A review of inorganic solid electrolyte/electrode interface in all-solid-state lithium batteries

Abstract

All-solid-state lithium batteries have attracted great interest, due to its potential to significantly improve battery safety and realize higher energy density. A solid electrolyte with high Li-ion conductivity, a small electrolyte/electrode (including cathode and anode interface) interfacial resistance and good strain tolerant is a key component in all-solid-state lithium batteries. Rational design of efficient electrolyte/electrode interfaces to improve the stability of interface and significantly decrease the interfacial resistance is one of the key challenges in enabling all-solid-state lithium batteries. This paper reviews the state-of-the-art development of some solid electrolytes which has received extensive attention, eg. sulfides and garnet type oxides. Major issues associated with electrolyte/electrode interface of these two type solid electrolytes are summarized and analyzed.