The interface is a critical factor of electrochemical performance for all‐solid‐state batteries (ASSBs). Comprehending the composition, structure, morphology, and their evolution in the interface during charge/discharge cycling is greatly important for the development and practical application of ASSBs. The characterization techniques are very crucial and powerful for investigating the interface properties of ASSBs. This review briefly describes how the interface is generated in ASSBs, and then emphatically summarizes some important advanced techniques used to characterize the interface in ASSBs. The principle, advantage, and application of the techniques in the interface investigation are systematically discussed. This review provides fundamental insights and perspectives for developing the characterization techniques to deeply understand the interfacial behaviors of ASSBs, which is valuable for accelerating the commercialization of ASSBs used in electronic devices, electric vehicles, and large‐scale energy storage.

中文翻译：

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全固态电池接口的高级表征技术

该接口是全固态电池（ASSB）电化学性能的关键因素。理解充电/放电循环过程中界面的组成，结构，形态及其演变对ASSB的开发和实际应用非常重要。表征技术对于研究ASSB的接口属性非常关键且功能强大。本文简要介绍了如何在ASSB中生成接口，然后着重总结了用于表征ASSB中接口的一些重要的高级技术。系统地讨论了该技术的原理，优势以及在接口研究中的应用。