Challenges, fabrications and horizons of oxide solid electrolytes for solid‐state lithium batteries

Abstract Solid electrolyte is a key component for all‐solid‐state lithium battery that is one of the most promising technologies for next‐generation energy storages. This review describes the challenges and strategies, preparation methods and outlook of oxide solid electrolytes for solid‐state lithium batteries. The general strategies on enhancing ionic conductivity of oxide solid electrolytes and reducing impedance interface are first summarized. We then introduce the basic structures of typical oxide electrolytes. The preparation technologies are also introduced for oxide electrolytes with various dimensions including bulk, thin film and fiber. In addition, the integration of oxide electrolytes with electrode materials is highlighted. In the last part, an outlook for the future development of oxide electrolytes towards practical applications is provided.