▎ 摘　　要

NOVELTY - Negative pole piece comprises a negative electrode current collector and a negative electrode active material layer coated on one side or both sides of the negative electrode current collector. The negative electrode active material layer comprising a negative electrode active material, a conductive agent, binder and auxiliary agent, where the negative electrode active material includes carbon material. USE - Negative pole piece used in lithium ion battery (claimed). ADVANTAGE - The negative pole piece improves the internal resistance negative electrode the circulation process is increased and cycle life. DETAILED DESCRIPTION - Negative pole piece comprises a negative electrode current collector and a negative electrode active material layer coated on one side or both sides of the negative electrode current collector. The negative electrode active material layer comprising a negative electrode active material, a conductive agent, binder and auxiliary agent, where the negative electrode active material includes carbon material. The auxiliary agent is selected from methyl group containing derivative of formula R1-R-M-R'-R'1, where M is selected from polyphenylene ether segment, polyethylene glycol segment, polyethylene dithiol segment, polycarbonate segment, polypropylene glycol segment or polysiloxane segment. R1 and R'1=end-capping groups, carbon-carbon double bond or a carbon-carbon triple bond as an end group; and R and R'=linking groups.