▎ 摘　　要

NOVELTY - Preparing neodymium (Nd)-graphene composite material comprises (i) taking foam nickel as substrate, using carbon-containing gas as carbon source, using chemical vapor deposition method to grow graphene on the surface of the foam nickel substrate to obtain graphene foam nickel material; and (ii) preparing Nd simple substance on the graphene surface of graphene foam nickel material. USE - The neodymium-graphene composite material is used as an electrode material in electrolytic water hydrogen production device or as cathode material in fuel cell or metal-air battery (claimed). ADVANTAGE - The composite material has a self-supporting structure and does not need a binder during use. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for neodymium-graphene composite material, is prepared by the preparation method.