitin Muralidharan, Ruhul Amin, Vivek Rathod, Pradeep Ramuhalli, and Ilias Belharouak
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Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Published
- 2022
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20. Dual Ion Conducting Solid Electrolyte and Electrochemical Protocol for Interface Design
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Ruhul Amin, Marm Dixit, Anand Parejiya, Rachid Essehli, Nitin Muralidharan, and Ilias Belharouak
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The major challenges for the development of all solid-state batteries (ASSBs), that would be cheaper and can be charged and discharged faster, are stable solid electrolytes and robust interfacial design. We report the dual ion conduction capability of Na-based NASICON type super ion conductor materials using Na1+xMnx/2Zr2-x/2(PO4)3 (NMZP) as a candidate system [1]. This method enables the use of Na-based NASICON material family in both Na as well as Li all solid-state batteries (Figure 1a). The ionic conductivity NZMPs increased as the x value increased and x = 2 showed the highest room temperature conductivities. Crystallographic analysis using neutron diffraction revealed that conductivities observed in these materials are related to the variations in the Na-O bond length and the concentration of mobile sodium content. Using Galvano static plating and stripping tests, we show that these NMZPs boast good cycling stability against both Na and Li metals which also reveals dual ion conduction. Mechanistic investigations through postmortem SEM/EDS and XPS characterizations of the alkali metal and the cycled NMZPs confirm that the Na-Li ion exchange occurs readily in these materials when electrochemically cycled. ASSBs have several interfaces and the interface properties vary depending on the contact condition, energy states, type defects, and chemical/electrochemical stability. ASSB life and performance rely largely on these interfaces since dendrite formation, Li-depleted space-charge layer generation, and spatial variation in interfacial adhesion originate at the interfaces, which leads to battery failure. Stabilizing Li | SE interface is crucial for the development of high-energy-density solid-state batteries. Current approaches in Li metal stabilization employ energy and cost-intensive protocols that have a detrimental impact on the techno-economic feasibility of the ASSBs. This presentation will focus on the facile, electrochemical protocol for improving the interfacial impedance and contact at the Li | Li6.25Al0.25La3Zr2O12 (LALZO) interface. Implementation of a fraction of second short duration high voltage pulse to a poorly formed interface leads to a sustained improvement in contact impedance and lower overpotentials for electrodeposition and electro-dissolution [2] (Figure 1b). This high pulse protocol does not induce the formation of dendrites on the symmetric cells. This electrochemical protocol has direct application in battery formation cycles as well as online management systems for ASSBs. Reference [1]. A. Parejiya, R. Essehli, R. Amin, J. Liu, N. Muralidharan, H. M. Meyer, III, D. L. Wood, III, and I. Belharouak, ACS Energy Letters 6 (2021) 429. [2]. A. Parejiya, R. Amin, M.B. Dixit, R. Essehli, C. Jafta, D.L. Wood, and I. Belharouak., ACS Energy Lett. 6 (2021) 3669. Figure 1
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- 2022
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21. (Invited) Pathways Towards Practical Solid-State Batteries
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Ilias Belharouak, Marm Dixit, Ruhul Amin, Anand Parejiya, Rachid Essehli, and Nitin Muralidharan
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Solid-state batteries are pivotal technologies for next-generation energy storage needs. However, they are plagued with various challenges from materials and interfaces all the way out to integration into devices. Herein, we discuss several new pathways that our team has evaluated to drive the research towards practical solid-state batteries. Initially, we highlight SolidPAC, which is an interactive experimental toolkit developed at Oak Ridge National Laboratory to enable the design of a solid-state battery for user-specified application requirements. The toolkit is flexible enough to assist the battery community in quantifying the impact of materials chemistry and fractions, electrode thicknesses and loadings, and electron flows on cell energy density and cost. The toolkit allows users to assess and extrapolate the impact of battery design and choice of cell components on cell-level energy density of a solid-state battery. Subsequently, we will discuss some key experimental strategies that leverage cheap and scalable electrochemical approaches towards the integration and on-line management of solid-state batteries. Specifically, these approaches are aimed to alleviate high interfacial resistances typically observed in some SSB configurations as well as to mitigate the growth of filaments within the solid electrolyte.
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- 2022
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22. Understanding and Evaluating the Design Space for Practical Solid-State Batteries
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Marm Dixit, Ruhul Amin, Anand Parejiya, Rachid Essehli, Nitin Muralidharan, and Ilias Belharouak
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Solid-state batteries are promising alternatives for high-energy and -power-density rechargeable battery applications. It is vital to design and engineer SSB cells that can compete and improve on the current Li-ion battery counterparts. However, limited approaches exist today to assess and extrapolate the impact of battery designs and choices of cell components on the cell-level energy density of a solid-state battery. Herein, we introduce the Solid-State Battery Performance Analyzer and Calculator (SolidPAC), an interactive experimental toolkit to enable the design of a solid-state battery for user-specified application requirements. The toolkit is flexible enough to assist the battery community in quantifying the impact of materials chemistry and fractions, electrode thicknesses and loadings, and electron flows on cell energy density and costs and in utilizing inverse engineering concepts to correlate the cell energy density output to materials and cell design inputs. In addition to this, we will discuss a geometric modeling of composite cathode architectures to assess its impact on cell-level energy densities. Impact of packing architecture on processing parameters of a given cathode composition and thickness, as well as on achievable energy density is evaluated for a range of commonly used solid electrolyte and cathode materials. Overall, the proposed framework offers a facile exploratory methodology for establishing initial metrics for scalable processing of practical and competent SSBs.
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- 2022
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23. Hydrothermal synthesis of Co-free NMA cathodes for high performance Li-ion batteries
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Rachid Essehli, Anand Parejiya, Nitin Muralidharan, Charl J. Jafta, Ruhul Amin, Marm B. Dixit, Yaocai Bai, Jue Liu, and Ilias Belharouak
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Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Published
- 2022
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24. Hollow Silica Particles: A Novel Strategy for Cost Reduction
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Georgios Polizos, Nitin Muralidharan, Jaswinder Sharma, David A. Cullen, and Daron Spence
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Piping ,Materials science ,carbon black ,business.industry ,General Chemical Engineering ,chemistry.chemical_element ,Carbon black ,hollow particles ,Article ,Chemistry ,Thermal conductivity ,chemistry ,Thermal insulation ,silica ,thermal insulation ,General Materials Science ,Infrared heater ,Current (fluid) ,Cryogenic fuel ,Composite material ,business ,QD1-999 ,Carbon ,energy - Abstract
Thermal insulation materials are highly sought after for applications such as building envelopes, refrigerators, cryogenic fuel storage chambers, and water supply piping. However, current insulation materials either do not provide sufficient insulation or are costly. A new class of insulation materials, hollow silica particles, has attracted tremendous attention due to its potential to provide a very high degree of thermal insulation. However, current synthesis strategies provide hollow silica particles at very low yields and at high cost, thus, making the particles unsuitable for real-world applications. In the present work, a synthesis process that produces hollow silica particles at very high yields and at a lower cost is presented. The effect of an infrared heat absorber, carbon black, on the thermal conductivity of hollow silica particles is also investigated and it is inferred that a carbon black–hollow silica particle mixture can be a better insulating material than hollow silica particles alone.
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- 2021
25. Eutectic Synthesis of the P2-Type Na
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Mengya, Li, David L, Wood, Yaocai, Bai, Rachid, Essehli, Md Ruhul, Amin, Charl, Jafta, Nitin, Muralidharan, Jianlin, Li, and Ilias, Belharouak
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An engaging area of research in sodium-ion batteries (SIBs) has been focusing on discovery, design, and synthesis of high-capacity cathode materials in order to boost energy density to levels close enough to that of state-of-the-art lithium-ion batteries. Of particular interest, P2-type layered oxide, Na
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- 2020
26. Lithium Iron Aluminum Nickelate, LiNi
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Nitin, Muralidharan, Rachid, Essehli, Raphael P, Hermann, Ruhul, Amin, Charl, Jafta, Junjie, Zhang, Jue, Liu, Zhijia, Du, Harry M, Meyer, Ethan, Self, Jagjit, Nanda, and Ilias, Belharouak
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In recent years, cobalt has become a critical constraint on the supply chain of the Li-ion battery industry. With the ever-increasing projections for electric vehicles, the dependency of current Li-ion batteries on the ever-fluctuating cobalt prices poses serious environmental and sustainability issues. To address these challenges, a new class of cobalt-free materials with general formula of LiNi
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- 2020
27. Hybrid hollow silica particles: synthesis and comparison of properties with pristine particles
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Hsin Wang, Kashif Nawaz, Georgios Polizos, David Barton Smith, Jaswinder Sharma, Nitin Muralidharan, and David A. Cullen
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Battery (electricity) ,Materials science ,business.industry ,General Chemical Engineering ,Shell (structure) ,General Chemistry ,respiratory system ,Cathode ,law.invention ,Catalysis ,Chemical engineering ,law ,Thermal insulation ,Thermal ,Drug delivery ,Electron microscope ,business - Abstract
In the past decade, interest in hollow silica particles has grown tremendously because of their applications in diverse fields such as thermal insulation, drug delivery, battery cathodes, catalysis, and functional coatings. Herein, we demonstrate a strategy to synthesize hybrid hollow silica particles having shells made of either polymer-silica or carbon–silica. Hybrid shells were characterized using electron microscopy. The effect of hybrid shell type on particle properties such as thermal and moisture absorption was also investigated.
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- 2020
28. SolidPAC is an interactive battery-on-demand energy density estimator for solid-state batteries
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Marm Dixit, Anand Parejiya, Rachid Essehli, Nitin Muralidharan, Shomaz Ul Haq, Ruhul Amin, and Ilias Belharouak
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estimator ,model ,General Energy ,software ,Physics ,QC1-999 ,General Engineering ,solid-state batteries ,toolkit ,General Physics and Astronomy ,General Materials Science ,General Chemistry ,energy density - Abstract
Summary: Solid-state batteries hold the promise to be highly impactful next-generation technologies for high-energy and -power-density rechargeable battery applications. It is crucial to identify the metrics that an emerging battery technology should fulfill to achieve parity with conventional Li-ion batteries, primarily in terms of energy density. However, limited approaches exist today to assess and extrapolate the impact of battery designs and choices of cell components on the cell-level energy density of a solid-state battery. Herein, we introduce the Solid-State Battery Performance Analyzer and Calculator (SolidPAC), an interactive experimental toolkit to enable the design of a solid-state battery for user-specified application requirements. The toolkit is flexible enough to assist the battery community in quantifying the impact of materials chemistry and fractions, electrode thicknesses and loadings, and electron flows on cell energy density and costs and in utilizing inverse engineering concepts to correlate the cell energy density output to materials and cell design inputs.
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- 2022
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29. Next‐Generation Cobalt‐Free Cathodes – A Prospective Solution to the Battery Industry's Cobalt Problem
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Nitin Muralidharan, Ethan C. Self, Marm Dixit, Zhijia Du, Rachid Essehli, Ruhul Amin, Jagjit Nanda, and Ilias Belharouak
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Renewable Energy, Sustainability and the Environment ,General Materials Science - Published
- 2022
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30. Multifunctional Structural Ultrabattery Composite
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Eti Teblum, Chuanzhe Meng, Gilbert Daniel Nessim, Kathleen Moyer, Nitin Muralidharan, and Cary L. Pint
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Battery (electricity) ,Structural material ,Materials science ,Mechanical Engineering ,Structural system ,Composite number ,Bioengineering ,02 engineering and technology ,General Chemistry ,Carbon nanotube ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,law.invention ,law ,Ultimate tensile strength ,General Materials Science ,Composite material ,0210 nano-technology ,Elastic modulus ,UltraBattery - Abstract
Here we demonstrate a composite material exhibiting dual multifunctional properties of a structural material and a redox-active battery. This incorporates three-dimensional aligned carbon nanotube interfaces that weave together a structural frame, redox-active battery materials, and a Kevlar-infiltrated solid electrolyte that facilitates ion transfer. Relative to the total measured composite material mass, we demonstrate energy density up to ∼1.4 Wh/kg, elastic modulus of 7 GPa, and tensile strength exceeding 0.27 GPa. Mechano-electrochemical analysis demonstrates stable battery operation under mechanical loading that validates multifunctional performance. These findings demonstrate how battery materials that are normally packaged under compression can be reorganized as elements in a structurally reinforced composite material.
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- 2018
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31. Rethinking sodium-ion anodes as nucleation layers for anode-free batteries
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Keith Share, Jennifer Donohue, Cary L. Pint, Nitin Muralidharan, Thomas Metke, and Adam P. Cohn
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Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Sodium ,Nucleation ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Current collector ,010402 general chemistry ,021001 nanoscience & nanotechnology ,7. Clean energy ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Anode ,Chemical engineering ,chemistry ,law ,General Materials Science ,0210 nano-technology ,Electroplating ,Faraday efficiency - Abstract
Here we report a room-temperature sodium metal battery, where the sodium initially stored in a Na3V2(PO4)3 cathode is plated, upon charging, onto an aluminum current collector coated with a thin nucleation layer. To maximize the battery performance, conventional sodium-ion anode materials, including non-graphitized carbons and sodium-alloying metals, were evaluated as nucleation layers to facilitate stable electroplating of sodium metal. Among several materials studied, carbon black and bismuth showed the highest sodium plating–stripping coulombic efficiencies in half-cell testing, averaging 99.9% and 99.85%, respectively, over 50 cycles at 0.5 mA cm−2. Building on these findings, anode-free cells with Na3V2(PO4)3 cathodes were assembled in a discharged state, demonstrating energy densities up to 318 W h kg−1 at 0.25 mA cm−2 (∼C/6), a first-cycle coulombic efficiency up to 92%, a stable discharge voltage at 3.35 V, an average round-trip energy efficiency of 98%, and a capacity retention of 82.5% after 100 cycles at 0.5 mA cm−2 (∼C/3). With its unique performance highlighted in this work, the anode-free sodium battery emerges as a low-cost, high-performance option for stationary electric storage.
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- 2018
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32. Nanostructured ligament and fiber Al–doped Li7La3Zr2O12 scaffolds to mediate cathode-electrolyte interface chemistry
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Charl J. Jafta, Ritu Sahore, Nitin Muralidharan, David L. Wood, Jong K. Keum, Gabriel M. Veith, Alexander J. Kukay, Georgios Polizos, and Jaswinder Sharma
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Aqueous solution ,Renewable Energy, Sustainability and the Environment ,Energy Engineering and Power Technology ,Electrolyte ,Cathode ,Electrospinning ,law.invention ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Nanofiber ,Dimethylformamide ,Calcination ,Fiber ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry - Abstract
Scaffold structures of electrospun aluminum–substituted lithium lanthanum zirconate Li7La3Zr2O12 (Al-LLZO) were synthesized and used as an additive in a LiNi0.6Mn0.2Co0.2O2 composite cathode. The scaffolds were crystalized in the cubic phase after calcination at 700 °C. The Al-LLZO scaffold morphology was dependent on the precursor formulation (aqueous and dimethylformamide. The aqueous precursors resulted in scaffolds of densely coalesced ligaments, whereas the dimethylformamide precursors resulted in high–aspect ratio nanofiber scaffolds. The long-term cycling stability and rate performance of the cells were found to depend on the Al-LLZO scaffold morphology. The uniformly dispersed Al-LLZO fibers resulted in a more stable cathode electrolyte interface formation through the reduced decomposition of the LiPF6 salt during cycling, resulting in a better high-rate and long-term cycling performance.
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- 2021
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33. Electrochemical Ion Exchange in Nasicon Based Solid Electrolytes
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Nitin Muralidharan, Ruhul Amin, Ilias Belharouak, Anand Parejiya, and Rachid Essehli
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Materials science ,Ion exchange ,Inorganic chemistry ,Fast ion conductor ,Electrochemistry - Published
- 2021
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34. Recent Advances in Cobalt-Free Nickel-rich Li-ion Battery Cathode Materials for Next Generation Electric Vehicles
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Ilias Belharouak, Ruhul Amin, Rachid Essehli, and Nitin Muralidharan
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Battery (electricity) ,Nickel ,Materials science ,chemistry ,law ,Metallurgy ,chemistry.chemical_element ,Cobalt ,Cathode ,Ion ,law.invention - Published
- 2021
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35. Theoretical and Experimental Investigations into Composite Cathode Architectures for Solid-State Batteries
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Rachid Essehli, Ilias Belharouak, Nitin Muralidharan, Ruhul Amin, Anand Parejiya, and Marm B. Dixit
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Materials science ,Solid-state ,Composite cathode ,Composite material - Published
- 2021
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36. Ultralow Frequency Electrochemical–Mechanical Strain Energy Harvester Using 2D Black Phosphorus Nanosheets
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Mengya Li, Nicholas Galioto, Nitin Muralidharan, Cary L. Pint, and Rachel Carter
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Materials science ,Energy Engineering and Power Technology ,Nanotechnology ,02 engineering and technology ,Bending ,010402 general chemistry ,01 natural sciences ,Strain energy ,chemistry.chemical_compound ,Materials Chemistry ,Triboelectric effect ,Mechanical energy ,Pressing ,Renewable Energy, Sustainability and the Environment ,business.industry ,021001 nanoscience & nanotechnology ,Piezoelectricity ,0104 chemical sciences ,Phosphorene ,Fuel Technology ,chemistry ,Chemistry (miscellaneous) ,Optoelectronics ,0210 nano-technology ,business ,Efficient energy use - Abstract
Advances in piezoelectric or triboelectric materials have enabled high-frequency platforms for mechanical energy harvesting (>10 Hz); however, virtually all human motions occur below 5 Hz and therefore limits application of these harvesting platforms to human motions. Here we demonstrate a device configuration based on sodiated black phosphorus nanosheets, or phosphorene, where mechanoelectrochemical stress–voltage coupling in this material is capable of efficient energy harvesting at frequencies as low as 0.01 Hz. The harvester is tested using both bending and pressing mechanical impulses with peak power delivery of ∼42 nW/cm2 and total harvested energy of 0.203 μJ/cm2 in the bending mode and ∼9 nW/cm2 and 0.792 μJ/cm2 in the pressing mode. Our work broadly demonstrates how 2D materials can be effectively leveraged as building blocks in strategies for efficient electrochemical strain energy harvesting.
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- 2017
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37. Sustainable Capture and Conversion of Carbon Dioxide into Valuable Multiwalled Carbon Nanotubes Using Metal Scrap Materials
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Rachel Carter, Nitin Muralidharan, Anna Douglas, and Cary L. Pint
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Materials science ,General Chemical Engineering ,Scrap ,02 engineering and technology ,Carbon nanotube ,Carbon sequestration ,010402 general chemistry ,01 natural sciences ,law.invention ,Catalysis ,Metal ,chemistry.chemical_compound ,law ,Impurity ,Environmental Chemistry ,Electrochemical reduction of carbon dioxide ,Renewable Energy, Sustainability and the Environment ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Chemical engineering ,chemistry ,visual_art ,Carbon dioxide ,visual_art.visual_art_medium ,0210 nano-technology - Abstract
Increasing amounts of nondegradable waste and rising levels of atmospheric carbon dioxide (CO2) similarly threaten a sustainable future, leaving routes to address these issues at the forefront of ongoing research efforts. Here, we demonstrate a route where electrochemical processing of scrap metals extracts catalytic species to the surface that actively convert CO2 scavenged from the atmosphere to form multiwalled carbon nanotubes (MWCNTs). Our findings demonstrate two distinct pathways for this technique that is generalizable to a broad range of scrap metals. First is the case where the catalytic elements are the primary constituents of the material (e.g., Fe in stainless steel) and the reaction with CO2 consumes the material. Second is the case where the catalytic elements are impurities (e.g., Fe in brass) where reaction with CO2 leads to impurity consumption. Our results demonstrate facile growth of MWCNTs directly from irregular scraps, such as shavings and pipes. Overall, this study presents a route...
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- 2017
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38. Tunable Mechanochemistry of Lithium Battery Electrodes
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Rachel Carter, D. Greg Walker, Landon Oakes, Casey N. Brock, Adam P. Cohn, Deanna Schauben, Cary L. Pint, and Nitin Muralidharan
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Battery (electricity) ,Materials science ,Inorganic chemistry ,Intercalation (chemistry) ,General Engineering ,General Physics and Astronomy ,chemistry.chemical_element ,Vanadium ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Lithium battery ,0104 chemical sciences ,chemistry ,Mechanochemistry ,Pentoxide ,General Materials Science ,Lithium ,Composite material ,0210 nano-technology - Abstract
The interplay between mechanical strains and battery electrochemistry, or the tunable mechanochemistry of batteries, remains an emerging research area with limited experimental progress. In this report, we demonstrate how elastic strains applied to vanadium pentoxide (V2O5), a widely studied cathode material for Li-ion batteries, can modulate the kinetics and energetics of lithium-ion intercalation. We utilize atomic layer deposition to coat V2O5 materials onto the surface of a shapememory superelastic NiTi alloy, which allows electrochemical assessment at a fixed and measurable level of elastic strain imposed on the V2O5, with strain state assessed through Raman spectroscopy and X-ray diffraction. Our results indicate modulation of electrochemical intercalation potentials by ∼40 mV and an increase of the diffusion coefficient of lithium ions by up to 2.5-times with elastic prestrains of
- Published
- 2017
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39. Iron catalyzed growth of crystalline multi-walled carbon nanotubes from ambient carbon dioxide mediated by molten carbonates
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Nitin Muralidharan, Cary L. Pint, Landon Oakes, Anna Douglas, and Rachel Carter
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Materials science ,Nanotechnology ,02 engineering and technology ,General Chemistry ,Electrolyte ,Carbon nanotube ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,7. Clean energy ,Cathode ,0104 chemical sciences ,law.invention ,Anode ,Catalysis ,chemistry.chemical_compound ,Atomic layer deposition ,chemistry ,Chemical engineering ,law ,Carbon dioxide ,General Materials Science ,0210 nano-technology ,Electrochemical reduction of carbon dioxide - Abstract
Until now, research efforts focused on electrochemical conversion of carbon dioxide into stable carbon-based materials have been limited by poor understanding of catalytic effects occurring at surfaces. Here, we demonstrate the capability to simultaneously use atomic layer deposition (ALD), electrode composition control, and current density as a means to direct the formation of iron-based catalysts and grow highly crystalline multi-walled carbon nanotubes at high yields (99%) and with controlled average diameters of 27.5 nm from ambient carbon dioxide captured and dissolved in molten carbonate electrolytes. ALD of passive alumina coatings on a Ni anode prevents electrode corrosion processes and adverse deposition of Ni on the cathode that results in increased CNT diameters, lower CNT quality, and non-CNT products. On the cathode side where CNT growth occurs, our results elucidate the fine balance of iron catalyst accessibility from the cathode interior and the surface chemical properties in order to achieve high yield and high quality CNT growth. Our work provides an intersection between decades of research understanding on catalytic gas-phase growth of CNT materials and the ability to leverage these ideas to sustainably capture ambient carbon dioxide and produce functional CNT materials.
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- 2017
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40. Isothermal Sulfur Condensation into Carbon Scaffolds: Improved Loading, Performance, and Scalability for Lithium–Sulfur Battery Cathodes
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Landon Oakes, Nitin Muralidharan, Cary L. Pint, and Rachel Carter
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Materials science ,Capillary condensation ,chemistry.chemical_element ,Lithium–sulfur battery ,Nanotechnology ,02 engineering and technology ,Carbon nanotube ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Sulfur ,Cathode ,Isothermal process ,0104 chemical sciences ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,General Energy ,Chemical engineering ,chemistry ,law ,Physical and Theoretical Chemistry ,0210 nano-technology ,Faraday efficiency - Abstract
Here we demonstrate an isothermal technique that enables rapid vapor infiltration of sulfur into carbon templates to overcome scalability and performance bottlenecks associated with common melt infiltration techniques. Building on straightforward thermodynamic principles of capillary condensation, self-limited sulfur loadings up to 82 wt % can be achieved in as little as 10 min at temperatures between 155 and 175 °C. We demonstrate a broad range of device performance criteria using a carbon black–single-walled carbon nanotube binder-free cathode framework, including a side-by-side comparison to melt infiltrated electrodes with 74 wt % loading that shows improved capacity (1015 mAh/g vs 768 mAh/g), ∼92% capacity retention after 200 cycles at 0.5 C, and ∼98% Coulombic efficiency as a result of enhanced uniformity and conductivity. Further, we demonstrate this technique over a range of different electrodes (1) electrodes with high sulfur loading (82 wt %) with high initial discharge capacity of 1340 mAh/g, (...
- Published
- 2017
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41. Polysulfide Anchoring Mechanism Revealed by Atomic Layer Deposition of V2O5 and Sulfur-Filled Carbon Nanotubes for Lithium–Sulfur Batteries
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Nitin Muralidharan, Adam P. Cohn, Rachel Carter, Cary L. Pint, Landon Oakes, and Anna Douglas
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inorganic chemicals ,Materials science ,chemistry.chemical_element ,Nanotechnology ,02 engineering and technology ,Carbon nanotube ,engineering.material ,Surface engineering ,010402 general chemistry ,01 natural sciences ,law.invention ,chemistry.chemical_compound ,Atomic layer deposition ,Coating ,law ,General Materials Science ,Polysulfide ,021001 nanoscience & nanotechnology ,Sulfur ,Electrical contacts ,0104 chemical sciences ,chemistry ,Chemical engineering ,engineering ,0210 nano-technology ,Sulfur utilization - Abstract
Despite the promise of surface engineering to address the challenge of polysulfide shuttling in sulfur–carbon composite cathodes, melt infiltration techniques limit mechanistic studies correlating engineered surfaces and polysulfide anchoring. Here, we present a controlled experimental demonstration of polysulfide anchoring using vapor phase isothermal processing to fill the interior of carbon nanotubes (CNTs) after assembly into binder-free electrodes and atomic layer deposition (ALD) coating of polar V2O5 anchoring layers on the CNT surfaces. The ultrathin submonolayer V2O5 coating on the CNT exterior surface balances the adverse effect of polysulfide shuttling with the necessity for high sulfur utilization due to binding sites near the conductive CNT surface. The sulfur loaded into the CNT interior provides a spatially separated control volume enabling high sulfur loading with direct sulfur-CNT electrical contact for efficient sulfur conversion. By controlling ALD coating thickness, high initial discha...
- Published
- 2017
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42. Anode-Free Sodium Battery through in Situ Plating of Sodium Metal
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Rachel Carter, Nitin Muralidharan, Cary L. Pint, Keith Share, and Adam P. Cohn
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Sodium ,Inorganic chemistry ,Nucleation ,chemistry.chemical_element ,Bioengineering ,02 engineering and technology ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,7. Clean energy ,law.invention ,Metal ,law ,General Materials Science ,Graphite ,Mechanical Engineering ,General Chemistry ,Current collector ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Cathode ,0104 chemical sciences ,Anode ,chemistry ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,0210 nano-technology - Abstract
Sodium-ion batteries (SIBs) have been pursued as a more cost-effective and more sustainable alternative to lithium-ion batteries (LIBs), but these advantages come at the expense of energy density. In this work, we demonstrate that the challenge of energy density for sodium chemistries can be overcome through an anode-free architecture enabled by the use of a nanocarbon nucleation layer formed on Al current collectors. Electrochemical studies show this configuration to provide highly stable and efficient plating and stripping of sodium metal over a range of currents up to 4 mA/cm2, sodium loading up to 12 mAh/cm2, and with long-term durability exceeding 1000 cycles at a current of 0.5 mA/cm2. Building upon this anode-free architecture, we demonstrate a full cell using a presodiated pyrite cathode to achieve energy densities of ∼400 Wh/kg, far surpassing recent reports on SIBs and even the theoretical maximum for LIB technology (387 Wh/kg for LiCoO2/graphite cells) while still relying on naturally abundant ...
- Published
- 2017
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43. Role of carbon defects in the reversible alloying states of red phosphorus composite anodes for efficient sodium ion batteries
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Rachel Carter, Nitin Muralidharan, Landon Oakes, Mengya Li, Anna Douglas, and Cary L. Pint
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Materials science ,Chemical substance ,Sodium ,Composite number ,Alloy ,chemistry.chemical_element ,02 engineering and technology ,Carbon nanotube ,engineering.material ,010402 general chemistry ,01 natural sciences ,law.invention ,law ,General Materials Science ,Renewable Energy, Sustainability and the Environment ,Metallurgy ,Sodium-ion battery ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Anode ,chemistry ,Chemical engineering ,engineering ,0210 nano-technology ,Carbon - Abstract
Here we report the first mechanistic study investigating the effect of carbon defects on the evolution of different sodium–red phosphorus (red P) alloy states for stable high capacity sodium ion battery anodes. Using tunable sp2/sp3 carbon composites containing controlled single-walled carbon nanotube (SWCNT) and single-walled carbon nanohorn (SWCNH) compositions, we identify potentials over which both stable and unstable alloying of red P occurs with sodium. Examination of the stable alloy region includes both NaP and Na5P4 formation that occurs between 0.40 and 0.15 V where alloying is mostly independent of the carbon composite matrix chemistry. However, an unstable region corresponding to Na3P formation below 0.15 V results in capacity degradation that directly correlates with the density of carbon defects. In the unstable region, defects are observed to initiate deep alloying and poor reversibility due to the formation of irreversible Na3P products that form over the carbon surface. Our results present a mechanistic roadmap to guide the design of red P–carbon composite anodes to approach high theoretical sodium ion capacity (2596 mA h g−1) while simultaneously addressing chemical interactions that compromise performance stability.
- Published
- 2017
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44. Evaluation of electrochemical performance and redox activity of Fe in Ti doped layered P2-Na0.67Mn0.5Fe0.5O2 cathode for sodium ion batteries
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Jagjit Nanda, Devendrasinh Darbar, Indranil Bhattacharya, Raphaël P. Hermann, and Nitin Muralidharan
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Materials science ,Dopant ,General Chemical Engineering ,Doping ,Oxide ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Cathode ,0104 chemical sciences ,law.invention ,Dielectric spectroscopy ,symbols.namesake ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,symbols ,0210 nano-technology ,Raman spectroscopy ,Titanium - Abstract
Here, we report a wet synthesis-based titanium doping strategy to improve the structural stability and electrochemical performances, such as cycling stability and rate capability, of P2-type Na0.67Fe0.5Mn0.5O2 layered oxide cathodes. Through Ti4+ doping aimed at replacing some of the Mn and Fe atoms in the crystal structure, effective mitigation of the Jahn Teller distortion caused by active Mn3+ before charging and Fe4+ after charging was achieved. X-ray diffraction (XRD), Raman spectroscopy, Electrochemical Impedance Spectroscopy (EIS) and Mossbauer spectroscopy were used to investigate the effects of the Ti4+ dopant before and after cycling. It was observed that Ti4+ doping increased the Na layer thickness, minimized the lattice volume strain, showed better structural stability, minimally decreased Fe migration to the Na layer, and lowered charge transfer resistance in these P2-type cathodes. Overall, our reported synthesis methodology and electrochemical characterizations highlight the feasibility of Ti doping in sodium layered oxide P2-type cathodes.
- Published
- 2021
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45. (Invited) Cobalt Free Li-Ion Battery Cathode Materials for Next Generation Electric Vehicles
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Ruhul Amin, Ilias Belharouak, Rachid Essehli, and Nitin Muralidharan
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Battery (electricity) ,Materials science ,chemistry ,business.industry ,law ,Optoelectronics ,chemistry.chemical_element ,business ,Cobalt ,Cathode ,Ion ,law.invention - Abstract
The battery manufacturing industry has a cobalt problem! Over the recent years, rapid fluctuations in cobalt prices have created a drastic supply chain constraint that threatens to derail the burgeoning projections for electric vehicles over the next few decades. To reduce the cost of modern batteries to ~80$/kWh (to sustain the growing electric vehicle demands), it has become paramount that the amount of cobalt, the most expensive present-day battery cathode raw material, should be reduced to less than 50 mg at the cell level. Moreover, it is also important that any alternative cathode material developed, should facilitate a seamless integration into existing global battery manufacturing infrastructures to avoid a complete overhaul. The search for viable alternatives that address these challenges simultaneously is a continuing quest in today's battery research and development sectors. In this context, our team through a paradigm shifting approach has developed a new class of layered lithium ion battery cathode material with '0' cobalt in its composition. This new class of battery cathodes, termed the NFA class, has the general formula, LiNixFeyAlzO2 (where, x + y + z = 1)[1,2]. These layered cobalt-free cathodes are analogous in crystal structure and material properties to mainstream cobalt containing cathodes such as NCMs and NCAs while delivering comparable and in some cases better electrochemical performance. Here, I will present our efforts in the systematic development of these novel cathodes starting from compositional landscape investigations and advanced characterizations employing NFA material synthesized using the lab-scale sol-gel process. Through our approach, in-situ high temperature X-Ray and Neutron diffraction techniques were used to investigate the calcination and phase formation behavior while operando investigations using X-Ray diffraction and Mössbauer spectroscopy were employed to obtain a mechanistic understanding of the charge/discharge process of this new cobalt-free cathode material. Following these, the most promising compositional variants were upscaled using the co-precipitation process in continuous stirred tank reactors for obtaining kg levels of cathode material. Systematic optimization of reaction process variables ensured good particle morphologies, homogeneities and composition control. Electrochemical performance assessments performed in both half-cell and full-cell configurations tested in different voltage windows with upper cut-off voltages ranging from 4.1V to 4.5V demonstrated that the optimized NFA compositional variants deliver high capacities >200 mAh/g at 0.1C with good capacity retention >80% when cycled at C/3. Full pouch-cells (>1.5Ah) were then assembled using NFA electrodes fabricated using the slot-die coating technique with the upscaled cathode material demonstrating reasonable capacity retentions[3]. While the work presented here is still in an early stage of research, the immense potential that these NFA class of cathodes could have as viable candidates towards development of next generation cost effective lithium ion batteries is highlighted here. Overall, our research efforts in the development of this new class of cobalt-free cathodes aims to mitigate the battery industry's cobalt problem paving a promising pathway towards the wide adoption of electric vehicles in the coming decades. References: [1] Muralidharan, Nitin, et al. "LiNixFeyAlzO2, a new cobalt-free layered cathode material for advanced Li-ion batteries." Journal of Power Sources 471 (2020): 228389. [2] Muralidharan, Nitin, et al. "Lithium Iron Aluminum Nickelate, LiNixFeyAlzO2—New Sustainable Cathodes for Next‐Generation Cobalt‐Free Li‐Ion Batteries." Advanced Materials 32.34 (2020): 2002960. [3] Wood III, David L., et al. "Perspectives on the relationship between materials chemistry and roll-to-roll electrode manufacturing for high-energy lithium-ion batteries." Energy Storage Materials (2020).
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- 2021
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46. From the Junkyard to the Power Grid: Ambient Processing of Scrap Metals into Nanostructured Electrodes for Ultrafast Rechargeable Batteries
- Author
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Cary L. Pint, Adam P. Cohn, Haotian Sun, Andrew S. Westover, Nicholas Galioto, Nitin Muralidharan, Rachel Carter, and Landon Oakes
- Subjects
Battery (electricity) ,Renewable Energy, Sustainability and the Environment ,Chemistry ,Metallurgy ,Energy Engineering and Power Technology ,Scrap ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Energy storage ,0104 chemical sciences ,Brass ,Fuel Technology ,Chemistry (miscellaneous) ,visual_art ,Electrode ,Materials Chemistry ,visual_art.visual_art_medium ,0210 nano-technology ,Power density ,Voltage - Abstract
Here we present the first full-cell battery device that is developed entirely from scrap metals of brass and steel – two of the most commonly used and discarded metals. A room temperature chemical process is developed to convert brass and steel into functional electrodes for rechargeable energy storage that transforms these multicomponent alloys into redox-active iron-oxide and copper-oxide materials. The resulting steel-brass battery exhibits cell voltages up to 1.8 V, energy density up to 20 Wh/kg, power density up to 20 kW/kg, and stable cycling over 5000 cycles in alkaline electrolytes. Further, we show the versatility of this technique to enable processing of steel and brass materials of different shapes, sizes, and purity, such as screws and shavings, to produce functional battery components. The simplicity of this approach, building from commonly available chemicals enables a simple pathway to the local recovery, processing, and assembly of storage systems based on materials that would otherwise be discarded.
- Published
- 2016
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47. Electrically Conductive Hierarchical Carbon Nanotube Networks with Tunable Mechanical Response
- Author
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Benjamin Davis, Xingyi Yan, Matthew R. Maschmann, Nitin Muralidharan, Landon Oakes, and Cary L. Pint
- Subjects
Materials science ,Electrically conductive ,Nanotechnology ,02 engineering and technology ,Carbon nanotube ,Chemical vapor deposition ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,Catalysis ,Atomic layer deposition ,Coating ,law ,Specific surface area ,engineering ,General Materials Science ,0210 nano-technology ,Layer (electronics) - Abstract
Small diameter carbon nanotube (CNTs) are synthesized directly from a parent CNT forest using a floating catalyst chemical vapor deposition (CVD) method. To support a new CNT generation from an existing forest, an alumina coating was applied to the CNT forest using atomic layer deposition (ALD). The new generation of small diameter CNTs (8 nm average) surround the first generation, filling the interstitial regions. The hierarchical forests exhibit a 5-10-fold increase in stiffness, and the two generations are electrically addressable in spite of the interfacial alumina layer between them. This work enables the design of complex CNT architectures with hierarchical features that bring tailored properties such as high specific surface area and robust mechanical properties that can benefit a range of applications.
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- 2016
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48. Surface oxidized mesoporous carbons derived from porous silicon as dual polysulfide confinement and anchoring cathodes in lithium sulfur batteries
- Author
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Adam P. Cohn, Anna Douglas, Dennis Ejorh, Trenton M. Tovar, Cary L. Pint, Keith Share, Rachel Carter, and Nitin Muralidharan
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Battery (electricity) ,Materials science ,Inorganic chemistry ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,Porous silicon ,01 natural sciences ,7. Clean energy ,law.invention ,chemistry.chemical_compound ,law ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Polysulfide ,Renewable Energy, Sustainability and the Environment ,021001 nanoscience & nanotechnology ,Sulfur ,Cathode ,0104 chemical sciences ,Membrane ,chemistry ,Chemical engineering ,Electrode ,0210 nano-technology ,Mesoporous material - Abstract
Despite widespread focus on porous carbons for lithium-sulfur battery cathode materials, electrode design to preserve mass-specific performance and sustained extended cycling stability remains a challenge. Here, we demonstrate electrochemically etched porous silicon as a sacrificial template to produce a new class of functional mesoporous carbons optimized for dual chemical and physical confinement of soluble polysulfides in lithium-sulfur battery cathodes. Melt infiltration loading of sulfur at 60 wt% enables initial discharge capacity of 1350 mAh/gsulfur at rates of 0.1 C - approaching theoretical capacity of 1675 mAh/gsulfur. Cycling performance measured at 0.2 C indicates 81% capacity retention measured over 100 cycles with 830 mAh/gsulfur capacity. Unlike other carbons, this template combines structural properties necessary for sulfur containment and polysulfide confinement to achieve high specific capacity, but also boasts surface-bound oxygen-containing functional groups that are able to chemically anchor the soluble Li2Sn species on the interior of the mesoporous carbon to sustain cycling performance. In turn, this elucidates a scalable and competitive material framework that is capable, without the addition of additional membranes or inactive anchoring materials, of providing the simultaneous anchoring and confinement effects necessary to overcome performance limitations in lithium sulfur batteries.
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- 2016
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49. Durable potassium ion battery electrodes from high-rate cointercalation into graphitic carbons
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Adam P. Cohn, Cary L. Pint, Rachel Carter, Keith Share, Nitin Muralidharan, and Landon Oakes
- Subjects
Materials science ,Intercalation (chemistry) ,Nanotechnology ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,7. Clean energy ,01 natural sciences ,law.invention ,symbols.namesake ,Crystallinity ,Graphite intercalation compound ,chemistry.chemical_compound ,law ,General Materials Science ,Renewable Energy, Sustainability and the Environment ,Graphene ,Potassium-ion battery ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,chemistry ,Chemical engineering ,Electrode ,symbols ,0210 nano-technology ,Raman spectroscopy - Abstract
We report the first demonstration of potassium ion cointercalation into graphitic carbon electrodes including both natural graphite and multi-layered graphene in both diglyme and monoglyme based electrolytes. Contrary to conventional desolvation-based intercalation of potassium, we demonstrate excellent capacity retention of ∼80% at rates up to 10 A g−1 (30 second charge), with 95% capacity retention over 1000 cycles, and up to 100 mA h g−1 capacity. Raman and X-ray diffraction following 1000 cycles demonstrates no signature of defects, damage, or change to graphitic crystallinity compared to uncycled pristine materials that is attributed to weak ion–lattice interactions due to the solvated guest K ions. In situ Raman spectroscopy highlights the sequential formation of a stage 4, 3, 2, and 1 graphite intercalation compound (GIC) that occurs without the signature of dilute staging. In a charged stage 1 compound, we observe lattice expansion from 0.335 nm to 1.16 nm and measure the work function to be ∼3.4 eV. Overall, this system overcomes rate and durability bottlenecks that limit current K-ion battery electrodes, and gives promise to cointercalation for durable, fast, and low-cost storage systems.
- Published
- 2016
- Full Text
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50. New synthesis strategies to improve Co-Free LiNi0.5Mn0.5O2 cathodes: Early transition metal d0 dopants and manganese pyrophosphate coating
- Author
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Mahalingam Balasubramanian, Indranil Bhattacharya, Jason R. Croy, Chongmin Wang, Harry M. Meyer, Ethan C. Self, Nitin Muralidharan, Jagjit Nanda, Devendrasinh Darbar, Ilias Belharouak, Linze Li, and Chang Wook Lee
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Materials science ,Energy Engineering and Power Technology ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,Electrochemistry ,01 natural sciences ,law.invention ,symbols.namesake ,Coating ,Transition metal ,X-ray photoelectron spectroscopy ,law ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Dopant ,Renewable Energy, Sustainability and the Environment ,021001 nanoscience & nanotechnology ,Cathode ,0104 chemical sciences ,Chemical engineering ,engineering ,symbols ,0210 nano-technology ,Raman spectroscopy - Abstract
In this work, we report solution-based doping and coating strategies to improve the electrochemical performance of the Co-free layered oxide cathode LiNi0.5Mn0.5O2 (NM-50/50). Small amounts of d0 dopants (e.g., Mo6+and Ti4+, 0.5–1 at. %) increase the cathode's specific capacity, cycling stability, and rate capability. For example, a Mo-doped cathode with the nominal composition LiNi0.495Mn0.495Mo0.01O2 exhibits a high reversible capacity of 180 mA h/g at 20 mA/g compared to only 156 mA h/g for undoped NM-50/50. Effects of 1 at.% Mo dopant on the cathode structure were studied using a suite of characterization tools including X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy. These measurements demonstrate that Mo6+ dopant is enriched near the particle surface and improves the electrochemical performance of LiNi0.5Mn0.5O2 by: (i) reducing Li+/Ni2+ cation mixing which facilitates Li+ transport, (ii) mitigating undesirable phase transformations near the cathode surface, and (iii) altering the cathode/electrolyte interfacial chemistry. This work also reports the use of an inorganic Mn2P2O7 coating which enhances the cycling stability of Mo-doped NM-50/50, presumably through formation of a stable cathode electrolyte interphase (CEI) layer. Overall, the synthesis approaches reported herein are quite general and can potentially be expanded to other high voltage Li-ion battery cathodes.
- Published
- 2020
- Full Text
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