Decoupling the Effects of Interface Chemical Degradation and Mechanical Cracking in Solid-State Batteries with Silicon Electrode.

ABSTRACT: Silicon is a promising negative electrode material for solid-state batteries (SSBs) due to its high specific capacity and ability to prevent lithium dendrite formation. However, SSBs with silicon electrodes currently suffer from poor cycling stability, despite chemical engineering efforts. This study investigates the cycling failure mechanism of composite Si/Li₆PS₅Cl electrodes by decoupling the effects of interface chemical degradation and mechanical cracking. Chlorine-rich Li_5.5PS_4.5Cl_1.5 suppresses interface chemical degradation when paired with silicon, while small-grained Li₆PS₅Cl shows 4.3-fold increase of interface resistance due to large Si/Li₆PS₅Cl contact area for interface degradat

SUBMITTER: Huo H 

PROVIDER: S-EPMC11837880 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature