▎ 摘　　要

NOVELTY - Preparation of material involves mixing reduced graphene oxide with elemental sulfur, mixing with a supercritical fluid to enable the pressure to reach and maintaining at 50-200 bar, and stirring. USE - Preparation of material used in positive electrode sheet of lithium-sulfur battery (all claimed). ADVANTAGE - The method uses supercritical fluid with strong dissolving power, high fluidity and high transferability to assist in grinding raw materials, effectively expands the interlayer of reduced graphene oxide, creates more extra space for sulfur encapsulation, ensures strong interaction between sulfur and carbon hosts, and facilitates efficient and uniform physical confinement of sulfur, can effectively improve the coulomb efficiency and the cycle performance of the obtained material, is simple and convenient, low cost and is environment-friendly, and is convenient for mass production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of positive electrode sheet, which involves mixing 70-90 wt.% material, 5-15 wt.% conductive agent and 5-15 wt.% binder in a solvent, stirring evenly to obtain a uniform quality slurry, coating on the current collector, and drying.