Reducing the Interfacial Resistance in All‐Solid‐State Lithium Batteries Based on Oxide Ceramic Electrolytes

Abstract All‐solid‐state lithium batteries (ASSLBs) are regarded as next‐generation advanced energy‐storage devices, owing to their high energy density and safety. The interfacial resistance is a crucial factor affecting the practical application of ASSLBs. ASSLBs based on oxide‐based ceramic electrolytes (OCEs) still exhibit poor electrochemical performance, owing to the large interfacial resistance. Area‐specific resistance values at the interfaces ranging from thousands of ohms to several ohms per square centimeter have been achieved using multiple strategies. This Review summarizes multiple existing advanced strategies used to reduce the interfacial resistance between OCEs and electrodes through interfacial engineering. We also propose some perspectives for the future development of ASSLBs based on OCEs.