▎ 摘　　要

NOVELTY - A negative electrode pole piece comprises a lithium iron phosphate material and a current collector, where the lithium iron phosphate material comprises spinning fibrous graphene and metallic lithium, the metallic lithium is uniformly distributed inside and on the graphene, and the metallic lithium distributed on the surface of the graphene is further coated with a carbon layer. USE - Negative electrode pole piece for lithium ion battery. ADVANTAGE - The negative electrode pole piece has excellent safety performance, high adhesion, improved cycle retention rate of battery, efficiency and energy density, and prolonged cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing negative electrode pole piece, which involves dispersing graphene in an organic solvent to obtain a dispersion liquid, adding an organic lithium solution to the dispersion to obtain a spinning solution, performing an electrospinning to the spinning solution, and obtaining the spinning fiber by utilizing an electrostatic spinning directly on the current collector to obtain a lithium supplementary pole piece, calcining the lithium-coated electrode pieces and coating with carbon source at a high temperature.