▎ 摘　　要

NOVELTY - A metal-air cell electrode graphene catalyst preparing method involves mixing alkylene oxide powder and graphite powder in lanthanum nickelate to obtain mixed powder. The mixed powder is slowly added with 10 ml distilled water, and treated with ultrasound to break up into a uniform suspension, followed by adjusting pH with aqueous sodium hydroxide, placing in water bath at 50-70 degrees C, stirring for 30 minutes, slowly adding carboxymethylcellulose sodium, stirring slowly to obtain colloidal solution i.e. graphene/ lanthanum nickelate complex catalyst. USE - Method for preparing metal-air cell electrode graphene catalyst. ADVANTAGE - The catalyst has high efficiency, low cost, high-yield, high conductivity, and heat dissipation characteristics.