▎ 摘　　要

NOVELTY - A nitrogen-doped graphene bi-metal oxide catalyst is prepared by dispersing metal salt A and B, and O. 5-1 M aniline hydrochloride into 0.5-1 mg/mL graphite oxide, adding catalyst for 24-48 hours, adding ammonium hydroxide and hydrazine hydrate at 110-150 degrees C for 20-24 hours, separating, drying under inert atmosphere, calcining at 850-950 degrees C for 0.5-3 hours at speed of 2-5 degrees C/minute, treating with 0.5-2 M sulfuric acid solution at 60-80 degrees C for 8-10 hours, cleaning, and calcining at 850-950 degrees C for 0.55-3 hours. USE - Method for preparing nitrogen-doped graphene bi-metal oxide catalyst used for lithium-air battery (claimed). ADVANTAGE - The catalyst improves lithium-air battery electrochemical property, and increases discharge platform and capacity.