石榴石型固态电解质表界面问题及优化的研究进展  

Research progress of interface problems and optimization of garnet-type solid electrolyte

作　　者：张念 任国玺 章辉 周櫈 刘啸嵩 Zhang Nian;Ren Guo-Xi;Zhang Hui;Zhou Deng;Liu Xiao-Song(State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Tianmu Lake Institute of Advanced Energy Storage Technologies,Liyang 213300,China;School of Physical Science and Technology,Shanghai Tech University,Shanghai 201210,China)

机构地区：[1]中国科学院上海微系统与信息技术研究所,功能材料国家重点实验室,上海200050 [2]天目湖先进储能技术研究院,溧阳213300 [3]上海科技大学物质学院,上海201210

出　　处：《物理学报》2020年第22期218-227,共10页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11905283,U1632269,11227902);国家重点基础研究发展计划(批准号:2019YFA0405600)资助的课题。

摘　　要：随着对能源存储设备输出和安全性能等方面需求的不断提升,全固态电池展示了替代传统液态锂离子电池占据新能源市场的潜力.石榴石型Li7La3Zr2O(12)固体电解质具有高离子导率且对于锂金属稳定,是最受人瞩目的固体电解质材料之一.但是,固-固界面不良接触导致的巨大界面电阻以及由于锂的不均匀沉积和分解导致的锂枝晶生长等问题严重阻碍了全固态电池的发展.本综述针对石榴石型全固态电池突出的界面问题,详细论述了Li7La3Zr2O(12)表面碳酸锂问题的研究现状;讨论了锂金属负极和固态电解质的界面浸润性以及锂枝晶生长问题,给出了构建理想界面的关键因素;阐述了优化正极与石榴石型固体电解质界面的具体方法以及改善界面润湿性的思路.本文还展望了未来石榴石型全固态锂离子电池可能的发展方向,为全固态锂离子电池的发展和应用提供了借鉴.With the increasing demand for storage devices with higher energy output and better safety performance,all-solid-state batteries show their potential to replace the traditional liquid-based Li-ion batteries in the future storage market.Garnet-type Li7La3Zr2O12 is one of the most attractive solid electrolyte materials because of its high ionic conductivity and stability to lithium metal.However,the large interfacial resistance originating from the insufficient solid-solid contact and the penetration of the lithium dendrite due to the inhomogeneous dissolution and deposition of lithium,hinder the all-solid-state batteries from developing.Focusing on the main interfacial problems in garnet-type all-solid battery,this review provides a fundamental understanding of the Li2CO3 issues in Li7La3Zr2O12 solid electrolyte and addresses the key factors influencing Li/Li7La3Zr2O12/cathode interfacial wettability and the growth of Li dendrite,thus giving the key factors of constructing ideal interfaces.Finally,the possible research direction of garnet-type all-solid-state battery in the future is also prospected,which provides a guidance for developing and using all-solid-state batteries.

关 键 词：锂镧锆氧 全固态电池 界面修饰 表征技术 

分 类 号：TM912[电气工程—电力电子与电力传动]