▎ 摘　　要

NOVELTY - Method for preparing two-dimensional ultra-thin cobalt oxide/graphene composite material, involves preparing cobalt hydroxide ultra-thin nanosheets by a hot solvent method, ultrasonically mixing with graphene oxide, adding hydrazine, reflux reducing, and centrifuging to obtain material. USE - The method is useful for preparing two-dimensional ultra-thin cobalt oxide/graphene composite material. ADVANTAGE - The prepared two-dimensional ultra-thin cobalt oxide/graphene composite material has integrated two-dimensional composite material which is laminated layer by layer.