▎ 摘　　要

NOVELTY - Graphene-manganese cathode material preparation involves mixing lithium hydroxide and dimanganese trioxide with a molar ratio of 1-5:1, pouring into a beaker containing deionized water with dispersing uniformly, and then adding ammonia water under high pressure conditions at 100-160 degrees C. The magnetic stirring reaction is carried out for 3-15 hours, where the aqueous ammonia and the lithium hydroxide are provided in a molar ratio of 5-25:1. The obtained product is vacuum-filtered, vacuum-dried at 75-80 degrees C for 10-15 hours, ground into a powder, calcined at 200-300 degrees C for 2-6 hours, and then ground to the lithium manganate powder. The obtained lithium manganate powder is added to a certain concentration of graphene oxide solution with stirring magnetically, dried at 100-120 degrees C, and then ball milled for 12-36 hours to obtain the graphene-manganic acid. USE - Method for preparing graphene-manganese cathode material for lithium ion battery. ADVANTAGE - The method prepares the cathode material of graphene-manganese acid battery in a simple, cost-effective and eco-friendly manner with good electrical conductivity and good stability.