▎ 摘　　要

NOVELTY - Preparing metal-organic framework composite modified diaphragm comprises (i) dissolving tetrakis(4-carboxyphenyl)porphyrin, zirconyl nitrate, formic acid and 3,3-dimethylbutyric acid in an organic solvent, and carrying out hydrothermal reaction to prepare zirconium cluster-based metal-organic framework (MOF) material, and (ii) adding the zirconium cluster-based MOF material, graphene and polyvinylidene fluoride into polypyrrolidone, mixing, carrying out suction filtration out with Celgard2500 (Mono-layer membrane of polypropylene) polypropylene diaphragm to obtain a metal-organic framework composite modified diaphragm. USE - The metal-organic framework composite modified diaphragm is useful for preparing lithium sulfur battery (claimed). ADVANTAGE - The metal organic framework composite material modified diaphragm has high conductivity, adsorbability and catalytic function, which can effectively inhibit the shuttle effect. It improves the electrochemical performance of the battery, the commercial of the lithium-sulfur battery system has a certain pushing effect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a metal-organic framework composite modified diaphragm, prepared by the above method; and a lithium sulfur battery.