▎ 摘　　要

NOVELTY - The utility model claims a silicon carbon cathode pole piece, comprising a cathode collector and a cathode active material layer coated silicon-carbon two sides of the cathode current collector, the silicon-carbon negative active material layer comprises a common portion substantially parallel with the cathode current collector and the convex part is vertical to the common part, the convex part is on the said public part arranged at intervals, the silicon carbon cathode material layer is further coated with a layer of graphene layer, silicon-carbon negative electrode sheet of this utility model has higher specific capacity. the silicon-carbon negative active material layer set to be a concavo-convex structure, and can effectively relieve expansion and contraction of silicon material in the charging and discharging process, and coating a layer of graphene on the cathode material, has high charge carrier mobility, can be prevented in the process of charging and discharging on the surface of the cathode material of solid electrolyte interfacial film (SEI) of increased thickness, prevent the decrease of discharge capacity and improve the cycle performance of the battery.