▎ 摘　　要

NOVELTY - Manufacture of nitrogen-doped graphene/ferric oxide composite electrode material involves mixing urea as a nitrogen source and the oxidized graphene dispersion, ultrasonically dispersing, adding distilled water, heating, magnetically stirring, reacting, adding concentrated sulfuric acid and concentrated nitric acid, ultrasonically dispersing, cooling, reacting, adding hydrogen peroxide, stirring, adding soluble ferrous salt to the dispersion, magnetically stirring, reacting, cooling to obtain a nitrogen-doped graphene/ferric oxide hydrogel, freezing the hydrogel for 4-6 minutes, and drying. USE - Manufacture of nitrogen-doped graphene/ferric oxide composite electrode material used for battery. ADVANTAGE - The method enables manufacture of nitrogen-doped graphene/ferric oxide composite electrode material with improved three-dimensional pore structure and high specific surface area. DETAILED DESCRIPTION - Manufacture of nitrogen-doped graphene/ferric oxide composite electrode material involves preparing 3 mg/mL oxidized graphene dispersion by Hummers method, mixing urea as a nitrogen source and the oxidized graphene dispersion, in ratio of 10-20:1, ultrasonically dispersing, adding distilled water, adjusting pH to 10-12, heating, magnetically stirring, reacting the solution in a polytetrafluoroethylene reactor, adding concentrated sulfuric acid and concentrated nitric acid, ultrasonically dispersing for 30 minutes, cooling at -15 degrees C to 5 degrees C, reacting at 25-45 degrees C, adding 10-20 mL hydrogen peroxide, stirring, adding soluble ferrous salt to the dispersion, magnetically stirring, reacting at 120-140 degrees C for 3-5 hours in the polytetrafluoroethylene reactor, cooling to room temperature to obtain a nitrogen-doped graphene/ferric oxide hydrogel, freezing the hydrogel for 4-6 minutes, and drying at -80 degrees C for 48 hours.