▎ 摘　　要

NOVELTY - Negative electrode comprises a current collector and a negative electrode active layer comprising a negative electrode active material (A) comprising graphite, a negative electrode active material (B) comprising graphene-coated silicon oxide material (I), a conductive agent, and a binder. USE - The negative electrode is useful for lithium ion battery (claimed). ADVANTAGE - The negative electrode largely suppress the pulverization caused by the volume change of the graphene-coated silicon oxide material during charging and discharging, improves the safety performance and cycle performance of the battery, and ensures the energy density of the battery, and ensures improved the cycle life of the battery. DETAILED DESCRIPTION - Negative electrode comprises a current collector and a negative electrode active layer comprising a negative electrode active material (A) comprising graphite, a negative electrode active material (B) comprising graphene-coated silicon oxide material of formula: SiOx (I), a conductive agent, and a binder. x = 0-2. An INDEPENDENT CLAIM is included for a method for preparing the negative electrode, involving mixing the above-mentioned components to obtain a negative electrode slurry, and coating the negative electrode slurry on the surface of the current collector to obtain the electrode.