▎ 摘　　要

NOVELTY - Preparation of graphene-coated cobalt oxide composite material comprises mixing graphite, sodium nitrate, potassium permanganate, and concentrated sulfuric acid at mass ratio of (2-10): (0.5-2): (2-10): (50-200), and stirring at 45-70 degrees C to obtain graphene oxide solution; mixing graphene oxide solution with cobalt salt solution according to mass ratio of 1: (200-500) to obtain 1-2 mol/L mixed solution; adding mixed solution and precipitating agent into reaction kettle for precipitation reaction to obtain cobalt oxide particles; and centrifuging, washing, drying, and calcining to obtain the graphene coated cobaltosic oxide composite material. USE - The method is useful for preparing graphene-coated cobaltosic oxide composite material. ADVANTAGE - The method enables preparation of graphene-coated cobalt oxide composite material with excellent conductivity, stability, electrochemical performance and agglomeration resistance. DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation for preparing raphene-coated cobaltosic oxide composite material.