▎ 摘　　要

NOVELTY - Preparing graphene composite material, comprises dissolving the first molar amount of chromium trioxide in the second molar amount of water to form a chromic acid solution, dropping a third molar amount of concentrated sulfuric acid to the chromic acid solution while stirring, and stirring until it is uniformly mixed to form a mixed solution, adding a fourth molar amount of expanded graphite to the mixed solution to form a mixed system of intercalated graphite composition under first stirring condition, processing mixed body under specified peeling conditions, and subjecting the intercalated graphite composition to high-pressure homogeneous peeling to obtain a graphene mixed liquid, under the second stirring condition, adding basic barium salt into graphene mixture to form suspension, and basic salt of barium into slowly adjust pH near neutral range of suspension, spray drying to obtain a powdered graphene composite material, or, distilling and concentrating. USE - The method is useful for preparing graphene composite material. ADVANTAGE - The method improves the dispersibility of graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene composite material, comprising graphene, barium chromate-barium sulfate, where the ratio of the amount of the graphite and the barium chromate-barium sulfate substance ranges from 1:0.2-1:1.5.