Achieving high durability in all-solid-state lithium metal batteries using metal–organic framework solid polymer electrolytes

摘要: Solid-state polymer electrolytes (SPEs) possess several favorable properties, such as high flexibility, easy processability, and better safety for batteries. Thus, SPEs are attracting considerable attention for the development of safer Li ion batteries. However, SPEs typically lack the required ionic conductivity for improved Li+ transportation. Therefore, suitable fillers are often used to prepare composite polymer electrolytes (CPEs) with improved ionic conductivity. In this direction, a novel CPE with increased electrochemical stability and durability was prepared by incorporating highly porous Zr-based metal–organic frameworks (MOFs), herein referred to as ZR8, as fillers in poly(ethylene oxide) (PEO)/Li salt systems. PEO in the prepared CPE showed low crystallization ratios, and the CPE showed enhanced Li+ ion transportation, thereby improving mechanical and fire-retardant properties. It was also able to hinder Li …