Fluorine-doped argyrodite sulfide electrolyte enables commercial LiCoO2 use for 4.6 V high-voltage all-solid-state batteries

Abstract

Sulfide solid-state electrolytes (SSEs) are promising candidates for next-generation high-safety all-solid-state lithium batteries (ASSLBs). However, they still face challenges such as low anodic stability limits and poor interfacial compatibility with high-voltage cathode active materials. Here, we present a series of fluorine-doped argyrodite sulfide SSEs, Li5.5PS4.5Cl1.5-xFx (LPSCl1.5-xFx) (0