▎ 摘　　要

NOVELTY - A positive electrode material preparing method involves washing the metal foam, depositing multiple layers of graphene on the metal foam and removing deposited multi-layer graphene foam metal. Porous hole is formed on the surface of the three-dimensional graphene formed after removing the metal foam, followed by cleaning and drying to form multi-hole three-dimensional graphene. USE - Method for preparing positive electrode material for an aluminum ion battery. ADVANTAGE - The material has improved specific capacity.