▎ 摘　　要

NOVELTY - The method involves drying the polytetrafluoroethylene, the conductive agent, and the active material mixed with a two-way mixer until uniform. The solvent is pyrrolidone, dimethicone, ethylene glycol, propylene glycol, butylene glycol, dimethylformamide, and paraffin oil. The dough mixture is transported into a double-speed rolling mill through a screw extruding device for rolling to obtain a film sheet, and the solvent is removed from the film sheet to obtain a fiber film sheet. The positive electrode material is lithium iron phosphate, nickel-cobalt-manganese ternary material-111 type, 523 type, 811 type, nickel-cobalt-aluminum, lithium cobaltate, lithium manganate, mixtures of Prussian blue sodium cathode and layered oxide sodium cathode. The negative electrode material is mixture of graphite, carbon microsphere, silicon carbon negative electrode material, hard carbon negative electrode material, activated carbon negative electrode material, graphene and activated carbon. USE - Method for preparing fiber membrane for lithium ion battery. ADVANTAGE - The flexibility and impact resistance is good, the internal resistance of the electrode pole portions are greatly reduced, and the energy density and safety of the lithium ion battery is effectively improved. The pole portion material is not brittle, and the pole portions density is uniform and adaptability is better. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing pole portion. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram of the preparation method of the fiber membrane. (Drawing includes non-English language text).