Functional materials for modifying interfaces between solid electrolytes and lithium electrodes of all-solid-state lithium metal batteries

All-solid-state lithium metal batteries have attracted considerable attention as the next-generation energy storage devices with high energy density and safety. This review focuses on the properties of interfaces between solid electrolytes and lithium electrodes, which are important for realizing all-solid-state lithium metal batteries. Various functional materials were used for modifying such interfaces, including amorphous oxide solid electrolytes, LiF, Al2O3, and carbon-based materials. After reviewing literature works related to this topic, we concluded that optimizing the combinations of the various functional materials should be studied more actively. In addition, along with performance optimization of functional materials, the development of mass-production processes should be carried out in parallel.