Stable Cycling of All-Solid-State Lithium Metal Batteries Enabled by Salt Engineering of PEO-Based Polymer Electrolytes

作     者：Lujuan Liu Tong Wang Li Sun Tinglu Song Hao Yan Chunli Li Daobin Mu Jincheng Zheng Yang Dai Lujuan Liu;Tong Wang;Li Sun;Tinglu Song;Hao Yan;Chunli Li;Daobin Mu;Jincheng Zheng;Yang Dai

作者机构：Department of Chemical EngineeringShanghai UniversityShangda Road 99Shanghai 200444China School of Material Science&EngineeringBeijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of PhysicsXiamen UniversityXiamen 361005China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2024年第7卷第2期

页      面：67-74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）] 080502[工学-材料学] 

基　　金：supported by National Natural Science Foundation of China(Grant No.U1930113),China National Natural Science Foundation of China(52072036) 

主　　题：all-solid-state battery high voltage li-ion conductivity molecular interaction poly(ethylene oxide) 

摘      要：Poly(ethylene oxide)(PEO)-based polymer electrolytes show the prospect in all-solid-state lithium metal batteries;however,they present limitations of low room-temperature ionic conductivity,and interfacial incompatibility with high voltage ***,a salt engineering of 1,1,2,2,3,3-hexafluoropropane-1,3-disulfonimide lithium salt(LiHFDF)/LiTFSI system was developed in PEO-based electrolyte,demonstrating to effectively regulate Li ion transport and improve the interfacial stability under high *** show,by manipulating the interaction between PEO matrix and TFSI^(-)-HFDF^(-),the optimized solid-state polymer electrolyte achieves maximum Li+conduction of 1.24×10^(-4)S cm^(-1)at 40℃,which is almost 3 times of the ***,the optimized polymer electrolyte demonstrates outstanding stable cycling in the LiFePO_(4)/Li and LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)/Li(3.0-4.4 V,200 cycles)based all-solid-state lithium batteries at 40℃.