▎ 摘　　要

NOVELTY - Preparation of hydrogen-absorbing alloy-graphene composite involves adding rare-earth element having purity of 99.5% and other metal elements into an electric arc furnace, melting, obtaining ingot, performing annealing and mechanical polishing, obtaining master alloy powder, adding graphene oxide obtained by Hummers method, performing hydrazine hydrate reduction process and annealing in mixture of argon gas hydrogen. The rare-earth element is chosen from cerium, lanthanum and yttrium. The other metal elements are chosen from nickel, cobalt, aluminum and manganese. USE - Preparation of hydrogen-absorbing alloy-graphene composite used as cathode material (claimed) for nickel-hydrogen battery. ADVANTAGE - The method efficiently provides hydrogen-absorbing alloy-graphene composite by simple process. The nickel-hydrogen battery obtained using the hydrogen-absorbing alloy-graphene composite has high-rate discharge performance and discharge current density of 3000 mA/g when capacity retention rate is 51.25%. DETAILED DESCRIPTION - Preparation of hydrogen-absorbing alloy-graphene composite involves adding rare-earth element having purity of 99.5% and other metal elements having purity of 99.9%, into an electric arc furnace, melting, obtaining ingot, performing annealing and mechanical polishing, obtaining master alloy powder having average particle diameter of 50 mu m, adding graphene oxide obtained by Hummers method, performing hydrazine hydrate reduction process and annealing in mixture of argon gas hydrogen. The rare-earth element is chosen from cerium, lanthanum and yttrium. The other metal elements are chosen from nickel, cobalt, aluminum and manganese.