Fig. 7: Schematic of the evolution of interfacial degradation at the LGPS|NCM622 interface.

In low-voltage range (3.1 V vs. In/InLi < E < 3.7 V vs. In/InLi), the electrochemical decomposition of SE takes place at the interface. In the high-voltage range (E ≥ 3.7 V vs. In/InLi), the oxygen-involving degradation dominates the interfacial reaction.