▎ 摘　　要

NOVELTY - Preparing Metal-Organic Framework (MOF) material comprises providing a MOF material, coating the carbon precursor on the surface of the MOF material, performing heat treatment, so as to form a carbon-containing conductive layer on the surface of the MOF material and obtaining the MOF material. USE - The material and the diaphragm are useful in preparing lithium sulfur battery (claimed). ADVANTAGE - The method: is simple; uses readily available and environmentally friendly raw materials and is suitable for large-scale preparation. The diaphragm has large MOF areal density and small areal loading, and exhibits higher specific capacity, coulombic efficiency and cycle stability in lithium-sulfur battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a MOF material prepared by the above method. The material comprises a MOF material and a carbon-containing conductive layer coated on the surface of the MOF material, and the thickness of the carbon-containing conductive layer is 10-200 nm and the carbon content in the MOF material is 10-30 wt.%; (2) preparing high performance lithium sulfur diaphragm comprising providing the MOF material, mixing the MOF material, binder, conductive carbon material to form slurry and applying the slurry to the surface of the diaphragm to obtain the high performance lithium sulfur diaphragm; (3) a high performance lithium sulfur diaphragm prepared by the above method; and (4) a lithium sulfur battery comprising the high-performance lithium sulfur diaphragm.