Crystalline Porous Materials-based Solid-State Electrolytes for Lithium Metal Batteries

The ever-growing market for electric vehicles and grid-scale energy storage is boosting the development of high energy density lithium metal batteries (LMBs). Solid-state electrolytes (SSEs) are not only nonflammable to overcome the intrinsic drawbacks of liquid electrolytes, but also mechanically strong enough to suppress the growth of lithium dendrites, whose development could greatly promote the safety and performance of LMBs. Crystalline porous materials (CPMs) with high surface area, adjustable pores, ordered channels, and versatile functionality have not only provided a promising structural platform for designing fast ionic conducting materials, but also offered great opportunities for manipulating their physicochemical and electrochemical properties, which have shown great potential to fabricate high-performance SSEs and have become an emerging research direction in recent years. In this review, the latest progress of CPMs-based SSEs for LMBs, including pristine CPMs and CPMs-based composites, is systematically summarized. By discussing the pioneer work, both merits and issues arising from CPMs are emphasized as well as an outlook for the development of CPMs-based SSEs with high-performance and reliable safety are presented.