Eutectic Solution Enables Powerful Click Reaction for In-Situ Construction of Advanced Gel Electrolytes

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外文摘要：Thiol-ene click reaction is an intriguing strategy for preparing polymer electrolytes due to its high activity,atom economy and less side reaction.However,the explosive reaction rate and the use of non-electrolytic amine catalyst hamper its application in in-situ batteries.Herein,a nitrogen-containing eutectic solution is designed as both the catalyst of the thiol-ene reaction and the plasticizer to in-situ synthesize the gel polymer electrolytes,realizing a mild in-situ gelation process and the preparation of high-performance gel electrolytes.The obtained gel polymer electrolytes exhibit a high ionic conductivity of 4 × 10-4 S cm-1 and lithium-ion transference number(tLi+)of 0.51 at 60 ℃.The as-assembled Li/LiFePO4(LFP)cell delivers a high initial discharge capacity of 155.9 mAh g-1,and a favorable cycling stability with the capacity retention of 82％after 800 cycles at 1 C is also obtained.In addition,this eutectic solution significantly improves the rate performance of the LFP cell with high specific capacity of 141.5 and 126.8 mAh g-1 at 5 C and 10 C,respectively,and the cell can steadily work at various charge-discharge rate for 200 cycles.This powerful and efficient strategy may provide a novel way for in-situ preparing gel polymer electrolytes with desirable comprehensive performances.

外文关键词：

eutectic solutionin-situ gelationlithium metal batterypolymer electrolytethiol-ene click reaction

作者：

Weixin Ye、Jirong Wang、Chi Zhang、Zhigang Xue

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作者单位：

Key Laboratory for Material Chemistry of Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering Huazhong University of Science and Technology,Wuhan 430074,China

基金：

National Natural Science Foundation of ChinaFellowship of China Postdoctoral Science Foundationanalytical and testing assistance from the Analysis and Testing Center of HUST

项目编号：

519730732021M701303

出版年：

2023

DOI：

10.1002/eem2.12579

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(4)

参考文献量49