Degradation mechanism of all?solid?state lithium?ion batteries with argyrodite Li_7?<i>x</i>PS_6?<i>x</i>Cl_<i>x</i> sulfide through high?temperature cycling test

Sulfide-based all-solid-state lithium-ion batteries (LIBs) are promising replacements for conventional liquid electrolyte LIBs. However, their degradation mechanisms and analysis methods poorly understood. Herein, the mechanism of an argyrodite-type sulfide-based prototype LIB cell is reported. Furthermore, method using charge/discharge cycle tests at 100°C followed by disassembly cells before after accelerated Based on findings this study, classified as follows: (i) solid (SE) oxidation in positive electrode, which recovers battery capacity increases resistance; (ii) SE reduction negative decreases capacity; (iii) lithium deposition on/in (iv) loss capacity. These reactions appear to occur simultaneously. expected aid development solid-electrolyte LIBs with improved safety energy densities.