Metal–organic frameworks as conductivity enhancers for all-solid-state lithium batteries†

Li-ion batteries are nonpareil when it comes to the combination of high energy and power density, making them the most suitable technology for electric vehicles, portable electronics and so on. Among Li-ion conductors, NASICON-type electrolytes are among the promising candidates for all-solid-state lithium batteries. However, the conventional synthesis approaches involve time-consuming multi-step high-temperature densification. Herein, we report a simple, efficient, and cost-effective strategy to develop composite solid electrolytes by incorporating MOFs in LATP using a powder cold press approach. Here, we report composite solid electrolytes (CSEs) composed of LATP ceramic particles and metal–organic frameworks (MOFs) in a SCN–LiTFSI matrix. The highly tunable porous structure of MOFs facilitates ion movement and acts as promising building materials for solid-state Li-ion conductors. In this study, the morphology, conductivity, and electrochemical cycling of LATP and its composite combinations are very well explored. Further, LATP–MOF composite solid electrolytes are tested for Li-ion and Li–Se batteries in an all-solid-state configuration with a lithium–metal anode.