Xinya Tang, Zebo Gu, Junyong Deng, Guorong Liu, Kun Huang, Jun Cai, Siyao Zhang, Hao Feng, Qingxing Zheng, Zeyan Chen, Ting Sun, Hao Chen, Yuefeng Cao, Jun Chen
This work explores degradation of Li-rich Mn-based layered oxide cathodes using an operando FBG-DEMS platform for simultaneous strain and gas detection. Variable-temperature tests reveal a consistent temporal offset where stress-related relaxation precedes O2 evolution across 5-55 °C, providing experimental constraints for understanding the chronological sequence of cathode degradation.