Block Copolymer Solid Electrolytes Based on Comb-Like Poly(ethylene glycol)Plasticized Poly(ionic liquid)s for Lithium-Ion Batteries
作者机构：School of Materials Science and EngineeringTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300072 China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2023年第41卷第19期
页 面：2493-2501页
核心收录：
学科分类：0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(Grant No.52130307)
主 题：Solid polymer electrolytes Li-ion batteries Polymerized ionic liquids Poly(ethylene glycol) Block copolymers Electrostatic interactions
摘 要：Electrolytes based on poly(ionic liquid)s(PILs)have attracted great attention in the fields of next-generation solid lithium-ion ***,the low ionic conductivity prevents their practical ***,we report novel solid electrolytes based on block copolymers composed of PILs and comb-like poly(ethylene glycol)(PEG),which were synthesized via ring-opening metathesis polymerization of 3-(2-(bicyclo[2.2.1]hept-5-en-2-yl)ethyl)-1-butyl-1H-imidazol-3-ium bis((trifluoromethyl)sulfonyl)amide and poly(ethylene glycol monomethyl ether)bicyclo[2.2.1]***-like PEG acts as plasticizers in block copolymers dominated by PILs to promote the mobility of PILs *** of the copolymer composition and length of the comb-like PEG chain on ionic conductivity were *** optimized electrolyte delivers the highest ionic conductivity of 1.5×10^(–5)S·cm^(–1)at 30℃,and robust electrochemical stability up to 4.6 V.A solid-state Li/LiFePO4 cell using the optimized electrolyte demonstrates good cycle performance at 0.2 C with high capacity retention of 92%after 70 cycles at 50℃.
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