▎ 摘　　要

NOVELTY - Modified graphene coating manganese lithium cathode material comprises 50 pts. wt. graphene oxide, 40 pts. wt. lithium manganese oxide, 28 pts. wt. 45% lithium ferric nitrate solution, 5 pts. wt. flake graphite and 5 pts. wt. adhesive material. USE - Used as modified graphene coating manganese lithium cathode material. ADVANTAGE - The material has improved self-discharge effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing modified graphene coating manganese lithium cathode material comprising (i) taking graphite with sodium nitrate in mass ratio of 2:1, adding concentrated sulfuric acid and placing in an ice bath, adding with stirring potassium permanganate in an amount of 3 times of mass of graphite, mixing, controlling the temperature with stirring to 20 degrees C for 1 hour, then raising the temperature to 32-38 degrees C for 2 hours, slowly dropwise adding deionized water, stirring, adding hydrogen peroxide to terminated reaction, subjecting to suction filtration, washing and drying, heating with stirring, adding carbon nanotube and uniformly dispersing glycol slurry, stirring for 2 hours to obtain graphene oxide, (ii) dispersing the graphene oxide in a volume ratio of 3:1 of water and acetone mixed solvent, ultrasonic stirring in water or chloroform to dispersing uniformly, (iii) adding active materials, functional materials, conductive materials and bonding material into mixed solution, ultrasonicating or stirring, adjusting pH of mixed solution to 2 and 4 with or without doping acid, and (iv) cooling under ice, adding ammonium persulfate aqueous solution or ferric chloride in chloroform solution under inert atmosphere, stirring for 24 hours, then centrifuging, washing, placing in a vacuum oven and drying at 60 degrees C, and grinding to obtain powder.