▎ 摘　　要

NOVELTY - A nano-graphene/sulfur composite material preparing method involves preparing graphene dispersion, preparing nano-graphene by dispersing metal oxide nanoparticles in deionized water ultrasonically, mixing, incubating, cooling, solidifying, transferring to freeze dryer and drying to obtain nano-graphene. Sulfur powder is added to organic solvent, stirred until completely dissolved, added with nano-graphene, evaporated to dryness to obtain product. The product is allowed for ball milling, subjected for heat treatment under inert atmosphere protection to obtain the finished product. USE - Method for preparing nano-graphene/sulfur composite material for use as lithium sulfur battery positive pole material (claimed). ADVANTAGE - The method enables preparing composite material with high specific capacity and good cycle stability, in simple, easy and cost effective manner. DETAILED DESCRIPTION - A nano-graphene/sulfur composite material preparing method involves preparing graphene dispersion by adding reducing agent in graphene oxide under water bath at 70-100 degrees C, washing until neutral graphene, dispersing in deionized water to obtain graphene dispersion, preparing nano-graphene by dispersing metal oxide nanoparticles in deionized water ultrasonically, mixing, incubating, cooling, solidifying, transferring to freeze dryer and drying to obtain nano-graphene. Sulfur powder is added to organic solvent, stirred until completely dissolved, added with nano-graphene, evaporated to dryness to obtain product. The product is allowed for ball milling, subjected for heat treatment under inert atmosphere protection to obtain the finished product.