▎ 摘　　要

NOVELTY - A graphene-modified high-nickel cathode material preparing method involves mixing nickel-cobalt-manganese or nickel-cobalt-aluminum hydroxide or nickel-cobalt-manganese or nickel-cobalt-aluminum carbonate and lithium source, mixing the mixed material under oxygen atmosphere, calcining to obtain high nickel primary roasting material, crushing, to obtain high nickel primary crushed material, adding the dispersant to the solvent to form solution I, adding the binder to the solution I disperse to form the solution II, adding the graphene to the solution II disperse to form the graphene conductive paste III, stirring the graphene conductive paste III and the high-nickel primary pulverized material in an open container, standing and depositing for a certain time, filtering and drying, introducing mixed gas under the condition of the material after drying, calcining to obtain graphene-modified high-nickel secondary baking material, crushing to obtain the finished product. USE - Method for preparing graphene-modified high-nickel cathode material. ADVANTAGE - The method enables preparing graphene-modified high-nickel cathode material with the multiplying power performance, excellent high temperature cycle performance and suitable for industrial production. DETAILED DESCRIPTION - A graphene-modified high-nickel cathode material preparing method involves mixing a molar ratio of lithium ion to metal ion in the 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 (1.0-1.12):1, mixing the mixed material under oxygen atmosphere, calcining at 600-1000 degrees C for 10-30 hours to obtain high nickel primary roasting material, after crushing, grading frequency 15-25 Hz to obtain high nickel primary crushed material, adding the dispersant to the solvent uniformly to form solution I, adding the binder to the solution I uniformly disperse to form the solution II, adding the graphene to the solution II uniformly disperse to form the graphene conductive paste III, the state of the slurry is a uniform emulsion, stirring the graphene conductive paste III and the high-nickel primary pulverized material in an open container at a certain ratio at a temperature of 10-60 degrees C for a certain period of time, standing and depositing for a certain time, filtering and drying, introducing mixed gas under the condition of the material after drying, calcining at 100-600 degrees C for 10-20 hours to obtain graphene-modified high-nickel secondary baking material, crushing and grading frequency 15-25 Hz to obtain the finished product.