▎ 摘　　要

NOVELTY - The sulfur-hydroxylated graphene nanocomposite comprises a hydroxylated graphene sheet having a surface and amorphous sulfur nanoparticles homogeneously distributed on the surface. The nanocomposite lacks sulfur microparticles bound to the graphene via hydroxyl groups. The sulfur is present in an amount of 30 wt.%. USE - The sulfur-hydroxylated graphene nanocomposite is useful in a cathode of a rechargeable lithium-sulfur battery (all claimed), which is useful in: consumer electronics including cameras, cell phones, gaming devices or laptop computers; much larger devices such as electric automobiles, motorcycles, buses, delivery trucks, trains or boats; an energy storage unit in connection with energy production for a smart grid; and an energy storage unit for factories or health care facilities. ADVANTAGE - The sulfur-hydroxylated graphene nanocomposite can be economically manufactured with less energy consumption, improves conductivity or mechanical stability and overall capacity of the cathode by preventing the dissolution of polysulfides thus enhancing energy density, Coulombic efficiency (95%), power density, rate capability, cycle life and safety of the battery against hazards if the battery overheats, ruptures or short circuits. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a cathode; (2) a rechargeable lithium-sulfur battery; and (3) a method for making a sulfur-hydroxylated graphene nanocomposite. DESCRIPTION OF DRAWING(S) - The figure shows a scanning electron microscopic image of a cycled sulfur-hydroxylated graphene nanocomposite cathode.