▎ 摘　　要

NOVELTY - A diaphragm based on nitrogen-enriched column layer structure MOF, comprises PL-MOF(cobalt)-graphene loaded on polypropylene diaphragm. USE - Diaphragm based on nitrogen-enriched column layer structure metal organic framework (MOF), is useful in lithium-sulfur battery (claimed) used in electric energy storage device e.g. electric vehicles. ADVANTAGE - The diaphragm can effectively inhibit the shuttle effect of polysulfide, and greatly improve the electrochemical performance of the lithium-sulfur battery. The method is simple and convenient, it can realize large-scale production, and has a certain pushing effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the diaphragm, which involves using cobalt salt solution, 4,5-imidazoledicarboxylic acid, 4,4-bipyridine, an alkaline solution, graphene, polyvinylidene fluoride, N-methylpyrrolidone, and polypropylene diaphragm.