▎ 摘　　要

NOVELTY - Preparation of composite catalyst, involves mixing graphene oxide with a manganese salt to obtain a mixture, and reacting the mixture with a nickel salt. USE - Preparation of composite catalyst for cathode (claimed) used in battery e.g. aluminum air cell. ADVANTAGE - The method uses one-step hydrothermal method to prepare the manganese-nickel/reduced graphene oxide nano-composite material. The strong interaction of chemical bonding improves the structure stability of the material, forms stable three-phase state, and makes the multi-component uniform mixing. Particle agglomeration is reduced, material crystallinity is high, and the method effectively improves the oxygen evolution catalytic activity of material and optimizes the oxygen reduction activity. The composite catalyst prepared by the method has good catalytic performance.