Method for recycling retired lithium battery negative electrode material

The invention relates to the field of lithium battery recovery, in particular to a method for recycling a retired lithium battery negative electrode material. The method comprises the following steps:dipping a negative electrode material obtained by disassembling a retired lithium battery into an N-methyl pyrrolidone solution, and standing until a copper foil is separated from a graphite matrix,so as to obtain a pre-sheet; placing the pre-sheet as a negative plate in a lithium electrolyte for discharge treatment, and removing residual impurities on the surface of the pre-sheet to obtain graphite flakes; and crushing and ball-milling the graphite flakes into graphite powder, and recycling graphene oxide through an oxidation stripping method. According to the invention, the retired lithiumpower battery negative electrode material can be reasonably and effectively utilized; single-layer graphene powder with relatively high quality can be prepared by adopting a proper process; and greateconomic benefits can be ge