▎ 摘　　要

NOVELTY - Improving electrochemical performance of nickel (Ni)-cobalt (Co)-manganese (Mn) ternary material with highly dispersed graphene involves treating graphene powder with active agent comprising nitric acid, hydrogen peroxide and phosphoric acid, mixing with wet grinding media, ultrasonicating mixture, adding Ni-Co-Mn ternary material to obtain precursor, subjecting to vacuum at not greater than 1 atm, drying, and sintering in air atmosphere and in air or pure oxygen atmosphere sequentially. USE - Method for improving electrochemical performance of Ni-Co-Mn ternary material with highly dispersed graphene. ADVANTAGE - The method has cheap materials with wide source, and simple process. The method also has lesser sewage discharge in comparison with coprecipitation method. The obtained material does not contain LiMn6 superlattice structure which results to electrode material with good consistency, uniform composition, and excellent discharge performance. DETAILED DESCRIPTION - Improving electrochemical performance of Ni-Co-Mn ternary material with highly dispersed graphene comprises mixing graphene powder and active agent at 1:5-100 mass ratio at 40-95 degrees C for 10-100 minutes, washing with deionized water until washing solution is neutral, filtering, mixing residue with 5-1000 times by volume wet grinding media, ultrasonicating mixture for 5-100 minutes to intercalated graphene solution, mixing solution and Ni-Co-Mn ternary material at 5-100:1 volume ratio to obtain precursor, subjecting precursor to vacuum at not greater than 1 atm, drying at 130-270 degrees C, sintering in air atmosphere at 800-950 degrees C for 0.1-300 minutes, cooling in air or pure oxygen atmosphere at 1-50 degrees C/minute speed to 200-450 degrees C, and keeping warm for 1-600 minute. The active agent comprises 68 wt.% nitric acid, 30 wt.% hydrogen peroxide and 85 wt.% phosphoric acid at 1:0.1-0.5:1-4 mass ratio.