▎ 摘　　要

NOVELTY - Cathode pole piece comprises a current collector, and an active layer comprises a first active material, a second active material, an adhesive and a conductive agent, where gram capacity of the first active material is higher than that of the second active material. The active layer is positioned on the surface of the current collector, and the volume expansion rate of the first active material is higher than that of the second active material. The content of the adhesive decreased in a direction away from the current collector. USE - Cathode pole piece used in lithium-ion battery (claimed). ADVANTAGE - The cathode pole piece is helpful for prevents active layer of the battery from falling off, improves conductivity of electrode pole piece, and further improves cycle performance and battery capacity of battery, which is good for the capacity of the active material, and there are many binders in the active layer in contact with the current collector, which suppresses the large volume expansion of the first active material, prevents the active layer from falling off, and also prevents the active layer from falling off and improve battery cycle performance.