▎ 摘　　要

NOVELTY - Preparation of graphene-loaded manganese oxide composite material comprises mixing water and graphene oxide and ultrasonically dispersing for 1-24 hours; mixing water, zinc nitrate and manganous sulfate and stirring; mixing with graphene oxide colloid; adding sodium hydroxide solution and hydrogen peroxide solution, stirring for 0.5-3 hours, filtering, and washing; and mixing with hydrochloric acid solution at ratio of 0.02-1:2000, stirring for 0.5-4 hours, filtering, washing, drying, and heat-preserving for 0.5-24 hours at 150-500 degrees C under inert gas or air condition. USE - Method for preparing graphene-loaded manganese oxide composite material (claimed). ADVANTAGE - The composite material has uniform shape and high electrochemical performance. DETAILED DESCRIPTION - Preparation of graphene-loaded manganese oxide composite material comprises mixing water and graphene oxide at mass ratio of 200-10000:1 and ultrasonically dispersing for 1-24 hours; mixing water, zinc nitrate and manganous sulfate at mass ratio of 700-70000:1-10:1 and stirring; mixing with graphene oxide colloid at mass ratio of 0.04-200:1; adding sodium hydroxide solution and hydrogen peroxide solution at mass ratio of 0.02-500:1:0-30, stirring for 0.5-3 hours, filtering, and washing, where manganese suspension concentration is 0.001-0.03 mol/L, concentration of sodium hydroxide solution is 0.01-10 mol/L, and concentration of hydrogen peroxide solution is 10-30 wt.%; and mixing with hydrochloric acid solution at ratio of 0.02-1:2000, stirring for 0.5-4 hours, filtering, washing, drying, and heat-preserving for 0.5-24 hours at 150-500 degrees C under inert gas or air condition.