▎ 摘　　要

NOVELTY - The preparation of tin dioxide/graphene composite hollow ball involves ultrasonically dispersing high molecular polymer microspheres into solution, adding surfactant, dripping tin precursor aqueous solution, reacting, centrifugally separating, washing, and drying to obtain white powder, calcining to obtain grey white powder, preparing carbon source, placing grey white powder into a central heating section of furnace, sealing a reaction chamber, introducing inert gas, heating reaction chamber, maintaining inert gas flow rate, heat-preserving, and high-temperature preheating. USE - Preparation of tin dioxide/graphene composite hollow ball (claimed). ADVANTAGE - The method enables preparation of tin dioxide/graphene composite hollow ball with improved contact area of material, adsorption performance, mechanical toughness, excellent charge-discharge properties, and specific capacity of 43.30 F.g-1, by simple, economical and industrial process. DETAILED DESCRIPTION - The preparation method of tin dioxide/graphene composite hollow ball involves (A) ultrasonically dispersing high molecular polymer microspheres into solution, adding surfactant, dripping tin precursor aqueous solution, reacting at room temperature for 3-8 hours, centrifugally separating, washing 2-4 times, and drying to obtain white powder, and calcining the white powder to obtain grey white powder, and (B) preparing carbon source, placing the grey white powder into a central heating section of the furnace, sealing a reaction chamber, introducing inert gas, heating the reaction chamber at 700-1000 degrees C, maintaining inert gas flow rate at 50-100 ml/minute, heat-preserving for 60-240 minutes, and high-temperature preheating to obtain black powder.