▎ 摘　　要

NOVELTY - The method involves including mixing the graphene-containing coated single crystal cathode material with a conductive agent and a binder, then adding N-methylpyrrolidone to adjust the solid content, and coating on a current collector. The graphene-containing coated single crystal positive electrode material is obtained by mixing a graphene-containing glue solution with a positive electrode active material to obtain slurry, and drying the slurry. The positive electrode active material is a single crystal material with a single crystal morphology, including lithium cobalt oxide (LiCoO2) and lithium-ion battery positive material lithium nickel manganese cobalt (LiNixCoyMnzO2) and lithium nickel cobalt aluminum oxide (LiNixCoyAlzO2). The crystal structure is layered and belongs to the R-3m space group. USE - Method for preparing lithium ion battery electrode containing graphene-coated single crystal positive electrode material. ADVANTAGE - The graphene covered by this morphology will not change the original crystal phase structure and size of the single crystal cathode material, which is conducive to the lower impedance of the prepared lithium ion battery, higher cycle capacity retention at 45 degrees C, and high rate discharge And the charging capacity retention rate is higher, and the overall performance of the lithium-ion battery is optimized. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view illustrating the process for preparing lithium ion battery electrode containing graphene-coated single crystal positive electrode material. Graphene sheet diameter (1,3) Single crystal cathode material (2,4)