▎ 摘　　要

NOVELTY - A metal-air battery positive electrode material is prepared by coating a resin material or an amorphous titanium oxide on the surface of copper hydroxide nanowires of copper hydroxide nanowire-modified foamed copper to obtain a coating material, heating the coating material in a reducing atmosphere when the surface of the copper hydroxide nanowires is coated with the resin material, and carbonizing the resin material to obtain a composite gas diffusion electrode, or heating the coating material in a reducing atmosphere when the surface of the copper hydroxide nanowires is coated with amorphous titanium oxide, and then nitriding to convert the titanium-containing compound into titanium nitride to obtain a composite gas diffusion electrode, depositing graphene on the titanium nitride layer or carbon layer of the composite gas diffusion electrode to obtain a deposition material, and then loading catalyst nanoparticles on the graphene surface of the deposition material. USE - Metal-air battery positive electrode material for lithium metal-air battery. ADVANTAGE - The metal-air battery positive electrode material has a composite multi-level nanostructure, which is good for large amount deposition of the discharge product, and the high-conductivity copper-based nanowire and three-dimensional framework network can generate synergetic effect with the high catalytically active nanoparticles for accelerating decomposition of the discharging product to improve the cycle performance of the lithium metal-air battery. DETAILED DESCRIPTION - A metal-air battery positive electrode material is prepared by preparing copper hydroxide nanowire-modified foamed copper by in-situ generation of copper hydroxide nanowires on the foamed copper, coating a resin material or an amorphous titanium oxide on the surface of copper hydroxide nanowires of the copper hydroxide nanowire-modified foamed copper to obtain a coating material, heating the coating material in a reducing atmosphere to reduce the copper hydroxide to copper when the surface of the copper hydroxide nanowires is coated with the resin material, and carbonizing the resin material to obtain a composite gas diffusion electrode, or heating the coating material in a reducing atmosphere when the surface of the copper hydroxide nanowires is coated with amorphous titanium oxide, and then nitriding to convert the titanium-containing compound into titanium nitride to obtain a composite gas diffusion electrode, depositing graphene on the titanium nitride layer or carbon layer of the composite gas diffusion electrode by chemical vapor deposition method to obtain a deposition material, and then loading catalyst nanoparticles on the graphene surface of the deposition material.