Polymeric concentrated electrolyte enables simultaneous stabilization of electrode/electrolyte interphases for quasi‐solid‐state lithium metal batteries
Guanming Yang,
Wangshu Hou,
Yanfang Zhai,
Zongyuan Chen,
Chengyong Liu,
Chuying Ouyang,
Xiao Liang,
Peerasak Paoprasert,
Ning Hu,
Shufeng Song
Affiliations
Guanming Yang
College of Aerospace Engineering Chongqing University Chongqing China
Wangshu Hou
College of Aerospace Engineering Chongqing University Chongqing China
Yanfang Zhai
College of Aerospace Engineering Chongqing University Chongqing China
Zongyuan Chen
College of Aerospace Engineering Chongqing University Chongqing China
Chengyong Liu
Fujian Science & Technology Innovation Laboratory for Energy Devices of China (21C‐LAB) Ningde Fujian China
Chuying Ouyang
Fujian Science & Technology Innovation Laboratory for Energy Devices of China (21C‐LAB) Ningde Fujian China
Xiao Liang
College of Chemistry and Chemical Engineering Hunan University Changsha Hunan China
Peerasak Paoprasert
Department of Chemistry, Faculty of Science and Technology Thammasat University Pathum Thani Thailand
Ning Hu
State Key Laboratory of Reliability and Intelligence Electrical Equipment, National Engineering Research Center for Technological Innovation Method and Tool, and School of Mechanical Engineering Hebei University of Technology Tianjin China
Shufeng Song
College of Aerospace Engineering Chongqing University Chongqing China
Abstract To achieve next‐generation lithium metal batteries (LMBs) with desirable specific energy and reliability, the electrolyte shown simultaneously high reductive stability toward lithium metal anode and oxidative stability toward high‐voltage cathode is of great importance. Here, we report for the first time that high‐concentration lithium bis(fluorosulfonyl)imide (LiFSI) initiates ring‐opening polymerization of 1,3‐dioxolane in presence of ethylene carbonate and ethylmethyl carbonate to produce in‐situ a novel polymeric concentrated quasi‐solid electrolyte (poly‐CQSE). The unique poly‐CQSE with 10 M LiFSI forms a mixed‐lithiophobic‐conductive LiF‐Li3N solid electrolyte interphase on lithium metal anode, and a F‐rich conformal cathode electrolyte interphase on LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode simultaneously. As a result, the poly‐CQSE not only enables stable Li plating/stripping of metallic Li anode at a sound Coulombic efficiency of 95.3% without dendrite growth, but also enables a stable cycling of the Li||NCM523 quasi‐solid‐state LMB at a capacity retention of 94% over 100 cycles.
