AgTFSI Pretreated Li Anode in LiI-Mediated Li-O_(2)Battery:Enabling Lithiophilic Solid Electrolyte Interphase Generation to Suppress the Redox Shuttling  

作　　者：Yuqing Zhang Qian Chen Dan Li Shuang Qi Yulong Liu Jia Liu Haiming Xie Jiefang Zhu 

机构地区：[1]Nation&Local United Engineering Laboratory for Power Batteries,Faculty of Chemistry,Northeast Normal University,Changchun 130024 [2]Jilin Province Dongchi New Energy Technology Co.,Ltd.,Changchun 130000 [3]Department of Chemistry-Ångström Laboratory,Uppsala University,Uppsala 75121 [4]The Key Laboratory for Ultrafine Materials of The Ministry of Education,East China University of Science and Technology,Shanghai 200237

出　　处：《CCS Chemistry》2024年第10期2400-2410,共11页中国化学会会刊（英文）

基　　金：supported by Science and Technology Project of Jilin Provincial Education Department(grant no.JJKH20221160KJ);Jilin Province Science and Technology Department(grant no.20230402059GH);The Swedish Foundation for International Cooperation in Research and Higher Education(grant no.KO2017-7351);Swedish Energy Agency(Project no.P2020-90216).

摘　　要：Although lithium iodide(LiI)as a redox mediator(RM)can decrease the overpotential in Li-O_(2)batteries,the stability of the Li anode is still one critical issue due to the redox shuttling.Here,we firstly present a novel approach for generating Ag and LiTFSI enriched Li anode(designated as ALE@Li anode)via a spontaneous substitution between pure Li and bis(trifluoromethanesulfonyl)imide silver,in a LiI-participated Li-O_(2)cell.It can induce the generation of a lithiophilic solid electrolyte interphase(SEI)enriched with Ag,F,and N species(e.g.,Ag_(2)O,Li-Ag alloy,LiF,and Li_(3)N)during cell operation,which contributes to promoting the electrochemical performance through the shuttling inhibition.Compared to a cell with a bare Li anode,the one with as-prepared ALE@Li anode shows an enhanced cyclability,a considerable rate capability,and a good reversibility.In addition,a synchrotron X-ray computed tomography technique is employed to investigate the inhibition mechanism for shuttling effect by monitoring the morphological evolution on the cell interfaces.Therefore,this work highlights the deliberate design in the modified Li anode in an easy-to-operate and cost-effective way as well as providing guidance for the construction of artificial SEI layers to suppress the redox shuttling of RMs in Li-O_(2)batteries.

关 键 词：redox shuttling modified Li anode artificial SEI layer synchrotron X-ray computed tomography Li-O_(2)batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]