物理化学学报 >> 2021, Vol. 37 >> Issue (11): 2007070.doi: 10.3866/PKU.WHXB202007070

所属专题: 能源与材料化学

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全固态电池界面的研究进展

王晗1, 安汉文1, 单红梅2, 赵雷1, 王家钧1,*()   

  1. 1 哈尔滨工业大学化工与化学学院,哈尔滨 150000
    2 哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150000
  • 收稿日期:2020-07-25 录用日期:2020-08-20 发布日期:2020-08-26
  • 通讯作者: 王家钧 E-mail:jiajunhit@hit.edu.cn
  • 作者简介:王家钧,哈尔滨工业大学教授,获批哈尔滨工业大学青年科学家工作室,2012-2017年,美国布鲁克海文国家实验室科学家。主要研究方向为电池材料与同步辐射三维成像技术
  • 基金资助:
    国家自然科学基金(U1932205);黑龙江省自然科学基金(ZD2019B001)

Research Progress on Interfaces of All-Solid-State Batteries

Han Wang1, Hanwen An1, Hongmei Shan2, Lei Zhao1, Jiajun Wang1,*()   

  1. 1 School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150000, China
    2 College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150000, China
  • Received:2020-07-25 Accepted:2020-08-20 Published:2020-08-26
  • Contact: Jiajun Wang E-mail:jiajunhit@hit.edu.cn
  • About author:Jiajun Wang, Email: jiajunhit@hit.edu.cn; Tel.: +86-451-86412114
  • Supported by:
    the National Natural Science Foundation of China(U1932205);the Natural Science Funds of Heilongjiang Province, China(ZD2019B001)

摘要:

采用固态电解质代替有机电解液的全固态电池具有高能量密度和高安全性等优点,为下一代能量存储设备提供了一种很有发展前途的解决方案。然而,大多数固态电解质和电极活性物质间都存在严重的界面问题,制约固态电池的实际应用;解决固态电池中的固-固界面问题,提升固态电池电化学性能是目前的研究热点。本文详细总结了固态电池中的界面挑战、改善策略以及针对界面问题的表征方法,并展望了固态电池今后发展中的关键方向和趋势。

关键词: 全固态电池, 固体电解质, 界面, 稳定性, 界面修饰, 表征方法

Abstract:

Owing to the serious energy crisis and environmental problems caused by fossil energy consumption, development of high-energy-density batteries is becoming increasingly significant to satisfy the rapidly growing social demands. Lithium-ion batteries have received widespread attention because of their high energy densities and environmental friendliness. At present, they are widely used in portable electronic devices and electric vehicles. However, security aspects need to be addressed urgently. Substantial advances in liquid electrolyte-based lithium-ion batteries have become a performance bottleneck in the recent years. Traditional lithium-ion batteries use organic liquids as electrolytes, but the flammability and corrosion of these electrolytes considerably limit their development. Continuous growth of lithium dendrites can pierce the separator, leading to electrolyte leakage and combustion, which is a serious safety hazard. Replacement of organic electrolytes with solid-state electrolytes is one of the promising solutions for the development of next-generation energy storage devices, because they have high energy densities and are safe. Solid electrolytes can remarkably alleviate the safety hazards involved in the use of traditional liquid-based lithium-ion batteries. In addition, the composite of solid-state electrolytes and lithium metal is expected to result in a higher energy density. However, due to the lack of fluidity of the solid electrolytes, problems such as limited solid-solid contact area and increased impedance at the interface when solid-state electrolytes are in contact with electrodes must be solved. The localized and buried interface is a major drawback that restricts the electrochemical performance and practical applications of the solid-state batteries. Fabrication of a stable interface between the electrodes and solid-state electrolyte is the main challenge in the development of solid-state lithium metal batteries. All these aspects are critical to the electrochemical performance and safety of the solid-state batteries. Current research mainly focuses on addressing the problems related to the solid-solid interface in solid-state batteries and improving the electrochemical performance of such batteries. In this review, we comprehensively summarize the challenges in the fabrication of solid-state batteries, including poor chemical and electrochemical compatibilities and mechanical instability. Research progress on the improvement strategies for interface problems and the advanced characterization methods for the interface problems are discussed in detail. Meanwhile, we also propose a prospect for the future development of solid-state batteries to guide the rational designing of next-generation high-energy solid-state batteries. There are many critical problems in solid-state batteries that must be fully understood. With further research, all-solid-state batteries are expected to replace the traditional liquid-based lithium-ion batteries and become an important system for a safe and reliable energy storage.

Key words: All-solid-state battery, Solid-state electrolyte, Interface, Stability, Interface modification, Characterization method

MSC2000: 

  • O646