固态锂金属电池中原位聚合电解质的研究进展  

Research Progresses of in situ Polymerized Electrolytes for Solid-state Lithium Metal Batteries

作　　者：徐攀 孔伟进 黄雪妍 孙硕 黄文泽 赵辰孜 XU Pan;KONG Weijin;HUANG Xueyan;SUN Shuo;HUANG Wenze;ZHAO Chenzi(Department of Chemical Engineering,Tsinghua University,Beijing 100084,China;School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学化学工程系,北京100084 [2]清华大学车辆与运载学院,北京100084

出　　处：《高等学校化学学报》2023年第5期49-60,共12页Chemical Journal of Chinese Universities

基　　金：国家重点研发计划项目(批准号:2021YFB2500300)资助。

摘　　要：在下一代电池体系中,固态金属锂电池具有高能量密度潜力,同时有望避免目前电池面临的燃烧、爆炸等安全隐患.其中,固态电解质和电极材料之间的固-固界面接触差是其实用化面临的重要挑战.近年来,经电池内部原位聚合反应制得的原位聚合电解质用于固态锂金属电池具备界面一体化提升固-固界面相容性、抑制枝晶的形成、抑制正极过渡金属离子/多硫化物/氧化还原介质的溶解/穿梭并提升电池电化学性能多种优势.本文首先讨论了聚合电解质的反应机理,然后分析了电池内部常见电解质的原位聚合原理,总结了固态锂金属电池中原位聚合电解质的最新研究进展.最后,对未来原位聚合电解质的发展方向和商业化应用进行了展望.In the next-generation battery systems,solid-state lithium metal batteries possesses high energy density,which are also expected to avoid the potential safety issues such as combustion and explosion faced by current commercial batteries.However,the poor solid-solid contacts between solid-state electrolytes and electrodes are crucial challenges to hinder their practical applications.In recent years,the in situ polymerized electrolytes prepared by the in situ polymerization reactions inside the battery have multiple advantages for solid-state lithium metal batteries,including improved solid-solid interface compatibility via interface integration,Li dendrite suppression,inhibited dissolution/shuttle of cathode transition metal ions/polysulfides/redox mediators and enhanced electrochemical performances.This review firstly discusses the reaction mechanism of polymerized electrolytes,and then analyzes the state-of-the-art in situ polymerized electrolytes.Furthermore,the recent research progresses of in situ polymerized electrolytes in solid-state lithium metal batteries is summarized,emphasizing the important roles in the battery cycling.Finally,the conclusion and future prospects on the commercial application of in situ polymerized electrolytes are presented.

关 键 词：固态锂金属电池 原位聚合 固态电解质 固-固界面 

分 类 号：O646[理学—物理化学]