▎ 摘　　要

NOVELTY - Preparation of hollow graphene ball/sulfur composite material involves mixing ethanol solution of tetraethyl orthosilicate and ethanol solution of ammonia water, reacting, taking solids, and washing by centrifugation to obtain silicon dioxide nanoball; preparing hollow graphene ball by dispersing silicon dioxide nanoballs and hexadecyl trimethyl ammonium bromide in deionized water, adding graphene oxide solution, reacting, centrifuging, washing solids, drying, adding hydrogen fluoride solution, reacting, centrifuging, washing, and drying; and mixing with sulfur, and hot melting. USE - Method for preparing hollow graphene ball/sulfur composite material (claimed) used for battery. ADVANTAGE - The method has low cost. It improves conductivity. DETAILED DESCRIPTION - Preparation of hollow graphene ball/sulfur composite material comprises mixing ethanol solution of tetraethyl orthosilicate and ethanol solution of ammonia water, stirring, reacting, adding ammonia water, reacting, adding ethanol solution of tetraethyl orthosilicate, reacting, taking solids, and washing by centrifugation to obtain silicon dioxide nanoball; preparing hollow graphene ball by dispersing silicon dioxide nanoballs and hexadecyl trimethyl ammonium bromide in deionized water to obtain uniform dispersed mixed system, adding graphene oxide solution into mixed system, stirring, reacting, centrifuging, taking solids, washing, vacuum drying in vacuum tubular furnace, performing high temperature reduction, adding hydrogen fluoride aqueous solution, reacting, centrifuging, washing solids, and drying to obtain hollow graphite balls; and mixing hollow graphite balls and sulfur, and hot melting.