▎ 摘　　要

NOVELTY - A trimanganese tetraoxide/graphene composite material preparing method involves mixing graphite oxide, manganese sulfate and water, stirring at room temperature for 1-10 hours, adding potassium permanganate, continuously stirring for 1-10 hours, dripping into the 30 wt.% hydrogen peroxide, ultrasonic for 1-10 hours, dripping hydrazine hydrate, raising temperature to 50-150 degrees C for 10-30 hours, water washing and drying the filtrate to obtain finished product. USE - Method for preparing manganese tetraoxide/graphene composite material that is utilized as anode material of high-performance lithium-ion batteries. ADVANTAGE - The composite material has high capacity, good conductivity, high cycling stability, good high-current discharge performance and other characteristics.