Trimethyl phosphate-enhanced polyvinyl carbonate polymer electrolyte with improved interfacial stability for solid-state lithium battery

作     者：Fei Zheng Hao-Tong Li Yan-Zhen Zheng Dan Wang Ning-Ning Yang Hai-Yang Ding Xia Tao Fei Zheng;Hao-Tong Li;Yan-Zhen Zheng;Dan Wang;Ning-Ning Yang;Hai-Yang Ding;Xia Tao

作者机构：Beijing Key Laboratory of Green Recovery and Extractionof Rare and Precious MetalsUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Organic-Inorganic CompositesBeijing University of Chemical TechnologyBeijing 100029China General Research Institute of Nonferrous MetalsBeijing 100088China China Automotive Battery Research Institute Co.Ltd.Beijing 101407China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第6期

页      面：1889-1898页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China (No.21676017) the Opening Project of State Key Laboratory of Advanced Chemical Power Sources (No.SKL-ACPS-C-27) the Opening Project of State Key Laboratory of Organic-Inorganic Composites 

主　　题：Trimethyl phosphate Solid polymer electrolyte Interface stability Compatibility Lithium ion battery 

摘      要：The polyvinyl carbonate(PVC)polymer solid electrolyte can be in-situ generated in the assembled lithium-ion battery(LIBs);however,its rigid characteristic leads to uneven interface contact between electrolyte and electrodes.In this work,trimethyl phosphate(TMP)is introduced into the precursor solution for in-situ generation of flexible PVC solid electrolyte to improve the interfacial contact of elec-trolyte and electrodes together with ionic conductivity.The PVC-TMP electrolyte exhibits good interface compatibility with the lithium metal anode,and the lithium symmetric battery based on PVC-TMP electrolyte shows no obvious polarization within 1000 h cycle.As a consequence,the initial interfacial resistance of battery greatly decreases from 278Ω(LiFePO_(4)(LFP)/PVC/Li)to 93Ω(LFP/PVC-TMP/Li)at 50℃,leading to an improved cycling stability of the LFP/PVC-TMP/Li battery.Such in-situ preparation of solid electrolyte within the battery is demonstrated to be very significant for commercial application.