▎ 摘　　要

NOVELTY - Preparing a cathode material coated with graphene-coated oxide-selenium composite aluminum battery involves mixing spherical oxide with uniform particle size and selenium powder and grinding according to the molar ratio of 3:1-9, and calcining at 200-500 degrees C for 2-12 hours under a protective atmosphere to obtain the oxide-selenium complex. The oxide-selenium complex is dissolved in an organic solution to make the surface of the oxide-selenium complex positively charged. The graphene is added to the solution to obtain a precursor of graphene-coated oxide-selenium composite under the action of static electricity. The precursor is calcined at 300-600 degrees C for 2-24 hours under a protective atmosphere to obtain a graphene-coated oxide-selenium composite aluminum battery cathode material. USE - Method for preparing a cathode material coated with graphene-coated oxide-selenium composite aluminum battery. ADVANTAGE - The method enables to prepare a cathode material coated with graphene-coated oxide-selenium composite aluminum battery, that realizes the surface coating of the oxide-selenium composite by graphene through electrostatic action, the surface coating layer avoids the dissolution of selenium and selenide in the electrochemical process, and improves the conductivity of the electrode material, and shows good charge and discharge capacity, rate performance and cycle performance in aluminum batteries.