CIESC Journal ›› 2021, Vol. 72 ›› Issue (1): 61-70.DOI: 10.11949/0438-1157.20201201

• Reviews and monographs • Previous Articles     Next Articles

Recent advances in solid-state lithium metal batteries: the role of external pressure and internal stress

NAN Haoxiong1,2(),ZHAO Chenzi1,YUAN Hong3(),LU Yang1,SHEN Xin1,ZHU Gaolong1,4,LIU Quanbing2(),HUANG Jiaqi3,ZHANG Qiang1()   

  1. 1.Beijing Key Laboratory of Green Chemical Reaction Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
    2.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
    3.Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
    4.Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518000, Guangdong, China
  • Received:2020-08-21 Revised:2020-11-06 Online:2021-01-05 Published:2021-01-05
  • Contact: YUAN Hong,LIU Quanbing,ZHANG Qiang

固态金属锂电池研究进展:外部压力和内部应力的影响

南皓雄1,2(),赵辰孜1,袁洪3(),卢洋1,沈馨1,朱高龙1,4,刘全兵2(),黄佳琦3,张强1()   

  1. 1.清华大学化学工程系,绿色反应工程与工艺北京市重点实验室,北京 100084
    2.广东工业大学轻工化工学院,广东 广州 510006
    3.北京理工大学前沿交叉科学研究院,北京 100081
    4.深圳大学化学与化工学院功能高分子深圳市重点实验室,广东 深圳 518000
  • 通讯作者: 袁洪,刘全兵,张强
  • 作者简介:南皓雄(1986—),男,博士,讲师,nanhaoxiong@163.com
  • 基金资助:
    国家自然科学基金项目(21905056);国家重点研发计划项目(2016YFA0202500);北京市自然科学基金项目(Z200011)

Abstract:

The solid-state lithium metal battery has the advantages of high theoretical energy density and high safety, and is a very promising next-generation energy storage system. However, the limited solid–solid contact retards the migration of Li ions between solid electrolytes and electrodes. Consequently, applying external pressure is an effective route to enhance interfacial contacts and extend battery cycle life. At the same time, the internal stresses generated with the volume changes of electrodes during cycling will also hugely influence the interfacial contacts. In this paper, the mechanisms of external pressure and internal stresses on electrodes and electrolytes are reviewed by introducing two basic physical contact models and analyzing the physical properties of sulfide, oxide, polymer electrolytes and lithium metal anodes. Finally, the roles of external pressure and internal stresses in all-solid-state Li metal batteries are summarized and prospected.

Key words: all-solid-state battery, Li metal anode, solid electrolyte interphase, mechanics, electrochemistry

摘要:

固态锂金属电池具有理论能量密度高、安全性高等优势,是极有前景的下一代储能系统。然而,固体电极与固体电解质之间有限的固–固接触严重阻碍了界面离子的传输。因此,增加外部压力是增加固–固接触及延长电池循环寿命的重要途径。同时,在充放电过程中,电极体积变化产生的内应力也将影响电池界面特性。通过介绍两种基本物理接触模型,结合硫化物、氧化物、聚合物电解质以及金属锂的物理性质,综述了外压和内部应力对电解质、电极及电池的影响。最后,对外压力与内应力在全固态金属锂电池中的作用进行了总结和展望。

关键词: 全固态电池, 锂金属负极, 固态电解质界面膜, 力学, 电化学

CLC Number: