Electrostatic Interaction Tailored Anion-Rich Solvation Sheath Stabilizing High-Voltage Lithium Metal Batteries

作     者：Junru Wu Ziyao Gao Yao Wang Xu Yang Qi Liu Dong Zhou Xianshu Wang Feiyu Kang Baohua Li Junru Wu;Ziyao Gao;Yao Wang;Xu Yang;Qi Liu;Dong Zhou;Xianshu Wang;Feiyu Kang;Baohua Li

作者机构：Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055People’s Republic of China School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China College of Materials Science and EngineeringHunan UniversityChangsha 410082People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2022年第14卷第9期

页      面：147-159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）] 0702[理学-物理学] 

基　　金：supported by National Nature Science Foundation of China(No.51872157 and No.52072208) National Key R&D Program of China 2021YFA1202802 Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01N111)。 

主　　题：Electrostatic interaction Anion-rich solvation sheath High voltage Lithium metal batteries Wide temperature range 

摘      要：Through tailoring interfacial chemistry,electrolyte engineering is a facile yet effective strategy for highperformance lithium(Li)metal batteries,where the solvation structure is critical for interfacial chemistry.Herein,the effect of electrostatic interaction on regulating an anion-rich solvation is firstly proposed.The moderate electrostatic interaction between anion and solvent promotes anion to enter the solvation sheath,inducing stable solid electrolyte interphase with fast Li+transport kinetics on the anode.This asdesigned electrolyte exhibits excellent compatibility with Li metal anode(a Li deposition/stripping Coulombic efficiency of 99.3%)and high-voltage LiCoO_(2) cathode.Consequently,the 50μm-thin Li||high-loading LiCoO_(2) cells achieve significantly improved cycling performance under stringent conditions of high voltage over 4.5 V,lean electrolyte,and wide temperature range(-20 to 60℃).This work inspires a groundbreaking strategy to manipulate the solvation structure through regulating the interactions of solvent and anion for highperformance Li metal batteries.