▎ 摘　　要

NOVELTY - The negative electrode with dual gradient changes in particle size-pore, has current collector and an active coating layer. The active coating layer is arranged on one side surface of the current collector. The active coating layer is provided with porous carbon and negative electrode active material. The porosity gradient of the porous carbon is gradually increased along the direction far away from the surface of one side of the current collector. The size gradient of negative electrode activated material is gradually reduced. The negative electrode active material includes graphite, soft carbon, hard carbon, carbon nanotubes and graphene. USE - Negative electrode with dual gradient changes in particle size-pore, used in lithium-ion battery (claimed). ADVANTAGE - The gradient structure of the pores is conducive to the diffusion of the electrolyte and the sedimentation of the negative active material. The size gradient of the negative electrode active material is increased from the bottom to the top. The change of particle size can ensure higher active material utilization and tap density of negative electrode. The negative electrode has higher capacity and better cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of negative electrode with dual gradient changes in particle size-pore. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of the negative electrode with dual gradient changes in particle size-pore. (Drawing includes non-English language text).