▎ 摘　　要

NOVELTY - Preparing cobalt sulfide-doped-carbon nanotubes-doped-graphene composite material comprises (a) preparing graphene oxide aqueous solution, (b) dispersing zeolitic imidazolate framework-67 (ZIF-67) powder and thioacetamide in the graphene oxide aqueous solution, stirring, mixing to obtain a first mixed solution, (c) adding pyrrole into the first mixed solution, stirring, mixing evenly to obtain a second mixed solution and (d) transferring the second mixed solution to a polytetrafluoroethylene-lined reaction kettle, heating, cooling, freeze-drying process and performing heat treatment in argon atmosphere to obtain the sample cobalt sulfide -doped-carbon nanotubes-doped-graphene USE - The composite material is useful in lithium-sulfur battery (claimed). ADVANTAGE - The method is simple, pollution-free; ensures composite material with good flexibility and exhibits high capacity performance, excellent rate performance and long cycle performance.