Understanding the interfacial behaviours in solid-state batteries by probing the structural and chemical properties using X-ray phase contra

The understanding of the sophisticated electro-chemo-mechanical interplay occurred at solid-solid interfaces has not been fully elucidated, which necessitates localized probes to comprehensively investigate the structural and chemical evolution of electrodes during battery cycling, revealing how the complex interplay among void formation and interphase growth affects battery properties. Herein, we propose to combine hard x-ray phase-contrast nano-tomography and advanced machine learning approaches to systematically investigate the morphological and chemical evolutions in all-solid-state LiNi0.8Co0.15Al0.05O2 (NCA) cathodes interphases that are subjected to different cycling protocols. We aim to develop a theoretical inter- and intra- particle model that could predict the mechanical failure in the state-of-the-art all-solid-state batteries.