Localised degradation within sulfide-based all-solid-state electrodes visualised by Raman mapping.

The distribution of degradation products, before and after cycling, within common sulfide-based solid electrolytes (β-LiPS, LiPSCl and LiGePS) was mapped using Raman microscopy. All composite electrodes displayed the appearance of side reaction products after the initial charge-discharge cycle, located at the site of a LiNiMnCoO particle.