In-situ polymerized carbonate induced by Li-Ga alloy as novel artificial interphase on Li metal anode |
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| Institution: | 1. School of Chemistry, Northeast Normal University, Changchun 130024, China;2. Center for Lignocellulosic Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China;3. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China;2. Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang 441053, China;3. Institute of Chemistry, Free University of Berlin, Arnimallee 22, Berlin D-14195, Germany;4. Hubei Longzhong Laboratory, Xiangyang 441000, China;5. Institute of Environment and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;6. School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China;2. Department of Chemistry, Hong Kong Baptist University, Hong Kong, China;3. Department of Chemistry, City University of Hong Kong, Hong Kong, China;4. Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515063, China;1. The MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;3. Nuclear Research Institute for Future Technology and Policy, Seoul National University, Seoul 08826, Republic of Korea;1. Henan Provincial People''s Hospital, People''s Hospital of Zhengzhou University, Zhengzhou 450003, China;2. College of Chemistry and Chemical Engineering, Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, China;3. Luoyang Key Laboratory of Organic Functional Molecules, College of Food and Drug, Luoyang Normal University, Luoyang 471934, China;4. Institute of Advanced Materials (IAM) and Key Laboratory of Flexible Electronics (KLoFE), Nanjing Tech University (NanjingTech), Nanjing 211816, China;5. Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China;6. Department of Chemistry and Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong 999077, China;7. Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China;8. Pharmaceutical Sciences Laboratory, Åbo Akademi University, Turku 20520, Finland |
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| Abstract: | Li metal is considered an ideal anode material because of its high theoretical capacity and low electrode potential. However, the practical usage of Li metal as an anode is severely limited because of inevitable parasitic side reactions with electrolyte and dendrites formation. At present, single-component artificial solid electrolyte interphase cannot simultaneously meet the multiple functions of promoting ion conduction, guiding lithium ion deposition, inhibiting dendrite growth, and reducing interface side reactions. Therefore, multi-component design on Li metal surface is widely investigated to achieve long-term cycling. Herein, we report a Li2Ga-carbonate polymer interphase layer to solve volume changes, Li dendrites formation and side-reactions. As a result, the Li symmetric cell can be stabilized at 3.0 mA/cm2 in carbonate electrolyte with limited volume of 20 µL. Coupled with 13.6 mg/cm2 (loading of 2 mAh/cm2) LiFePO4 cathode, discharge capacity retains at 90% for over 150 cycles under limited electrolyte conditions. With such an alloy-polymer interphase layer, higher energy density Li metal batteries become prominent in the near future. |
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