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Electro-Chemo-Mechanical Issues at the Interfaces in Solid-State Lithium Metal Batteries

机译：固态锂金属电池中界面处的电化学化学问题

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摘要

Effective solid-state interfacial contact of both the cathode and lithium metal anode with the solid electrolyte (SE) are required to improve the performance of solid-state lithium metal batteries (SSBs). Electro-chemo-mechanical coupling (ECMC) strongly affects the interfacial stability of SSBs. On one hand, mechanical stress strongly influences interfacial contact and causes side reactions. On the other hand, electrochemical reactions such as lithium deposition cause mechanical deformation and stress at electrode/SE interfaces. To solve the degradation/failure problems of interfaces and provide guidelines to construct high-performance SSBs, the ECMC at electrode/SE interfaces should be comprehensively investigated. In this review, the problems associated with ECMC at electrode/SE interfaces are summarized. The interfacial degradation/failure mechanisms, including the contact and electrochemical stability of interfaces, are introduced. Mechanical factors affecting interfacial contact and lithium deposition are highlighted. Experimental observation and computational analysis methods for electrode/SE interfaces are then summarized. Strategies to construct stable electrode/SE interfaces, such as assembling stress and wetting layers to improve interfacial contact, 3D SE structure, and plating stress relief to suppress lithium dendrite formation, are reviewed. The remaining challenges to better understanding ECMC and related solutions to aid SSB development are discussed.
机译：为了提高固态锂金属电池（SSB）的性能，需要使阴极和锂金属阳极与固态电解质（SE）进行有效的固态界面接触。电化学机械耦合（ECMC）强烈影响SSB的界面稳定性。一方面，机械应力强烈影响界面接触并引起副反应。另一方面，诸如锂沉积的电化学反应在电极/ SE界面处引起机械变形和应力。为了解决接口的退化/故障问题并为构造高性能SSB提供指导，应对电极/ SE接口的ECMC进行全面研究。在这篇综述中，总结了与电极/ SE界面上的ECMC相关的问题。介绍了界面降解/破坏机理，包括界面的接触和电化学稳定性。突出了影响界面接触和锂沉积的机械因素。然后总结了电极/ SE界面的实验观察和计算分析方法。审查了构建稳定的电极/ SE界面的策略，例如组装应力和润湿层以改善界面接触，3D SE结构以及减轻应力以抑制锂枝晶的形成。讨论了如何更好地理解ECMC和相关解决方案以帮助SSB开发的剩余挑战。

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  • 来源
    《Advanced Functional Materials》 |2019年第27期|1900950.1-1900950.29|共29页
  • 作者

    Wang Peng; Qu Wenjie; Song Wei-Li; Chen Haosen; Chen Renjie; Fang Daining;

  • 作者单位

    Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Inst Adv Struct Technol, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China;

    Beijing Inst Technol, Beijing Key Lab Lightweight Multifunct Composite, Inst Adv Struct Technol, Beijing 100081, Peoples R China|Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    degradation mechanism; electro-chemo-mechanical coupling; interfaces; solid-state lithium batteries; solutions;

    机译：降解机理;机电耦合;界面;固态锂电池;解决方案;

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