锂金属电池中复合固态电解质与负极界面的研究进展  

Research progress on interface of solid composite electrolyte and anode in lithium-metal batteries

作　　者：朱晓琪 葛性波[1] 张格非 王凯[2] 马衍伟[2] ZHU Xiao-qi;GE Xing-bo;ZHANG Ge-fei;WANG Kai;MA Yan-wei(School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]西南石油大学化学化工学院,成都610500 [2]中国科学院电工研究所,北京100190

出　　处：《材料工程》2021年第6期33-43,共11页Journal of Materials Engineering

基　　金：国家自然科学基金(51822706,51777200);北京市杰出青年科学基金(JQ19012);中科院大连洁净能源研究院合作基金(DNL201912)。

摘　　要：与传统锂离子电池相比,全固态锂金属电池因其安全性好、能量密度高的特点备受关注。但是电极与固态电解质的固固接触带来较大的界面阻抗,而锂金属较为活泼易与固态电解质发生反应,造成了界面不稳定。界面问题已经成为制约全固态电池发展的关键因素之一。有机-无机复合固态电解质兼顾无机固态电解质和有机固态电解质的优势,具有较高离子电导率和一定的力学强度,展现出优异的实用化前景。本文综述了近年来复合固态电解质与金属锂负极界面改性的研究进展,总结了当前界面改性的主要研究思路:包括在界面构筑“软接触”、调节固态电解质的力学性能以及调控界面处锂离子的沉积动力学过程等。同时,也对今后界面改性的研究趋势进行了展望。Compared with traditional lithium-ion batteries,all-solid-state lithium-metal batteries(ASS LMBs)have attracted much attention due to their high safety and high energy density.However,the solid-solid contact of electrodes with solid electrolyte brings large interfacial impedance.Besides,the active lithium metal reacts with most solid electrolytes,leading to unstable interface.So interfacial problem has been one of the key issues to limit the development of ASS LMBs.Solid composite electrolytes with the advantages of inorganic solid electrolytes and organic solid electrolytes,have higher ionic conductivity and certain mechanical strength,showing excellent promising in the light of practical application.The research progress on interface amelioration of solid composite electrolyte and lithium anode was summalized in this review.The main strategy includes constructing a“soft contact”at the interface,adjusting the mechanical performance of the solid electrolyte and tuning the deposition dynamics of lithium ions.Furthermore,the perspectives on interfacial modification were presented.

关 键 词：全固态电池 锂金属 复合固态电解质 界面 锂枝晶 

分 类 号：Q646.21[生物学—生物物理学]