▎ 摘　　要

NOVELTY - The electrode has a current collector and n layers of pole sheets stacked on the current collector where n is an integer greater than 2. The pole portion layer contains a pore-forming agent (BB). The content of the pore-forming agent in each layer of the pole portion layer gradually increases along the direction gradually away from the current collector. The pore-forming agent is selected from electrolyte additives that are solid at normal temperature. The pole portion layer contains an active material. The content of the pore-forming agent in the pole piece layer of the first layer is 0-4 parts by weight with respect to 100 parts by weight of the active material, along the direction gradually away from the current collector. USE - Electrode used in lithium ion battery (claimed). ADVANTAGE - The electrode has improved surface density and compaction density lithium of the ion battery, which can effectively improve the energy density of the lithium ion battery. The pore-forming agent is selected from solid electrolyte additive at normal temperature, thus improving the internal pore structure distribution of the electrode, and hence improving the electrode dynamics performance. The electrode is laminated on the current collector of the n-layer pole layer, so that the pore bending degree and the lithium path of the active material in the electrode can be lengthened, thus increasing the impedance of electrode, so as to influence the dynamic performance of electrode in the process of improving the surface density of electrode. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method for preparing lithium ion battery electrode; and a lithium ion battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an electrode. (Drawing includes non-English language text) AAElectrode plate layer BBPore-forming agent CCElectrode immersion DDPore structure