▎ 摘　　要

NOVELTY - The method involves disassembling a battery after waste lithium ion battery is completely discharged. Crude negative electrode carbon material is soaked in solvent. A copper foil is completely separated from graphite. Copper foil filtering, washing and drying process is performed to obtain negative electrode carbon material coarse product. Negative electrode carbon material ultrasonic vibrating, filtering and drying process is performed to obtain eutectic solvent. The graphene is prepared by using Hummers oxidation process. The negative electrode carbon material product is coated with the eutectic solvent. USE - Method for producing graphene by recycling graphite in waste lithiumion battery negative electrode material. ADVANTAGE - The method enables reducing cost and environment-friendly eutectic solvent extraction and recycling process in waste lithium ion battery negative electrode material to prepare graphene by Hummers oxidation as raw material, performing eutectic solvent extraction of the negative electrode carbon material after washing in residual metal content so as to ensure high recovery rate, appearance, complete structure and better practical value. DESCRIPTION OF DRAWING(S) - The drawing shows a photographic view of a graphene.