Local electrochemical measurement of all-solid-state batteries using c-AFM

Abstract

We applied c-AFM to all-solid-state batteries to observe local electrochemical reaction. Battery samples were prepared using Li(Ni_1/3Mn_1/3Co_1/3)O₂ as the cathode active material and Li₂S-P₂S₅ (LPS) as the solid electrolyte, and the cross-section of the cathode was observed by c-AFM. The result showed that charging current was observed at NMC/LPS interfaces and also grain boundaries inside MNC particles.