![]() ![]() ![]() The interfacial degradation/failure mechanisms, including the contact and electrochemical stability of interfaces, are introduced. In this review, the problems associated with ECMC at electrode/SE interfaces are summarized. 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. On the other hand, electrochemical reactions such as lithium deposition cause mechanical deformation and stress at electrode/SE interfaces. On one hand, mechanical stress strongly influences interfacial contact and causes side reactions. Electro–chemo–mechanical coupling (ECMC) strongly affects the interfacial stability of SSBs. 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).
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