硫化物固态电解质材料界面及其表征的研究进展  

Advance in interface and characterizations of sulfide solid electrolyte materials

作　　者：张桥保 龚正良 杨勇[3] Zhang Qiao-Bao;Gong Zheng-Liang;Yang Yong(College of Materials,Xiamen University,Xiamen 361005,China;College of Energy,Xiamen University,Xiamen 361005,China;State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学材料学院,厦门361005 [2]厦门大学能源学院,厦门361005 [3]厦门大学化学化工学院,固体表面物理化学国家重点实验室,厦门361005

出　　处：《物理学报》2020年第22期153-180,共28页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:52072323,21935009,21875196);国家重点研发计划(批准号:2018YFB0905400)资助的课题。

摘　　要：发展高能量密度和高安全性的全固态锂电池技术对于推动我国锂电池产业技术的更新换代,强化我国在这一领域的技术优势具有重要的现实意义.固态电解质是全固态锂电池的核心组成部分,其中硫化物固态电解质因其高的离子电导率、较好的机械延展性以及与电极良好的界面接触等优点,被认为是最具商业化潜力的固态电解质之一.然而其空气稳定性较差,与电极接触的界面存在界面副反应、锂枝晶生长及界面机械失效等缺点,严重制约了其在高能量密度全固态锂电池中的应用.本文首先综述硫化物固态电解质空气稳定性的研究方法及其退化机制、提高材料空气稳定性的策略与方法;其次对其与正负极界面的相容性、稳定性及其解决策略进行了总结与分析;最后总结归纳近年来电极/硫化物固态电解质界面的原位表征技术的研究进展,并展望了未来硫化物固态电解质材料界面的研究重点和发展方向.The development of high-energy density and high-safety all-solid-state lithium battery(ASSLB)technology has important practical significance for promoting the upgrading of lithium battery technology and the strengthening of technological development in this field.The solid electrolyte is a core component of the ASSLB.The sulfide solid electrolyte is regarded as one of the most promising solid electrolyte candidates for practical application in ASSLBs due to its high ionic conductivity,better mechanical ductility,and good interface contact with the electrode.However,its practical application is severely hampered by the issues of poor air stability and interface problems,including interface side reactions,lithium dendritic growth,and interface mechanical failure.In this review,we first summarize the research methods and degradation mechanisms of the air stability of sulfide solid electrolytes,and the strategies and methods to improve their air stability.Then,the electrochemical stability,interface compatibility and related interfacial modification strategies for sulfide electrolyte/electrode interface are summarized and discussed.Further,the research progress of in-situ characterization technologies for sulfide solid electrolyte/electrode interfaces in recent years is analyzed and summarized.Finally,an outlook on the future research and development of stable interfaces in sulfide solid electrolyte based ASSLBs is highlighted.

关 键 词：固态电池 硫化物固态电解质 空气稳定性 电极/电解质界面 原位表征技术 

分 类 号：TM912[电气工程—电力电子与电力传动]