Solid-State Electrolytes for Lithium Batteries

This chapter aims to provide a systematic overview of the current state of the research in the field of solid-state electrolytes for all-solid-state Li batteries. The desired functional properties and ion transport mechanism of solid-state electrolytes are explained, followed by a detailed survey on the existing understanding of the metal oxides, sulfides, and halides for fast Li ion conduction. Emphasis is also given on the oxide-based Li ion solid electrolyte, covering the structures of perovskites, Na super ionic conductors (NASICONs)-type, Li super ionic conductors (LISICONs) and Li-stuffed garnets with their chemical composition-crystal structure-ionic conductivity relationships and electrochemical stability discussed. Examples of all-solid-state Li batteries and the evaluation of their performance in terms of capacity and cycle numbers are reported.