▎ 摘　　要

NOVELTY - A beta -manganese oxide nitrogen-doped graphene composite electrode nanomaterial preparing method involves dissolving graphene in water to obtain solution A, mixing solution A with nickel nitrate hexahydrate aqueous solution to obtain mixture B, dispersing mixture B with hexamethylenetetramine to obtain mixture C, followed by heating mixture B, titrating mixture B and C, heating titrated mixture to obtain mixture D, transferring mixture D into reaction kettle to obtain mixture E, filtering, washing and drying mixture E to obtain mixture F and placing in furnace to obtain finished product. USE - Method for preparing a beta -manganese oxide nitrogen-doped graphene composite electrode nanomaterial. ADVANTAGE - The method enables the beta -manganese oxide nitrogen-doped graphene composite electrode nanomaterial with better circulation stability and uniform dispersion. DETAILED DESCRIPTION - A beta -manganese oxide nitrogen-doped graphene composite electrode nanomaterial preparing method involves dissolving oxidized graphene ultrasonically in water to obtain a uniform oxide graphene solution A. The uniform oxide graphene solution A is mixed ultrasonically with nickel nitrate hexahydrate aqueous solution to obtain a mixture B. The mixture B is dissolved using hexamethylenetetramine with water to obtain a mixture C. The mixture B is heated at 80 degrees C in a water bath under stirring with N,N-dimethylformamide, followed by titrating the mixture B and mixture C at pH 6-8.5 and heating the titrated mixture for 2 hours to obtain a mixture D. The mixture D is transferred into a hydrothermal reaction kettle for carrying out thermal reaction at a constant temperature to obtain a mixture E. The mixture E is filtered, washed and dried to obtain a mixture F. The mixture F is placed in a muffle furnace at constant temperature to obtain the finished product.