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137 results on '"Rahman, Muhammad Mominur"'

2. Ligand-channel-enabled ultrafast Li-ion conduction

Author

Lu, Di, Li, Ruhong, Rahman, Muhammad Mominur, Yu, Pengyun, Lv, Ling, Yang, Sheng, Huang, Yiqiang, Sun, Chuangchao, Zhang, Shuoqing, Zhang, Haikuo, Zhang, Junbo, Xiao, Xuezhang, Deng, Tao, Fan, Liwu, Chen, Lixin, Wang, Jianping, Hu, Enyuan, Wang, Chunsheng, and Fan, Xiulin

Published
2024
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9. Prospects of polymer coatings for all solid-state and emerging Li-ion batteries.

Author

Amin, Ruhul, Nisar, Umair, Rahman, Muhammad Mominur, Dixit, Marm, Abouimrane, Ali, and Belharouak, Ilias

Abstract

Polymers possess processing flexibility as they can be coated on cathode particles before/after electrode fabrication and on the solid-state electrolyte surface in all-solid-state batteries (ASSBs). Their narrow electrochemical stability window limits the use of polymers directly as an electrolyte against high voltage cathodes. However, when a polymer is coated directly on battery cathodes and cycled with conventional liquid electrolytes, they exhibit superior battery performance in comparison to uncoated ones. A deeper insight was not sought in the literature. There might be a great possibility of in situ formation of an ultra-thin protective layer in-between the polymer and cathode interface at the coating development stage or in the formation cycle of the electrochemical cell. The current ASSBs demand flexible, easily scalable coating materials, which can accommodate the volume expansion–contraction during cycling and can minimize the lattice stress. However, a much better fundamental understanding is needed on polymer/ceramic interfaces. This focused review is concentrated on flexible polymers with high ionic and electronic conductivities that can be used for coating cathode particles and Li anodes. Overall, this article has analyzed and validated the application of various types of polymers in lithium-ion batteries and ASSBs comprehensively with an emphasis on the effect of coating morphologies and thickness on performance. Finally, this review gives a brief discussion on the prospects and suitability of polymers as coating layers. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Mapping Lattice Distortions in LiNi0.5Mn1.5O4 Cathode Materials

Author

Spence, Stephanie L., primary, Hu, Anyang, additional, Jiang, Meng, additional, Xu, Zhengrui, additional, Yang, Zhijie, additional, Rahman, Muhammad Mominur, additional, Li, Luxi, additional, Chu, Yong S., additional, Xiao, Xianghui, additional, Huang, Xiaojing, additional, and Lin, Feng, additional

Published
2022
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25. Multiscale chemistry and design principles of stable cathode materials for Na-ion and Li-ion batteries

Author

Rahman, Muhammad Mominur, Chemistry, Lin, Feng, Madsen, Louis A., Li, Zheng, and Morris, Amanda J.

Subjects
redox reactions, synchrotron characterizations, alkali-ion batteries, layered oxide, anionic redox
Abstract

Alkali-ion batteries have revolutionized modern life through enabling the widespread application of portable electronic devices. The call for adapting renewable energy in many applications will also see an increase in the demand of alkali-ion batteries, specially to account for the intermittent nature of the renewable energy sources. However, the advancement of such technologies will require innovation on the forefront of materials development as well as fundamental understanding on the physical and chemical processes from atomic to device length scales. Herein, we focus on advancing energy storage devices such as alkali-ion batteries through cathode materials development and discovery as well as fundamental understanding through multiscale advanced synchrotron spectroscopic and microscopic characterizations. Multiscale electrochemical properties of cathode materials are unraveled through complementary characterizations and design principles are developed for stable cathode materials for alkali-ion batteries. In Chapter 1, we provide a comprehensive background on alkali-ion batteries and cathode materials. The future prospect of Li-ion and beyond Li-ion batteries are summarized. Surface to bulk chemistry of alkali-ion cathode materials is introduced. The prospect of combined cationic and anionic redox processes to enhance the energy density of cathode materials is discussed. Structural and chemical complexities in cathode materials during electrochemical cycling as well as due to anionic redox are summarized. In Chapter 2, we explain an inaugural effort on tuning the 3D nano/mesoscale elemental distribution of cathode materials to positively impact the electrochemical performance of cathode materials. We show that engineering the elemental distribution can take advantage of depth dependent redox reactions and curtail harmful side reactions at cathode-electrolyte interface which can stabilize the electrochemical performance. In Chapter 3, we show that the surface to bulk chemistry of cathode particles is distinct under applied electrochemical potential. We show that the severe surface degradation at the beginning stages of cycling can impact the long-term cycling performance of cathode materials in alkali-ion batteries. In Chapter 4, we utilize the structural and chemical complexities of sodium layered oxide materials to synthesize stable cathode materials for half cell and full cell sodium-ion batteries. Meanwhile, challenges with enabling long term cycling (more than 1000 cycles) are deciphered to be transition metal dissolution and local and global structural transformations. In Chapter 5, we utilize anionic redox in conjunction with conventional cationic redox of cathode materials for alkali-ion batteries to enhance the energy density. We show that the stability of anionic redox is closely related to the local transition metal environment. We also show that a reversible evolution of local transition metal environment during cycling can lead to stable anionic redox. In Chapter 6, we provide design principles for cathode materials for advanced alkali-ion batteries for application under extreme environments (e.g., outer space and nuclear power industries). For the first time, we systematically study the microstructural evolution of cathode materials under extreme irradiation and temperature to unravel the key factors affecting the stability of battery cathodes. Our experimental and computational studies show that a cathode material with smaller cationic antisite defect formation energy than another is more resilient under extreme environments. Doctor of Philosophy Alkali-ion batteries are finding many applications in our life, ranging from portable electronic devices, electric vehicles, grid energy storage, space exploration and so on. Cathode materials play a crucial role in the overall performance of alkali-ion batteries. Reliable application of alkali-ion batteries requires stable and high-energy cathode materials. Hence, design principles must be developed for high-performance cathode materials. Such design principles can be benefited from advanced characterizations that can reveal the surface-to-bulk properties of cathode materials. Herein, we focus on formulating design principles for cathode materials for alkali-ion batteries. Aided by advanced synchrotron characterizations, we reveal the surface-to-bulk properties of cathodes and their role on the long-term stability of alkali-ion batteries. We present tuning structural and chemical complexities as a method of designing advanced cathode materials. We show that energy density of cathode materials can be enhanced by taking advantage of a combined cationic and anionic redox. Lastly, we show design principles for stable cathode materials under extreme conditions in outer space and nuclear power industries (under extreme irradiation and temperature). Our study shows that structurally resilient cathode materials under extreme irradiation and temperature can be designed if the size of positively charged cations in cathode materials are almost similar. Our study provides valuable insights on the development of advanced cathode materials for alkali-ion batteries which can aid the future development of energy storage devices.

Published
2021

27. Chemical Modulation of Local Transition Metal Environment Enables Reversible Oxygen Redox in Mn-Based Layered Cathodes

Author

Rahman, Muhammad Mominur, primary, McGuigan, Scott, additional, Li, Shaofeng, additional, Gao, Lina, additional, Hou, Dong, additional, Yang, Zhijie, additional, Xu, Zhengrui, additional, Lee, Sang-Jun, additional, Sun, Cheng-Jun, additional, Liu, Jue, additional, Huang, Xiaojing, additional, Xiao, Xianghui, additional, Chu, Yong, additional, Sainio, Sami, additional, Nordlund, Dennis, additional, Kong, Xueqian, additional, Liu, Yijin, additional, and Lin, Feng, additional

Published
2021
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32. Charge distribution guided by grain crystallographic orientations in polycrystalline battery materials

Author

Chemistry, Xu, Zhengrui, Jiang, Zhisen, Kuai, Chunguang, Xu, Rong, Qin, Changdong, Zhang, Yan, Rahman, Muhammad Mominur, Wei, Chenxi, Nordlund, Dennis, Sun, Cheng-Jun, Xiao, Xianghui, Du, Xi-Wen, Zhao, Kejie, Yan, Pengfei, Liu, Yijin, Lin, Feng, Chemistry, Xu, Zhengrui, Jiang, Zhisen, Kuai, Chunguang, Xu, Rong, Qin, Changdong, Zhang, Yan, Rahman, Muhammad Mominur, Wei, Chenxi, Nordlund, Dennis, Sun, Cheng-Jun, Xiao, Xianghui, Du, Xi-Wen, Zhao, Kejie, Yan, Pengfei, Liu, Yijin, and Lin, Feng

Abstract

Architecting grain crystallographic orientation can modulate charge distribution and chemomechanical properties for enhancing the performance of polycrystalline battery materials. However, probing the interplay between charge distribution, grain crystallographic orientation, and performance remains a daunting challenge. Herein, we elucidate the spatially resolved charge distribution in lithium layered oxides with different grain crystallographic arrangements and establish a model to quantify their charge distributions. While the holistic "surface-to-bulk" charge distribution prevails in polycrystalline particles, the crystallographic orientation-guided redox reaction governs the charge distribution in the local charged nanodomains. Compared to the randomly oriented grains, the radially aligned grains exhibit a lower cell polarization and higher capacity retention upon battery cycling. The radially aligned grains create less tortuous lithium ion pathways, thus improving the charge homogeneity as statistically quantified from over 20 million nanodomains in polycrystalline particles. This study provides an improved understanding of the charge distribution and chemomechanical properties of polycrystalline battery materials.

Published
2020

39. Dopant Distribution in Co-Free High-Energy Layered Cathode Materials

Author

Mu, Linqin, primary, Zhang, Rui, additional, Kan, Wang Hay, additional, Zhang, Yan, additional, Li, Luxi, additional, Kuai, Chunguang, additional, Zydlewski, Benjamin, additional, Rahman, Muhammad Mominur, additional, Sun, Cheng-Jun, additional, Sainio, Sami, additional, Avdeev, Maxim, additional, Nordlund, Dennis, additional, Xin, Huolin L., additional, and Lin, Feng, additional

Published
2019
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40. Fabrication of Nanostructured Kaolinite Doped Composite Films from Silicone Rubber with Enhanced Properties

Author

Zakaria, Abdullah Muhammad, Dey, Shaikat Chandra, Rahman, Muhammad Mominur, Sarker, Mithun, Ashaduzzaman, Md., Shamsuddin, Sayed Md., Zakaria, Abdullah Muhammad, Dey, Shaikat Chandra, Rahman, Muhammad Mominur, Sarker, Mithun, Ashaduzzaman, Md., and Shamsuddin, Sayed Md.

Abstract

Naturally occurring nanomaterials are finding growing interests in tailoring properties of engineering polymers for advanced applications. The objective of this study was to develop environment-friendly nanocomposite films by reinforcing kaolinite nanofillers (1–10 wt%) in silicone rubber (SR) matrix using a simple solvent casting technique. Kaolinite-reinforced films showed substantial improvement in mechanical (tensile strength, Young’s modulus, and elongation at break) and thermal properties at very low filler loading (5 wt%). The improvement of solvent resistance nature of the fabricated films was another critical aspect of this study. Unfilled SR film showed ~19% weight loss when immersed in toluene for 4 h at 25 °C, whereas only ~4% weight loss was recorded in the case of 5% (w/w) kaolinite loaded film. Therefore, kaolinite has the potential to bring significant improvement in the properties of SR. This study indicates that there is plenty of room at the bottom for proper utilization of the potential of kaolinite for developing SR-based composite materials for potential applications in many industries, such as textile, household cleaning, construction, electronics, automotive, medical, etc.

Published
2019
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41. Fabrication of Nanostructured Kaolinite Doped Composite Films from Silicone Rubber with Enhanced Properties

Author

Chemistry, Zakaria, Abdullah Muhammad, Dey, Shaikat Chandra, Rahman, Muhammad Mominur, Sarker, Mithun, Ashaduzzaman, Md., Shamsuddin, Sayed Md., Chemistry, Zakaria, Abdullah Muhammad, Dey, Shaikat Chandra, Rahman, Muhammad Mominur, Sarker, Mithun, Ashaduzzaman, Md., and Shamsuddin, Sayed Md.

Abstract

Naturally occurring nanomaterials are finding growing interests in tailoring properties of engineering polymers for advanced applications. The objective of this study was to develop environment-friendly nanocomposite films by reinforcing kaolinite nanofillers (1–10 wt%) in silicone rubber (SR) matrix using a simple solvent casting technique. Kaolinite-reinforced films showed substantial improvement in mechanical (tensile strength, Young’s modulus, and elongation at break) and thermal properties at very low filler loading (5 wt%). The improvement of solvent resistance nature of the fabricated films was another critical aspect of this study. Unfilled SR film showed ~19% weight loss when immersed in toluene for 4 h at 25 °C, whereas only ~4% weight loss was recorded in the case of 5% (w/w) kaolinite loaded film. Therefore, kaolinite has the potential to bring significant improvement in the properties of SR. This study indicates that there is plenty of room at the bottom for proper utilization of the potential of kaolinite for developing SR-based composite materials for potential applications in many industries, such as textile, household cleaning, construction, electronics, automotive, medical, etc.

Published
2019

42. Facile synthesis of TiO2/Chitosan nanohybrid for adsorption-assisted rapid photodegradation of an azo dye in water.

Author

Sultana, Tabassum, Dey, Shaikat Chandra, Molla, Md. Ashraful Islam, Hossain, Mohammad Rahat, Rahman, Muhammad Mominur, Quddus, Md. Saiful, Moniruzzaman, Mohammad, Shamsuddin, Sayed Md., and Sarker, Mithun

Abstract

A series of bifunctional nanohybrids containing different proportions of chitosan and titanium dioxide (TiO2) were prepared through precipitation technique and applied for removal of a model anionic azo dye, Remazol Orange 3R (RO), from aqueous solution. This study reveals the dual benefit of adsorption and photocatalytic degradation of RO by TiO2/Chitosan nanohybrids. Nanohybrid fabricated from 80% TiO2 (w/w) and 20% chitosan (w/w) termed as T0.80CS0.20 removed ∼98.8% RO within only 8 min at pH 2.0 under sunlight irradiation from 60 mg L−1 dye solution. This was mainly due to the simultaneous role of adsorption and photodegradation activities of nanohybrids. The adsorption performance of T0.80CS0.20 was investigated in terms of the Langmuir isotherm under dark and the maximum adsorption capacity of T0.80CS0.20 for RO was found to be 243.9 mg g−1. Electrostatic interaction was suggested as a plausible mechanism for RO adsorption whereas photogenerated holes controlled photocatalytic degradation of RO by producing sufficient quantities of different radical species. In addition, T0.80CS0.20 can be regenerated for removal of RO by simple alkali washing. Therefore, T0.80CS0.20 is recommended as a promising photocatalyst for the removal of RO dye from water. [ABSTRACT FROM AUTHOR]

Published
2021
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44. Targeted Surface Doping with Reversible Local Environment Improves Oxygen Stability at the Electrochemical Interfaces of Nickel-Rich Cathode Materials

Author

Steiner, James D., primary, Cheng, Hao, additional, Walsh, Julia, additional, Zhang, Yan, additional, Zydlewski, Benjamin, additional, Mu, Linqin, additional, Xu, Zhengrui, additional, Rahman, Muhammad Mominur, additional, Sun, Huabin, additional, Michel, F. Marc, additional, Sun, Cheng-Jun, additional, Nordlund, Dennis, additional, Luo, Wei, additional, Zheng, Jin-Cheng, additional, Xin, Huolin L., additional, and Lin, Feng, additional

Published
2019
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47. Surface Characterization of Li-Substituted Compositionally Heterogeneous NaLi0.045Cu0.185Fe0.265Mn0.505O2 Sodium-Ion Cathode Material

Author

Rahman, Muhammad Mominur, primary, Zhang, Yan, additional, Xia, Sihao, additional, Kan, Wang Hay, additional, Avdeev, Maxim, additional, Mu, Linqin, additional, Sokaras, Dimosthenis, additional, Kroll, Thomas, additional, Du, Xi-Wen, additional, Nordlund, Dennis, additional, Liu, Yijin, additional, and Lin, Feng, additional

Published
2019
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50. Probing Dopant Redistribution, Phase Propagation, and Local Chemical Changes in the Synthesis of Layered Oxide Battery Cathodes.

Author

Yang, Zhijie, Mu, Linqin, Hou, Dong, Rahman, Muhammad Mominur, Xu, Zhengrui, Liu, Jue, Nordlund, Dennis, Sun, Cheng‐Jun, Xiao, Xianghui, and Lin, Feng

Subjects
CHEMICAL synthesis, CATHODES, DOPING agents (Chemistry), OXIDATION states, OXIDES, SPECTROSCOPIC imaging, CALCINATION (Heat treatment)
Abstract

Achieving the targeted control of layered oxide properties calls for more fundamental studies to mechanistically probe their evolution during their synthesis. Herein, dopant distribution, phase propagation, and local chemical changes as well as their interplay in multielement‐doped LiNiO2 materials are investigated using spectroscopic, imaging, and scattering techniques. It is shown that dopants undergo dynamic redistribution in the Ni(OH)2 host lattice at the early stage of calcination (below 300 °C). Such redistribution behavior exhibits strong dopant‐dependent characteristics, allowing for targeted surface and bulk doping control. The Ni oxidation process exhibits depth‐dependent characteristics and the most rapid Ni oxidation takes place between 300 and 700 °C. Using Ni oxidation state as the proxy for the phase transformation, the buildup of heterogenous phase propagation in the early stage of calcination is shown, especially along the radial direction of secondary particles. The radial heterogenous phase distribution gradually decreases upon completing the calcination. However, a high degree of mosaic‐like heterogeneity may still be present in the final product, departing from the perfect layered oxide. The present study offers fundamental insights into manipulating multiscale materials properties during calcination for obtaining stable, high‐energy layered oxide cathodes. [ABSTRACT FROM AUTHOR]

Published
2021
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