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 

机构地区：[1]Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,People’s Republic of China [2]School of Materials Science and Engineering,Tsinghua University,Beijing 100084,People’s Republic of China [3]College of Materials Science and Engineering,Hunan University,Changsha 410082,People’s Republic of China

出　　处：《Nano-Micro Letters》2022年第9期147-159,共13页纳微快报（英文版）

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)。

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.

关 键 词：Electrostatic interaction Anion-rich solvation sheath High voltage Lithium metal batteries Wide temperature range 

分 类 号：TM912[电气工程—电力电子与电力传动]