FINE IN-SITU OBSERVATION OF BATTERY INTERIOR WITH XRM

Introduction

Battery degradation can be caused by a variety of factors. From a macroscopic perspective, the key causes of degradation are related to vacancies, cracks, particle decay, and interfacial peeling. X-ray CT, a bulk imaging method, can be used for in-situ observation of the internal core of a solid battery component without disassembly of the battery pack.

Rigaku’s nano3DX system enables high-contrast and higher-resolution measurement than X-ray micro CTs, enabling it to capture and visualize these macroscopic phenomena.

3D rendered X-ray CT images of solid electrolyte. 2.5 micron/voxel

X-ray CT imaging allows visualization of crack growth and propagation in solid-state electrolytes during battery operation. Cracks with the solid-state electrolyte are one of the primary degradation mechanisms related to short-circuits within the battery pack.

Visualization and Control of Chemically Induced Crack Formation in All-Solid-State Lithium-Metal Batteries with Sulfide Electrolyte
Misae Otoyama, Motoshi Suyama, Chie Hotehama, Hiroe Kowada, Yoshihiro Takeda, Koichiro Ito, Atsushi Sakuda, Masahiro Tatsumisago, and Akitoshi Hayashi
ACS Applied Materials & Interfaces 2021 13 (4), 5000-5007