▎ 摘　　要

NOVELTY - Preparing graphene-modified high-nickel cathode material involves using spray drying process and adding nickel-cobalt-manganese or nickel-cobalt-aluminum hydroxide high-nickel precursor or nickel-cobalt-manganese or nickel-cobalt-aluminum carbonate high nickel precursor and lithium source in a molar ratio of lithium ion to metal ion (1.0-1.12):1 and uniformly mixing. The mixed material is treated in oxygen atmosphere, and calcined at 600-1000 degrees C for 10-30 hours to obtain high-nickel primary calcined material, followed by pulverizing with classification frequency of 15-25 hertz to obtain high-nickel primary pulverized material, followed by first adding dispersant to solvent and uniformly mixing to form first solution, and then sticking addition agent to first solution to dispersed uniformly to form second solution. USE - Method for preparing graphene-modified high-nickel cathode material. ADVANTAGE - The method enables to prepare graphene-modified high-nickel cathode material which is excellent, and suitable for industrial production. DETAILED DESCRIPTION - The graphene is added to second solution and uniformly dispersed into uniform emulsion to obtain third graphene conductive paste at 10-150 degrees C to obtain oxygen source, and mixing high-nickel primary pulverized material in a certain ratio in container for a certain time to obtain an oxide-precoated high-nickel material, and then treating at 10-60 degrees C. The oxide-precoated high-nickel material is pressed by adding a certain proportion of third graphene conductive paste uniformly, forming graphene mixed slurry IV, drying graphene mixed slurry with spray dryer to obtain graphene-coated high nickel powder, and calcining at 100-800 degrees C in an oxygen atmosphere for 10-20 hours to obtain graphene-modified high-nickel secondary baking material which is then pulverized and sieved to obtain graphene-modified high-nickel cathode material.