Electrolyte and current collector designs for stable lithium metal anodes

查看全文 作　　者：Simeng [1,2]Zhang;Gaojing [1,3]Yang;Xiaoyun [1,2]Li;Yejing [1,3]Li;Zhaoxiang [1,2,3]Wang;Liquan [1]Chen

机构地区：[1]Key Laboratory for Renewable Energy,Chinese Academy of Sciences,Beijing Key Laboratory for New Energy Materials and Devices,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;[2]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100190,China;[3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》索引2022年第29卷第5期,共12页

基　　金：financially supported by the National Natural Science Foundation of China(No.21773301)。 摘　　要：With the increasing demand for high energy-density batteries for portable electronics and large-scale energy storage systems,the lithium metal anode(LMA)has received tremendous attention because of its high theoretical capacity and low redox potential.However,the commercial application of LMAs is impeded by the uncontrolled growth of lithium dendrites.Such dendrite growth may result in internal short circuits,detrimental side reactions,and the formation of dead lithium.Therefore,the growth of lithium metal must be controlled.This article summarizes our recent efforts in inhibiting such dendrite growth,decreasing the detrimental side reactions,and elongating the LMA lifespan by optimizing the electrolyte structure and by designing appropriate current collectors.After identifying that the unstable solid electrolyte inter-face(SEI)film is responsible for the potential dropping in carbonate electrolytes,we developed LiPF_(6)-LiNO_(3) dual-salt electrolyte and lithium bis(fluorosulfonyl)imide(LiFSI)-carbonate electrolyte to stabilize the SEI film of LMAs.In addition,we achieved controlled lithium depos-ition by designing the structure and material of the current collectors,including selective lithium deposition in porous current collectors,lithio-philic metal guided lithium deposition,and iron carbide induced underpotential lithium deposition in nano-cavities.The limitations of the cur-rent strategies and prospects for future research are also presented. 关键词：lithium metal anode ELECTROLYTE current collector lithium dendrite solid electrolyte interface

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Electrolyte and current collector designs for stable lithium metal anodes

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