Solid-solid interfaces play a crucial role in fundamental aspects of electron transfer and ion transport, which determine the underlying physical phenomena and electrochemical behaviors in solid-state batteries. Nevertheless, the exact mechanisms at the solid-state battery interface have not been fully elucidated, which necessitates the localized probes to comprehensively understand their physical contact, interphase formation, interfacial instability, and mechanical properties. In this review, a variety of emerging imaging techniques to understand the local structure and chemistry at solid-state battery interfaces are overviewed, with special focus on how each imaging technique can address the key challenges at cathode-electrolyte interfaces, anode-electrolyte interfaces, and interparticle interfaces from the atomic scale to the macroscopic scale. The capabilities and limitations of these imaging methods are summarized and discussed. We also provide a vision of the state-of-the-art imaging characterization techniques and highlight new operando capabilities from cryogenic or synchrotron imaging methods to track the dynamic solid-state interface behaviors.

固-固界面在电子转移和离子转移的基本方面起着至关重要的作用，这些方面决定了固态电池中潜在的物理现象和电化学行为。然而，尚未完全阐明固态电池界面上的确切机制，这需要本地化探针全面了解其物理接触，相间形成，界面不稳定性和机械性能。在这篇评论中，概述了各种新兴的成像技术，以了解固态电池界面的局部结构和化学，并着重介绍了每种成像技术如何应对阴极-电解质界面，阳极-电解质界面的关键挑战，从原子尺度到宏观尺度的粒子间界面。总结和讨论了这些成像方法的功能和局限性。我们还提供了最先进的图像表征技术的愿景，并着重介绍了从低温或同步加速器成像方法追踪动态固态界面行为的新操作能力。