▎ 摘　　要

NOVELTY - An electrode material comprises copper-doped manganese(II,III) oxide/graphene oxide composite material. The molar ratio of copper/manganese is 0-10%. The mass percentage of graphene oxide in the composite material is 10%. USE - The electrode material is useful for a supercapacitor. ADVANTAGE - The electrode material has excellent electrochemical performance, and is cost-effective and environmentally-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the electrode material.