▎ 摘　　要

NOVELTY - Graphene-activated carbon composite comprises activated carbon as core and graphene layer as shell. USE - Graphene-activated carbon composite is used in supercapacitor and lithium ion battery (all claimed). ADVANTAGE - The graphene-activated carbon composite has excellent electrical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-activated carbon composite, which involves preparing graphene oxide, dispersing activated carbon and graphene oxide in solvent to prepare spray solution, spraying spray solution into droplets, heating droplets to prepare graphene-activated carbon composite which includes activated carbon coated with graphene layer.