▎ 摘　　要

NOVELTY - Preparation of graphene oxide/yttrium-cobalt oxide nanoarray electrode material involves preparing nanoporous array anodic aluminum oxide (AAO) template with controlled pore size by two-stage anodic oxidation method, preparing graphene oxide nanosheets by Staudenmaier method, electrochemically etching the nanosheets, filtering through a polytetrafluoroethylene suction filter, obtaining a graphene oxide quantum dot solution, depositing graphene oxide quantum dot solution in the channels of the AAO template by electrochemical deposition, obtaining AAO/graphene oxide quantum dot nanotube array, depositing yttrium-cobalt oxide sol precursor on the quantum dot nanotube array using a vacuum spin coating method, and calcining. The graphene oxide/yttrium-cobalt oxide nanoarray electrode material is prepared with coaxial heterostructure. USE - Preparation of graphene oxide/yttrium-cobalt oxide nanoarray electrode material. ADVANTAGE - The method enables preparation of graphene oxide/yttrium-cobalt oxide nanoarray electrode material with improved energy density.