31 results on '"Guangmei Hou"'
Search Results
2. A novel coral-like garnet for high-performance PEO-based all solid-state batteries
- Author
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Jianwei Li, Zhen Zeng, Jun Cheng, Jiajun Wang, Guangmei Hou, Kaikai Li, Qiong Chen, Deping Li, Lijie Ci, Qunhui Yuan, and Qing Sun
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Battery (electricity) ,Materials science ,chemistry.chemical_element ,Electrolyte ,Electrochemistry ,Microstructure ,chemistry ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,Ionic conductivity ,General Materials Science ,Lithium ,Ceramic ,Short circuit - Abstract
As one of the most promising next-generation energy storage devices, the lithium-metal battery has been extensively investigated. However, safety issues and undesired lithium dendrite growth hinder its development. The application of solid-state electrolytes has attracted increasing attention as they can solve safety issues and show great potential to inhibit the growth of lithium dendrites. Polyethylene oxide (PEO)-based electrolytes are very promising due to their enhanced safety and excellent flexibility. However, they suffer from low ionic conductivity at room temperature and cannot effectively inhibit lithium dendrites at high temperatures due to the intrinsic semicrystalline properties and poor mechanical strength. In this work, a novel coral-like Li6.25Al0.25La3Zr2-O12 (C-LALZO) is synthesized to serve as an active ceramic filler in PEO. The PEO with LALZO coral (PLC) exhibits increased ionic conductivity and mechanical strength, which leads to uniform deposition/stripping of lithium metal. The Li symmetric cells with PLC do not cause a short circuit after cycling for 1500 h at 60°C. The assembled LiFePO4/PLC/Li batteries display excellent cycling stability at both 60 and 50°C. This work reveals that the electrochemical properties of the composite electrolyte can be effectively improved by tuning the microstructure of the filler, such as the C-LALZO architecture.
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- 2021
3. Spontaneous In Situ Surface Alloying of Li-Zn Derived from a Novel Zn2+-Containing Solid Polymer Electrolyte for Steady Cycling of Li Metal Battery
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Zhen Zeng, Jun Cheng, Guangmei Hou, Lijie Ci, Shang Wang, Guifang Han, and Deping Li
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Battery (electricity) ,In situ ,Materials science ,Flexibility (anatomy) ,Polymer electrolytes ,General Chemical Engineering ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,01 natural sciences ,Metal ,medicine ,Environmental Chemistry ,chemistry.chemical_classification ,Renewable Energy, Sustainability and the Environment ,General Chemistry ,Polymer ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,medicine.anatomical_structure ,Chemical engineering ,chemistry ,visual_art ,Electrode ,visual_art.visual_art_medium ,0210 nano-technology - Abstract
Solid polymer electrolytes (SPEs) are preferable in the pursuit for developing high-energy Li metal batteries due to their inherent flexibility and intimate contact with electrodes. However, contin...
- Published
- 2021
4. Nitrogen and sulfur co-doped porous carbon fibers film for flexible symmetric all-solid-state supercapacitors
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Jun Lou, Lina Chen, Guangmei Hou, Ziyan Wen, Yanhui Li, Lijie Ci, Weipeng Wang, Qing Ai, and Long Chen
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Supercapacitor ,Materials science ,Heteroatom ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Capacitance ,0104 chemical sciences ,chemistry ,Chemical engineering ,Nanofiber ,Specific surface area ,Electrode ,General Materials Science ,0210 nano-technology ,Carbon - Abstract
Flexible supercapacitors have drawn tremendous attention resulting from the rapid development of wearable electronic devices. Herein, we develop an effective and facile two-step approach to prepare high content nitrogen, sulfur co-doped porous carbon nanofibers film as electrodes of flexible supercapacitors. Benefiting from the high specific surface area and rich nitrogen/sulfur content, nitrogen and sulfur co-doped porous carbon fibers film (N, S co-doped PCFF) electrodes exhibit a high mass specific capacitance of 307.8 F g−1, and the capacitance retains 98% of initial capacitance after 5000 cycles in a three-electrode system. The as-assembled flexible supercapacitor devices with polyvinyl alcohol/KOH gel electrolyte demonstrate a highest mass specific capacitance of single electrode of 183.9 F g-1 at the scan rate of 2 mV s-1, which is better than that of other heteroatom doping carbon materials. In addition, the energy density reaches as high as 16.35 Wh kg−1 with the power density of 147 W kg−1 and retains as 5.34 Wh kg−1 with higher power density of 2402 W kg−1. Furthermore, the flexible devices show good cycling stability, superior flexibility and stable electrochemical performance.
- Published
- 2020
5. Composite solid electrolyte of Na3PS4-PEO for all-solid-state SnS2/Na batteries with excellent interfacial compatibility between electrolyte and Na metal
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Qing Ai, Lijie Ci, Guangmei Hou, Jinkui Feng, Xiangkun Nie, Linna Dai, Jun Cheng, Yuanyuan Li, and Xiaoyan Xu
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Materials science ,Composite number ,Oxide ,Energy Engineering and Power Technology ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Metal ,chemistry.chemical_compound ,Fuel Technology ,Chemical engineering ,chemistry ,visual_art ,Electrode ,visual_art.visual_art_medium ,Fast ion conductor ,Ionic conductivity ,0210 nano-technology ,Energy (miscellaneous) - Abstract
High ionic conductivity and superior interfacial stability of solid electrolytes at the electrodes are crucial factors for high-performance all-solid-state sodium batteries. Herein, a composite solid electrolyte Na3PS4-polyethylene oxide is synthesized by the solution-phase reaction method with an improved ionic conductivity up to 9.4 × 10−5 S/cm at room temperature. Moreover, polyethylene oxide polymer layer is wrapped homogeneously on the surface of Na3PS4 particles, which could effectively avoid the direct contact between Na3PS4 electrolyte and sodium metal, thus alleviate their side reactions. We demonstrate that all-solid-state battery SnS2/Na with the composite solid electrolyte Na3PS4-polyethylene oxide delivers an enhanced electrochemical performance with 230 mAh/g after 40 cycles.
- Published
- 2020
6. Stable Lithium Anode of Li–O2 Batteries in a Wet Electrolyte Enabled by a High-Current Treatment
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Zhen Liang, Yuqing Yao, Guangmei Hou, Linna Dai, Lijie Ci, Pengchao Si, Huanhuan Guo, and Chuanliang Wei
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Materials science ,chemistry.chemical_element ,Nanotechnology ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Energy storage ,0104 chemical sciences ,Anode ,chemistry ,Energy density ,General Materials Science ,Lithium ,Physical and Theoretical Chemistry ,Current (fluid) ,0210 nano-technology - Abstract
Rechargeable Li–air (O2) batteries have attracted a great deal of attention because of their high theoretical energy density and been regarded as a promising next-generation energy storage technolo...
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- 2019
7. High Current Enabled Stable Lithium Anode for Ultralong Cycling Life of Lithium–Oxygen Batteries
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Qing Ai, Guangmei Hou, Qidi Sun, Jun Lou, Pengchao Si, Deping Li, Lijie Ci, Huanhuan Guo, Guanghui Min, and Jinkui Feng
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Chemical substance ,Materials science ,chemistry.chemical_element ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Oxygen ,Energy storage ,0104 chemical sciences ,Anode ,chemistry ,Energy density ,General Materials Science ,Lithium ,High current ,0210 nano-technology ,Science, technology and society - Abstract
Rechargeable lithium–oxygen (Li–O2) batteries (LOBs) with extremely high theoretical energy density have been regarded as a promising next-generation energy storage technology. However, the limited...
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- 2019
8. Growth direction control of lithium dendrites in a heterogeneous lithiophilic host for ultra-safe lithium metal batteries
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Pengchao Si, Huanhuan Guo, Guangmei Hou, Pulickel M. Ajayan, Qing Ai, Fei Ding, Xiaoyan Xu, Lijie Ci, Jinkui Feng, Lin Zhang, Qidi Sun, Shirui Guo, and Xiaohua Ren
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Materials science ,Renewable Energy, Sustainability and the Environment ,Nucleation ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Copper ,0104 chemical sciences ,Anode ,Metal ,chemistry ,visual_art ,visual_art.visual_art_medium ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,Composite material ,Lithium metal ,0210 nano-technology ,Porosity ,Faraday efficiency ,Separator (electricity) - Abstract
Dendritic growth of the metallic lithium anode cannot be fully avoided for prolonged cycling due to the inherent thermodynamic and kinetic tendency, which causes serious safety issues. Here, we strategically control the lithium metal growth direction by designing a three-dimensional porous host with lithiophilic-lithiophobic characterized ligaments. Therefore, lithium metal can only nucleate on the lithiophilic back surface and grow toward the direction away from the separator. Such ‘backside-growth’ can ensure safe battery operation even when lithium dendrites exist. For a proof-of-concept study, highly lithiophilic gold layer is sputtered on backside surface of each copper foam ligament. During lithium plating, lithium nucleates on the lithiophilic backside and keeps growing conformably from the existing nuclei towards the opposite direction to the separator, and eventually forms a lithium-metal layer with highly compacted self-aligned columnar structure. The novel approach controls lithium deposition in two aspects simultaneously: growth direction and morphology. Notably, the featured surface dendrite-free anode exhibits ultra-long-term stable cycling with a high Coulombic efficiency (e.g., 95.0% after 300 cycles, 0.5 mA cm−2, 1 mA h cm−2). This work may not only pave ways for building ultimate safe lithium batteries but also conceptually provides new opportunities for other metal anodes.
- Published
- 2019
9. Improved interfacial floatability of superhydrophobic and compressive S, N co-doped graphene aerogel by electrostatic spraying for highly efficient organic pollutants recovery from water
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Guangmei Hou, Xiaoxin Ma, Long Chen, Jinkui Feng, Qiong Chen, Huanhuan Guo, Lijie Ci, Lin Zhang, Pengchao Si, Xiaoyan Xu, and Xiaohua Ren
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Materials science ,Graphene ,General Physics and Astronomy ,Aerogel ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Hydrothermal circulation ,0104 chemical sciences ,Surfaces, Coatings and Films ,law.invention ,Contact angle ,Adsorption ,Chemical engineering ,Superhydrophilicity ,law ,Wetting ,0210 nano-technology ,Porosity - Abstract
Sulfur and nitrogen co-doped graphene aerogel with Janus wettability of superhydrophobic/superhydrophilic was prepared with hydrothermal reduction combined with electrostatic spraying method. The upper surface exhibited an interconnected and porous 3D network with superhydrophobic property (water contact angle > 150°), while the under surface displayed a continuous membrane structure possessing rich wrinkles with superhydrophilicity (water contact angle
- Published
- 2018
10. In Situ Synthesis of a Lithiophilic Ag-Nanoparticles-Decorated 3D Porous Carbon Framework toward Dendrite-Free Lithium Metal Anodes
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Guangmei Hou, Lijie Ci, Pengchao Si, Wei Zhai, Jinkui Feng, Shirui Guo, Lin Zhang, and Qidi Sun
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In situ ,Materials science ,Renewable Energy, Sustainability and the Environment ,General Chemical Engineering ,Nucleation ,chemistry.chemical_element ,Ag nanoparticles ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,Porous carbon ,Chemical engineering ,chemistry ,Environmental Chemistry ,Dendrite (metal) ,0210 nano-technology ,Porosity ,Carbon - Abstract
Three-dimensional (3D) porous N-doped carbon nanoflake structures decorated with in situ formed Ag nanoparticles (Ag-NCNS) have been synthesized for the first time by a feasible salt-assisted polym...
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- 2018
11. Li7P3S11/poly(ethylene oxide) hybrid solid electrolytes with excellent interfacial compatibility for all-solid-state batteries
- Author
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Pengchao Si, Jinkui Feng, Shirui Guo, Yang Liu, Xiangkun Nie, Lijie Ci, Lin Zhang, Xiaoyan Xu, Qing Ai, and Guangmei Hou
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chemistry.chemical_classification ,Materials science ,Renewable Energy, Sustainability and the Environment ,Oxide ,Energy Engineering and Power Technology ,02 engineering and technology ,Polymer ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Electrode ,Fast ion conductor ,Ionic conductivity ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Faraday efficiency - Abstract
Low ionic conductivity and poor interfacial compatibility between lithium electrodes and Li7P3S11 sulfide solid electrolytes are the greatest challenges for all-solid state lithium-sulfur batteries. Herein, we introduce a hybrid solid electrolyte with Li7P3S11 being wrapped with polyethylene oxide-LiClO4 (PEO-LiClO4). As served as conductive bridge between Li7P3S11 particles, PEO-LiClO4 would provide Li+ transition paths between Li7P3S11 particles, thus successfully improve its ionic conductivity. Moreover, the polymer layer of PEO-LiClO4 can isolate lithium metal and Li7P3S11 solid electrolyte, suppressing the reaction between lithium electrode and Li7P3S11 electrolyte. Therefore, hybrid solid electrolyte Li7P3S11-PEO-LiClO4 shows excellent interfacial compatibility with lithium foil. Lithium-sulfur battery with the hybrid electrolyte Li7P3S11-PEO-LiClO4 exhibits much improved electrochemical performance with better cycling stability and higher Coulombic efficiency.
- Published
- 2018
12. Sheet-like garnet structure design for upgrading PEO-based electrolyte
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Deping Li, Qunhui Yuan, Qiong Chen, Jiajun Wang, Guangmei Hou, Jun Cheng, Lijie Ci, and Kaikai Li
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chemistry.chemical_classification ,Materials science ,General Chemical Engineering ,Diffusion ,Salt (chemistry) ,chemistry.chemical_element ,General Chemistry ,Polymer ,Electrolyte ,Exfoliation joint ,Industrial and Manufacturing Engineering ,chemistry ,Chemical engineering ,Fast ion conductor ,Environmental Chemistry ,Lithium ,Solubility - Abstract
Polyoxyethylene (PEO)-based electrolyte is one of the most promising solid-state electrolyte (SSE) candidates for all-solid-state batteries due to its high flexible and salt solubility. Recently, morphological control on active fillers is confirmed as a critical issue affecting the performance of SSE. However, the lack of comprehensive research is hindering the understanding over the growth mechanism of the structured active fillers. Especially, compared with other dimensions, the studies on the growth mechanism of two-dimensional (2D) active fillers are quite limited due to the difficulties in physical methods such as exfoliation. Herein, sheet-like LLZAO (Li6.25La3Zr2Al0.25O12) (SL) is synthesized by bottom-up method to upgrade PEO matrix (SL@PEO). In addition, the growth mechanism of SL is proposed, which provides a new sight for morphology control over inorganic solid electrolytes. The SL structure provides continuous interfaces between the fillers and the polymer matrix, which ensures rapid diffusion of lithium ions. In addition, the SL can provide more nature barriers for electrolyte to suppress the lithium dendrites growth. The lithium symmetric cells adopting SL@PEO present prolonged cycling stability and higher critical current density compared with the control samples. The assembled all-solid-state LiFePO4/SL@PEO/Li batteries exhibit superior cycling stability and rate capability.
- Published
- 2022
13. Enhanced Cycling Performance of Li–O2 Battery by Using a Li3PO4-Protected Lithium Anode in DMSO-Based Electrolyte
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Guangmei Hou, Jun Lou, Xiaoxin Ma, Jinkui Feng, Pengchao Si, Linna Dai, Huanhuan Guo, Lin Zhang, Shirui Guo, Jianguang Guo, Xiaohua Ren, and Lijie Ci
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Materials science ,Life span ,Dimethyl sulfoxide ,Energy Engineering and Power Technology ,02 engineering and technology ,Electrolyte ,Synergistic combination ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Anode ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Materials Chemistry ,Chemical Engineering (miscellaneous) ,Specific energy ,Electrical and Electronic Engineering ,0210 nano-technology ,Cycling - Abstract
Lithium–oxygen batteries (LOBs) have attracted increasing interest because of their superior theoretical specific energy. However, the stability of lithium metal anode is one of the obstacles limiting their practical applications. Here, we introduce an artificial Li3PO4 solid electrolyte interphase (SEI) film to protect the lithium anode in LOB with LiI/LiNO3/DMSO (dimethyl sulfoxide) electrolyte. The Li3PO4-protected Li anode exhibits excellent electrochemical stability during the Li stripping/plating process and leads to a relatively uniform and featureless surface in LOB after cycling. Our research demonstrates that superior electrochemical performance can be achieved in the Li–O2 battery with the synergistic combination of the DMSO-based electrolyte, the LiI redox mediator, and the Li3PO4-protected Li anode. The LOB with a Li3PO4-protected Li anode exhibits a prolonged cycling life span of 152 cycles with a fixed capacity of 1000 mA h g–1 at 2 A g–1. The results in this work provide knowledge for the ...
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- 2018
14. Stable Lithium Anode of Li-O
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Huanhuan, Guo, Guangmei, Hou, Linna, Dai, Yuqing, Yao, Chuanliang, Wei, Zhen, Liang, Pengchao, Si, and Lijie, Ci
- Abstract
Rechargeable Li-air (O
- Published
- 2019
15. Nanostructured LiMn2O4 composite as high-rate cathode for high performance aqueous Li-ion hybrid supercapacitors
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Qing Ai, Long Chen, Lin Zhang, Guangmei Hou, Xiaoxin Ma, Jinkui Feng, Pengchao Si, Lina Chen, Wei Zhai, Lijie Ci, Deping Li, and Xiaoyan Xu
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Supercapacitor ,Aqueous solution ,Materials science ,Renewable Energy, Sustainability and the Environment ,Spinel ,Composite number ,Energy Engineering and Power Technology ,02 engineering and technology ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Capacitance ,Cathode ,0104 chemical sciences ,law.invention ,Chemical engineering ,law ,engineering ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Current density - Abstract
Nanostructured spinel LiMn2O4 and super P composite with much enhanced electrochemical performance especially ultrahigh rate capability as the cathode for aqueous hybrid supercapacitors is synthesized by ball milling commercial LiMn2O4 particles together with super P. The as-prepared composite delivers a high capacitance of 306 F g−1 at the current density of 1 A g−1 and superb rate ability of 228.6 F g−1 at 40 A g−1 in 1 M Li2SO4 aqueous electrolyte. The capacitance of the nanostructured composite is 3.5 times higher than that of pristine LiMn2O4 even being charged and discharged 80 times faster. The excellent performances are ascribed to the nanosized LiMn2O4 well dispersed into the conductive carbon matrix. LiMn2O4 and super P composite//active carbon hybrid supercapacitor is assembled and the energy density can reach up to 21.58 Wh kg−1 at 293.16 W kg−1 and 13 Wh kg−1 at 5200 W kg−1. The hybrid device also shows an excellent cycling performance, which retains 85% of the initial capacitance after 4500 cycles. This work provides an effectively facile way to produce high performance LiMn2O4-based cathodes for hybrid suercapacitors in practical applications.
- Published
- 2018
16. Li7P3S11 solid electrolyte coating silicon for high-performance lithium-ion batteries
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Jinghua Chen, Lu Pan, Guangmei Hou, Yongling An, Xiaoyan Xu, Pengchao Si, Qing Ai, Lin Zhang, Xiaoxin Ma, Jinkui Feng, Lijie Ci, Jun Lou, and Wei Zhai
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Materials science ,Silicon ,General Chemical Engineering ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,engineering.material ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Lithium-ion battery ,0104 chemical sciences ,Anode ,Coating ,Chemical engineering ,chemistry ,engineering ,Lithium ,0210 nano-technology ,Layer (electronics) - Abstract
Li7P3S11 (LPS) solid electrolyte (SE) can be used as a coating layer for Si anode as the next generation high energy storage anode material for lithium ion battery (LIB). In this paper, a thin LPS SE was designed to coat on the Si nanoparticles surface to form a core-shell structure by a facile liquid-phase in-situ reaction method. The LPS shell can address the volume expansion of silicon anode successfully during lithiation and delithiation processes. Moreover, it leads to enhancement of the electrochemical performance for Si anode with excellent cycling stability and rate ability. The LPS SE coating is expected to be a promising strategy for other lithium-ion batteries anodes.
- Published
- 2018
17. Aluminum/graphene composites with enhanced heat-dissipation properties by in-situ reduction of graphene oxide on aluminum particles
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Qing Ai, Pengchao Si, Jinkui Feng, Le Zhang, Guangmei Hou, Lin Zhang, Lijie Ci, and Wei Zhai
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Materials science ,Graphene ,Mechanical Engineering ,Metals and Alloys ,Oxide ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Heat capacity ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Compressive strength ,Thermal conductivity ,chemistry ,Mechanics of Materials ,Aluminium ,law ,Powder metallurgy ,Materials Chemistry ,Composite material ,0210 nano-technology ,Dispersion (chemistry) - Abstract
Aluminum/graphene (Al/G) composites with enhanced heat-dissipation and mechanical properties were prepared by the powder metallurgy (P/M) technique. Graphene was first uniformly coated on the surface of micro-sized aluminum (Al) powders by an in-situ reduction reaction of GO and Al. Al/G bulk composites with uniform graphene dispersion in Al matrix were fabricated by the simple conventional P/M technique. Enhancements of 15.4% in thermal conductivity, 9.1% in specific heat capacity, 21.1% in hardness, and 25.6% in compressive strength were achieved with only 0.3 wt% graphene addition into pure Al.
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- 2018
18. Lithium Dendrite Suppression and Enhanced Interfacial Compatibility Enabled by an Ex Situ SEI on Li Anode for LAGP-Based All-Solid-State Batteries
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Qing Ai, Pengchao Si, Qidi Sun, Jinghua Chen, Xu Zhibin, Lina Chen, Fei Ding, Xiaoyan Xu, Li Yang, Guangmei Hou, Zhong Hai, Lin Zhang, Deping Li, Lijie Ci, Xiaoxin Ma, and Jinkui Feng
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Materials science ,Ethylene oxide ,Composite number ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,Metal ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,visual_art ,visual_art.visual_art_medium ,General Materials Science ,0210 nano-technology ,Polarization (electrochemistry) ,Current density - Abstract
The electrode–electrolyte interface stability is a critical factor influencing cycle performance of All-solid-state lithium batteries (ASSLBs). Here, we propose a LiF- and Li3N-enriched artificial solid state electrolyte interphase (SEI) protective layer on metallic lithium (Li). The SEI layer can stabilize metallic Li anode and improve the interface compatibility at the Li anode side in ASSLBs. We also developed a Li1.5Al0.5Ge1.5(PO4)3–poly(ethylene oxide) (LAGP-PEO) concrete structured composite solid electrolyte. The symmetric Li/LAGP-PEO/Li cells with SEI-protected Li anodes have been stably cycled with small polarization at a current density of 0.05 mA cm–2 at 50 °C for nearly 400 h. ASSLB-based on SEI-protected Li anode, LAGP-PEO electrolyte, and LiFePO4 (LFP) cathode exhibits excellent cyclic stability with an initial discharge capacity of 147.2 mA h g–1 and a retention of 96% after 200 cycles.
- Published
- 2018
19. High-performance red phosphorus/carbon nanofibers/graphene free-standing paper anode for sodium ion batteries
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Jun Lou, Pengchao Si, Qing Ai, Guangmei Hou, Lijie Ci, Lina Chen, Xiaohua Ren, Beibei Liu, Xiaoxin Ma, Jinkui Feng, Le Zhang, Lin Zhang, and Long Chen
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Battery (electricity) ,Materials science ,Renewable Energy, Sustainability and the Environment ,Carbon nanofiber ,Graphene ,Phosphorus ,Oxide ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Electrospinning ,0104 chemical sciences ,Anode ,law.invention ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,law ,Electrode ,General Materials Science ,0210 nano-technology - Abstract
Red phosphorus (P) has been regarded as an attractive anode material in a sodium-ion battery (SIB) due to its natural abundance and higher theoretical specific capacity. We developed a novel flexible P/carbon nanofibers@reduced graphene oxide (P/CFs@RGO) electrode for sodium-ion batteries through simple vapor-redistribution and electrospinning. In this multi-layer structured P/CFs@RGO electrode, the large volume changes of the red P layer during cycling can be easily buffered and the loss of P from carbon fibers is prevented. In addition, the electrodes have better electron transport. As the result, the as-prepared P/CFs@RGO electrode delivers a high capacity retention of 725.9 mA h g−1 after 55 cycles at 50 mA g−1 and a significant capacity of 406.6 mA h g−1 even at large current densities of 1000 mA g−1 after 180 cycles.
- Published
- 2018
20. An electrolyte with lithium dendrites suppression for high temperature operability
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Guangmei Hou, Devashish Salpekar, Bhuvaneswari Dharmarajan, Pulickel M. Ajayan, Babu Ganguli, and Anand B. Puthirath
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chemistry.chemical_classification ,Materials science ,Salt (chemistry) ,chemistry.chemical_element ,02 engineering and technology ,Electrolyte ,Internal resistance ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Propylene carbonate ,Ionic conductivity ,General Materials Science ,Lithium ,0210 nano-technology ,Boron - Abstract
The state-of-art Li-ion batteries have revolutionized the portable electronic industry and first-generation electric vehicles due to their high energy density at ambient temperatures. Owing to catastrophic failures under heat, these power devices are incompatible for applications such as in defence arsenals, subsurface drilling, space exploration and medical appliances, where performance at high-temperatures are as critical. Herein, we report an electrolyte formulation consists of Lithium bis(oxalato)borate (LiBOB) salt dissolved in propylene carbonate that enables lithium batteries to operate at extended temperature regime (>100 °C). The fundamental characterization of electrolyte system such as ionic conductivity, and internal resistance with respect to temperature promising for desired applications. Further, the electrolyte system is used to fabricate lithium batteries and the observed electrochemical results and lithium dendrites suppression capability confirmed its suitability for extended temperature applications without compromising ambient temperature performance.
- Published
- 2021
21. A heart-coronary arteries structure of carbon nanofibers/graphene/silicon composite anode for high performance lithium ion batteries
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Pengchao Si, Qing Ai, Guangmei Hou, Lin Zhang, Xiaoxin Ma, Jinkui Feng, and Lijie Ci
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Materials science ,Silicon ,chemistry.chemical_element ,lcsh:Medicine ,02 engineering and technology ,Electrolyte ,010402 general chemistry ,01 natural sciences ,Article ,law.invention ,law ,lcsh:Science ,Multidisciplinary ,Graphene ,Carbon nanofiber ,lcsh:R ,021001 nanoscience & nanotechnology ,Electrospinning ,0104 chemical sciences ,Anode ,Chemical engineering ,chemistry ,Nanofiber ,Electrode ,lcsh:Q ,0210 nano-technology - Abstract
In an animal body, coronary arteries cover around the whole heart and supply the necessary oxygen and nutrition so that the heart muscle can survive as well as can pump blood in and out very efficiently. Inspired by this, we have designed a novel heart-coronary arteries structured electrode by electrospinning carbon nanofibers to cover active anode graphene/silicon particles. Electrospun high conductive nanofibers serve as veins and arteries to enhance the electron transportation and improve the electrochemical properties of the active “heart” particles. This flexible binder free carbon nanofibers/graphene/silicon electrode consists of millions of heart-coronary arteries cells. Besides, in the graphene/silicon “hearts”, graphene network improves the electrical conductivity of silicon nanopaticles, buffers the volume change of silicon, and prevents them from directly contacting with electrolyte. As expected, this novel composite electrode demonstrates excellent lithium storage performance with a 86.5% capacity retention after 200 cycles, along with a high rate performance with a 543 mAh g−1 capacity at the rate of 1000 mA g−1.
- Published
- 2017
22. Bifunctional In Situ Polymerized Interface for Stable LAGP‐Based Lithium Metal Batteries
- Author
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Zhen Zeng, Guangmei Hou, Wei Zhai, Lina Chen, Lijie Ci, and Shengnan Zhang
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In situ ,chemistry.chemical_compound ,Materials science ,Chemical engineering ,chemistry ,Polymerization ,Mechanics of Materials ,Interface (Java) ,Mechanical Engineering ,In situ polymerization ,Lithium metal ,Bifunctional - Published
- 2021
23. Lewis Acidity Organoboron‐Modified Li‐Rich Cathode Materials for High‐Performance Lithium‐Ion Batteries
- Author
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Xiangkun Nie, Deping Li, Zhou Xu, Lijie Ci, Guangmei Hou, Ying Qiao, Qing Sun, Yuanyuan Li, and Jianwei Li
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Materials science ,chemistry ,Mechanics of Materials ,law ,Mechanical Engineering ,Inorganic chemistry ,In situ reaction ,chemistry.chemical_element ,Lithium ,Cathode ,Ion ,law.invention - Published
- 2021
24. High performance hierarchically nanostructured graphene oxide/covalent organic framework hybrid membranes for stable organic solvent nanofiltration
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Qiyi Fang, Qing Ai, Lijie Ci, Qilin Li, Weipeng Wang, Jun Lou, Long Chen, Guangmei Hou, and Kuichang Zuo
- Subjects
Materials science ,Graphene ,Oxide ,Nanoparticle ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,law.invention ,Solvent ,chemistry.chemical_compound ,Nanopore ,Membrane ,chemistry ,Chemical engineering ,law ,General Materials Science ,Nanofiltration ,0210 nano-technology ,Covalent organic framework - Abstract
Stable nanofiltration membranes with excellent tolerance to organic solvents and harsh chemical environment are in high demand from petrochemical, pharmaceutical and oil refinery industries. As promising nanofiltration membrane candidates, graphene oxide lamellar membranes suffer from poor flux as well as instability under practical application conditions. Incorporating additional nanopores were believed to be an effective way to improve solvent transportation while enabling efficient molecular sieving. Herein, as a proof of concept, we designed and prepared a hierarchically nanostructured (i.e. with nanopores, micropores, mesopores) graphene oxide/covalent organic framework (GO/COF) hybrid membrane by intercalating imine-based COF nanoparticles. The imine-based COF nanoparticles with inside hollow structure and in-plane nanopores (1.8 nm) as well as abundant edge functional groups become superhydrophilic, providing additional fast transport nanochannels for water and organic solvents molecules in GO matrix. The hierarchically nanostructured GO/COF hybrid membrane shows excellent water (59 L m − 2 h − 1 bar−1) and organic solvents (60 and 51 L m − 2 h − 1 bar−1 of methanol and ethanol, respectively) permeate flux at 1 bar and superior organic dyes rejection rates for Methylene blue (320 g/mol) and Congo red (697 g/mol) in ethanol solvent of 99% and 99.82%, respectively. Additionally, intercalating COF could greatly reduce the GO matrix swelling to enhance membrane stability upon exposure to water as well as strong acidic/base solution, enabling a high filtration performance during long-term (48 h) operation.
- Published
- 2020
25. Facile construction of a hybrid artificial protective layer for stable lithium metal anode
- Author
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Ganguli Babu, Guangmei Hou, Robert Vajtai, Lijie Ci, Qing Ai, Caleb Ci, Samuel Castro Pardo, Pulickel M. Ajayan, Keiko Kato, Huanhuan Guo, Anand B. Puthirath, Long Chen, Devashish Salpekar, Qidi Sun, Xiang Zhang, and Jun Cheng
- Subjects
Materials science ,General Chemical Engineering ,02 engineering and technology ,General Chemistry ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Industrial and Manufacturing Engineering ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,Metal ,Dendrite (crystal) ,Chemical engineering ,law ,visual_art ,visual_art.visual_art_medium ,Environmental Chemistry ,Lithium metal ,0210 nano-technology ,Polarization (electrochemistry) ,Electrochemical potential - Abstract
Lithium metal is considered as the ultimate anode for next-generation rechargeable batteries due to its high theoretical specific capacity and low electrochemical potential. However, the commercial application of lithium anode is hampered by its dendritic growth during the charging process resulted from the unstable lithium/electrolyte interface. Herein, we demonstrate the formation of a hybrid protective layer consists of LixAl, LiCl and organics on the lithium anode surface. This stable hybrid layer facilitates uniform distribution of Li-ion to eliminate the surface inhomogeneity and thus suppress the dendrite formation. As a result, the modified metallic lithium anode realizes long-term stable cycling with a minimal polarization at 1 mA cm−2 for 1000 h. Furthermore, cells with protected lithium as anode and LiFePO4 as cathode were cycled up to 600 cycles at a 1 C rate with higher capacity retention. This work presents an effective way to regulate a stable lithium anode-electrolyte interface with the formation of a hybrid artificial protective layer to advance lithium metal batteries, which may provide good references for the practical application of Li metal batteries.
- Published
- 2020
26. Stable lithium metal anode enabled by an artificial multi-phase composite protective film
- Author
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Guangmei Hou, Devashish Salpekar, Pulickel M. Ajayan, Pengchao Si, Jun Cheng, Xiang Zhang, Long Chen, Caleb Ci, Lijie Ci, Robert Vajtai, Qing Ai, Qiong Chen, Huanhuan Guo, Ganguli Babu, and Keiko Kato
- Subjects
Materials science ,Renewable Energy, Sustainability and the Environment ,Composite number ,Energy Engineering and Power Technology ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Cathode ,0104 chemical sciences ,Anode ,law.invention ,chemistry ,Chemical engineering ,law ,Ionic conductivity ,Lithium ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,0210 nano-technology ,Layer (electronics) ,Electrochemical potential - Abstract
High theoretical specific capacity and low electrochemical potential offered by lithium metal make it the definitive anode material for lithium batteries. Yet, unrelenting growth of dendrites forestalls the use of Li metal anode in commercial applications. To overcome this issue, we demonstrate the formation of a multi-phase composite protective layer consists of LixSi alloy, Si-linked organic oligomers and LiCl on the lithium anode surface. Due to its inherent ionic conductivity and chemical stability, the composite film can not only inhibit the formation of lithium dendrites by facilitating uniform Li-ion distribution, but also prevent unfavorable side reactions. The improved electrochemical performance is demonstrated by symmetric cells with the composite layer cycling at 1 mA cm−2 stably for 2200 h. Protected lithium anode coupled with LiFePO4 achieves high rate performance and better capacity retention after 400 cycles at 1C. Furthermore, cells with protected lithium anode and Li4Ti5O12 cathode (high areal loading of 14.9 mg cm−2) shows 91% capacity retention after 400 cycles at 0.5 C. The effective and scalable way to stabilize lithium anode with the multi-phase composite protective layer may serve as good references for development of advanced lithium metal batteries.
- Published
- 2020
27. Cold-pressing PEO/LAGP composite electrolyte for integrated all-solid-state lithium metal battery
- Author
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Jun Cheng, Guangmei Hou, Lijie Ci, Xiaoyan Xu, Jianguang Guo, Deping Li, Zhen Zeng, Xiangkun Nie, Pengchao Si, Qing Sun, Linna Dai, and Zhen Liang
- Subjects
chemistry.chemical_classification ,Battery (electricity) ,Pressing ,Materials science ,Composite number ,02 engineering and technology ,General Chemistry ,Polymer ,Electrolyte ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Casting ,0104 chemical sciences ,chemistry ,Chemical engineering ,Fast ion conductor ,Ionic conductivity ,General Materials Science ,0210 nano-technology - Abstract
Polyethylene-oxide (PEO)-based electrolyte is one of the most promising solid electrolytes due to its outstanding safety and excellent flexibility. However, the most common method to fabricate PEO-based electrolyte is casting, which requires intensive use of toxic organic solvent. Besides, the agglomeration of filler in the composite electrolyte fabricated by casting limits further enhancement of ionic conductivity. In this work, we provide a facile solvent-free cold-pressing method to prepare well-dispersed LAGP @ PEO composite solid-state electrolyte. The ionic conductivity of LAGP @ PEO composite electrolyte can reach about 4.4 × 10−5 S cm−1 at room temperature which is nearly one order of magnitude higher than that of the casting one (3.3 × 10−6 S cm−1). The integrated all-solid-state batteries display excellent cycling stability and good rate performance at 50 °C. Our work provides a facile solvent-free cold-pressing method to fabricate polymer-based composite electrolyte with well-dispersed filler for all-solid-state batteries.
- Published
- 2020
28. Synergistic double-shell coating of graphene and Li 4 SiO 4 on silicon for high performance lithium-ion battery application
- Author
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Qing Ai, Lina Chen, Pengchao Si, Deping Li, Xiaoxin Ma, Jinkui Feng, Lijie Ci, Wei Zhai, Long Chen, Peng Zhou, Lin Zhang, Xiaoyan Xu, Qijin Chi, and Guangmei Hou
- Subjects
Materials science ,Silicon ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,010402 general chemistry ,01 natural sciences ,Lithium-ion battery ,law.invention ,Coating ,law ,Materials Chemistry ,Ionic conductivity ,SDG 7 - Affordable and Clean Energy ,Electrical and Electronic Engineering ,Graphene ,Mechanical Engineering ,General Chemistry ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Electronic, Optical and Magnetic Materials ,Anode ,chemistry ,Chemical engineering ,engineering ,Lithium ,0210 nano-technology ,Faraday efficiency - Abstract
We demonstrate that the double-shell coating of graphene and Li4SiO4 on commercial Si nanoparticles as an effective strategy for improving the anode of lithium ion batteries to overcome the two critical concerns, i.e. rapid capacity decay and inferior coulombic efficiency caused by the large-volume changes. It is proven that the double-shell coating enables the formation of a stable hybrid solid electrolyte interphase, leading to much higher coulombic efficiency and longer cycling stability of the Si anodes. Furthermore, the rate performance of Si is significantly enhanced by the outstanding electrical conductivity of inner graphene layers and the excellent ionic conductivity of Li4SiO4 out-shell. The overall results suggest that this new strategy holds promising perspectives in optimizing electrochemical performances of Si anodes, which should promote their practical applications for next-generation lithium ion batteries with increasingly demanded energy density.
- Published
- 2018
29. Spontaneous In Situ Surface Alloying of Li-Zn Derived from a Novel Zn2+-Containing Solid Polymer Electrolyte for Steady Cycling of Li Metal Battery.
- Author
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Zhen Zeng, Shang Wang, Jun Cheng, Guangmei Hou, Deping Li, Guifang Han, and Lijie Ci
- Published
- 2021
- Full Text
- View/download PDF
30. Artificial Solid Electrolyte Interphase Coating to Reduce Lithium Trapping in Silicon Anode for High Performance Lithium‐Ion Batteries
- Author
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Xiaoyan Xu, Qing Ai, Jinkui Feng, Pengchao Si, Wei Zhai, Guangmei Hou, Qing Sun, Lijie Ci, Qidi Sun, Jun Lou, Deping Li, Lin Zhang, and Jianguang Guo
- Subjects
Materials science ,Mechanical Engineering ,chemistry.chemical_element ,Silicon anode ,Electrolyte ,Trapping ,engineering.material ,Ion ,Coating ,chemistry ,Chemical engineering ,Mechanics of Materials ,engineering ,Lithium ,Interphase - Published
- 2019
31. Sandwich-Like FeCl3 @C as High-Performance Anode Materials for Potassium-Ion Batteries
- Author
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Pengchao Si, Qing Sun, Deping Li, Min Zhu, Guangmei Hou, Lina Chen, Zhen Liang, Long Chen, Yang Liu, Jinkui Feng, Lin Zhang, Lijie Ci, Jun Lou, Qing Ai, Shirui Guo, and Wei Zhai
- Subjects
Materials science ,Mechanical Engineering ,Potassium ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Anode ,Sandwich like ,Chemical engineering ,chemistry ,Mechanics of Materials ,0210 nano-technology - Published
- 2018
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