▎ 摘　　要

NOVELTY - Positive plate of high-rate lithium ion battery comprises current collector and positive coating. The positive coating comprises first coating and second coating. The coating is coated on surface of current collector. The second coating is coated on the surface of the first coating. USE - Positive plate of high-rate lithium ion battery. ADVANTAGE - The prepared positive plate has thickness of more than 400 mu m gradually increases in porosity from bottom to top, which is conducive to the deintercalation of lithium ion and the infiltration of electrolyte. The nickel cobalt lithium manganate positive electrode active material is close to the current collector aluminum foil, which is conducive to electron transmission, so as to reducing polarization. The lithium ion battery has high energy density, excellent high rate performance, safety and cost-effective. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for preparing positive plate of high-rate lithium ion battery, which involves performing dry mixing the first positive electrode active material, conductive agent SP and first binder respectively, adding dispersant, carbon nanotube, graphene mixed conductive agent, and solvent, mixing, stirring uniformly, reaching the viscosity of 7000-9000 millipascal second, solid content is 70-80%, preparing into first positive electrode slurry, performing dry mixing the second positive electrode active material, conductive agent SP and second binder respectively, adding dispersant, carbon nanotube, graphene mixed conductive agent, and solvent, mixing, stirring uniformly, reaching the viscosity of 5000-8000 millipascal second, solid content is 50-60%, preparing second positive electrode slurry, coating the surface of the current collector with the obtained positive electrode slurry, coating the surface of the positive electrode slurry with second positive electrode slurry, and drying to obtain a positive electrode sheet with a thickness of more than 400 mu m; and (2) a lithium ion battery, which comprises positive electrode sheet, negative electrode sheet, separator and electrolyte, where the positive electrode sheet adopts the high-rate lithium ion battery positive electrode sheet.