▎ 摘　　要

NOVELTY - Preparing graphene containing cathode material comprises e.g. (i) taking graphite powder and sodium nitrate and concentrated sulfuric acid, mixing in three-necked flask, then using electronic balance weighing potassium permanganate into small pieces, adding into three-flask, magnetic stirring, adding oxidizer potassium permanganate, and regulating temperature, (ii) adding potassium permanganate into three-necked flask, and cooling to room temperature, and (iii) adding hydrogen peroxide solution, and subjecting reaction solution to centrifugal precipitation in centrifuge tube. USE - The method is useful for preparing graphene containing cathode material (claimed). ADVANTAGE - The graphene oxide has more stable performance and high capacity retention rate. DETAILED DESCRIPTION - Preparing graphene containing cathode material comprises (i) taking 3 g graphite powder and 1.5 g sodium nitrate and concentrated sulfuric acid, mixing in three-necked flask, reacting under ice bath condition, stirring, then using electronic balance weighing 9 g potassium permanganate into small pieces, adding into three-flask, controlling temperature to less than or equal to 20 degrees C, magnetic stirring, adding oxidizer potassium permanganate, and regulating temperature, (ii) adding potassium permanganate into three-necked flask, and cooling to room temperature, and (iii) adding 30% hydrogen peroxide solution for washing, subjecting reaction solution to centrifugal precipitation in centrifuge tube, filtering, removing lower solid precipitate using deionized water and 30% concentration of hydrochloric acid, repeatedly washing with anhydrous ethanol obtaining solid product, subjecting resulting solid product to vacuum drying, removing, and grinding. INDEPENDENT CLAIMS are also included for: (1) graphene oxide comprising graphene material; (2) battery comprising graphene oxide; and (3) measuring electrochemical performance of graphene oxide comprising (i) mixing graphene oxide and polytetrafluoroethylene in a mass ratio of 9:1, adding 10 ml ethanol, ultrasonically dispersing for 10 minutes, transferring into an oven at 70 degrees C for 30 minutes, then removing, rolling into electrode film, covering on foam nickel, using metal lithium sheet as cathode in glove box is assembled into button-type battery, removing using Chi760E electrochemical workstation and cyclic voltammetry test method, and scanning at different speeds of 0-3 V, (ii) reducing oxidized graphite alkene reaction, specific capacity of charge is 390 mAh/g, specific capacity of discharge is 403.4 mAh/g, charge and discharge efficiency is 103.4%, charging/discharging efficiency is 103.4, graphene oxide efficiency is 96.6%, and during charging and discharging efficiency is 103.4 % by 0.1-1C, and (iii) reducing graphene gravel using hydrothermal-solvent thermal reduction method to obtain graphene, subjecting graphene oxide to hydrothermal reduction in reaction kettle at 140 degrees C in mixed solvent with water and organic solvent, where mixed solvent is prepared by adding anhydrous ethanol and ethyl acetate in a volume ratio of 5:3, dispersing oxidized graphene in anhydrous ethanol, then mixing in reaction vessel at 140 degrees C for 3 hours, cooling reactor to room temperature, filtering, and drying at 80 degrees C under vacuum to obtain graphene.