▎ 摘　　要

NOVELTY - Controllable preparation of magnesium air battery using manganese oxide overlong nanowire/graphene electro-catalyst comprises weighing mesocarbon microbeads, pouring into round bottom bottle, placing into ice water bath, adding concentrated sulfuric acid, and magnetic force stirring; adding potassium permanganate solid powder, gradually adding distilled water, and maintaining solution temperature; and placing into atmospheric pressure microwave radiation reactor equipped with reflux cooling device, cooling pipe and cool water import, reacting, adding hydrogen peroxide, and reacting. USE - Method for controllable preparation of magnesium air battery using manganese oxide overlong nanowire/graphene electro-catalyst (claimed). ADVANTAGE - The method has controllable experiment parameter, high synthesis efficiency, uniform manganese oxide electrocatalytic overlong nanowire and graphene, and comprehensive electrochemical property. DETAILED DESCRIPTION - Controllable preparation of magnesium air battery using manganese oxide overlong nanowire/graphene electro-catalyst comprises: (A) weighing 2.0000 g mesocarbon microbeads having average diameter of 15 mu , pouring into 250 ml round bottom bottle, placing into ice water bath, adding 50 ml concentrated sulfuric acid, and magnetic force stirring for 1 hour; (B) adding 7.5000 g potassium permanganate solid powder to obtain intermediate, continuously stirring for 5 minutes, gradually adding 150 mL distilled water, and maintaining solution temperature at 95 degrees C; (C) placing into atmospheric pressure microwave radiation reactor equipped with reflux cooling device, cooling pipe and cool water import, reacting at 100 degrees C for 15 minutes at inlet temperature of 15 degrees C, outlet temperature of 20 degrees C, cooling water flow quantity of 2 L/minute and power of 700 W, adding 32 ml of 30% hydrogen peroxide, and reacting into microwave reactor for 10 minutes at 700 W; and (D) cooling solution to room temperature, high speed centrifuging black suspension for 10 minutes at speed of 8000 revolutions/minute, moisturizing and washing with distilled water for 8 times, oven box drying at 80 degrees C for 24 hours, and drying under high purity argon gas protection into tubular furnace at 800 degrees C for 10 hours to obtain graphene nanosheet material having diameter of 5-15 mu m and thickness of 1-100 nm.