▎ 摘　　要

NOVELTY - Preparing a carbon nanotube brush material modified by active metal involves utilizing functional macromolecules that are grafted on the surface of a carbon nanotube containing bromine functional groups, a metal-organic framework grows in a limited domain in situ, and the active metal modified carbon nanotube brush material is prepared by further melamine chemical vapor deposition and catalytic pyrolysis. USE - Method for preparing a carbon nanotube brush material modified by active metal used in a lithium sulfur battery separator modification coating (claimed). ADVANTAGE - The active metal modified carbon nano-tube brush material has ultra-fine main diameter of less than 100 nm, and has improved lithium sulfur battery multiplying power performance and cycle life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an application method of carbon nanotube brush material modified by active metal, which involves taking an active metal modified carbon nanotube brush material and polyvinylidene fluoride according to a mass ratio of 9: 1, adding N-methyl pyrrolidone serving as a solvent, grinding and uniformly mixing to obtain slurry, uniformly coating the slurry on the surface of a commercial battery diaphragm, drying and cutting to obtain the modified diaphragm.