▎ 摘　　要

NOVELTY - Preparing high-capacity composite material involves weighing 1000ml graphene oxide solution having concentration of 1-10mg/ml, dispersing ultrasonically, adding 10-100mg hydrogen peroxide having concentration of 1-30 wt.% and 5-50mg nitrogen source, and dispersing uniformly to obtain nitrogen-containing oxide graphene solution A. The nitrogen-containing oxide graphene solution A is weighed to 1000ml and added 10-100g ternary material. The obtained product is dispersed ultrasonically to obtain mixed solution B. The obtained product is put into the reaction kettle and blast oven at 150-200 degrees C. USE - Method for preparing high-capacity composite material (claimed). ADVANTAGE - The method enables to prepare high-capacity composite material improves the gram capacity of the ternary material and imbibition capacity of graphene, reduces material specific surface area, and first efficiency that adopts hydrothermal method to prepare graphene oxide with high density, and has good absorbing ability by doping hydrogen peroxide. DETAILED DESCRIPTION - Preparing high-capacity composite material involves weighing 1000ml graphene oxide solution having concentration of 1-10mg/ml, dispersing ultrasonically, adding 10-100mg hydrogen peroxide having concentration of 1-30 wt.% and 5-50mg nitrogen source, and dispersing uniformly to obtain nitrogen-containing oxide graphene solution A. The nitrogen-containing oxide graphene solution A is weighed to 1000ml and added 10-100g ternary material. The obtained product is dispersed ultrasonically to obtain mixed solution B. The obtained product is put into the reaction kettle and blast oven at 150-200 degrees C for 2-6 hours. The obtained product is cooling naturally to room temperature and filtered to obtain ternary composite material. The obtained product is transferred into the vacuum drying box at 40-80 degrees C for 24-72 hours to obtain ternary material-graphene composite material C. The 10-50g ternary material-graphene composite material C is weighed and put into the 500ml hydrocarbon solution having concentration of 10%. The obtained product is stirred and transferred into the tubular furnace under inert atmosphere. The obtained product is sintered to obtain ternary material outer layer which is coated with carbon material-graphene composite material. The ternary composite material is used as ternary material as core and nitrogen-containing oxide graphene as shell. The surface is covered with shell ternary composite material carbon material.