Decoding Internal Stress-Induced Micro-Short Circuit Events in Sulfide-Based All-Solid-State Li-Metal Batteries via Operando Pressure Measurements

Recently, Professor Yang Yong’s team demonstrated an operando and quantitative measurement of the stress evolution of an LTO/SSE/Li configuration all-solid-state battery (ASSB) operating with various parameters, including cell capacity and current density. Based on the electrochemo-mechanical response of the Li metal anode, two micro-short circuit modes and their corresponding mechanisms are revealed. Furthermore, a finite element model (FEM) is used to explain this mechanical failure, and a “safety zone” for the Li metal anode related to the “internal stress” is given. These findings provide new insight into the micro-short circuit events induced by electrochemo-mechanical damage in sulfide-based ASSLMBs. The research, titled “Decoding Internal Stress-Induced Micro-Short Circuit Events in Sulfide-Based All-Solid-State Li-Metal Batteries via Operando Pressure Measurements,” has been published in the Advanced Energy Materials journal. The first authors are Gu Jiabao and Chen Xiaoxuan.