▎ 摘　　要

NOVELTY - Preparing manganese dioxide composite material comprises e.g. (i) preparing 0.1-5 mg/ml aqueous graphene oxide solution, (ii) adding foam nickel into the oxidized graphene aqueous solution, ultrasonically processing to obtain foam nickel material loaded with graphene oxide, drying the material to obtain foam nickel-graphene oxide composite product, and (iii) using foam nickel-oxide graphene composite product, soaking in potassium permanganate aqueous solution, adding ethylene glycol under stirring condition, and reacting at 25-200 degrees C for 1-6 hours, cooling, separating, washing and drying. USE - The method is useful for preparing manganese dioxide composite material (claimed). ADVANTAGE - The method can effectively slows down the cascade, irreversible agglomeration problem of the graphene. DETAILED DESCRIPTION - Preparing manganese dioxide composite material comprises (i) preparing 0.1-5 mg/ml aqueous graphene oxide solution, (ii) taking the foam nickel to the oxidized graphene aqueous solution, ultrasonically processing to obtain foam nickel material loaded with graphene oxide, drying the material to obtain foam nickel-graphene oxide composite product, and (iii) using the foam nickel-oxide graphene composite product, soaking in potassium permanganate aqueous solution, adding ethylene glycol in dropwise manner under stirring condition, and controlling the reaction temperature at 25-200 degrees C for 1-6 hours, cooling, separating, washing and drying to obtain the manganese dioxide composite material.