▎ 摘　　要

NOVELTY - A lithium-ion battery silicon-carbon cathode pole piece comprises a negative electrode current collector and a film layer coated on the surface of the current collector. The film layer contains at least two negative electrode active material layers. USE - Silicon-carbon cathode pole piece used for lithium-ion battery. ADVANTAGE - The silicon-carbon negative electrode pole piece suppresses the expansion of the silicon-carbon negative electrode, improves the cycle performance of the battery, and at the same time increase the gram capacity of the negative electrode, so as to increase the energy density of the battery.