▎ 摘　　要

NOVELTY - The cathode sheet comprises a current collector (1) whose upper and lower surfaces are coated with coatings (2,3), and surface density of the first coating is different from the surface density of the second coating. The surface density is not less than 300 g/m^2. The slurry of first coating comprises 94-96 %mass graphite, 1-1.5 %mass conductive agent, 1.5-2.5 %mass CMC, and 1.5-2 %mass butadiene styrene rubber. The slurry of the second coating comprises 92-96 %mass graphite, 1-3 %mass conductive agent, 3-5 %mass aqueous binder. The conductive agent comprises SuperP (RTM: Carbon black), carbon nanotubes, graphene, carbon fiber or Ketjen black (RTM: Carbon black). The aqueous binder comprises polyacrylic acid, polyacrylic acid lithium, sodium polyacrylic acid, polyacrylic acidpolyacrylonitrile copolymer, aqueous phenolic resin, aqueous epoxy resin, polyurethane emulsion, vinyl polyurethane emulsion, polyisocyanate emulsion or closed type polyurethane emulsion. USE - High surface density lithium battery cathode sheet for use in lithium battery used in vehicle. ADVANTAGE - The high surface density lithium battery cathode sheet has high energy density and long cycle performance, and avoids the pole portion resistance lifting and positive and negative distance increase caused by the lithium transmission distance, and increases cycle performance. The preparation process is simple, and the battery performance is improved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of high surface density lithium battery cathode sheet. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a cathode sheet. Current collector (1) First coating (2) Second coating (3)