▎ 摘　　要

NOVELTY - The method involves adding hollow nano -carbon fiber as conductive agent to high-compact lithium-ion battery electrode sizing agent, coating the pole piece sizing agent on a current collector (4), and obtaining a pole piece by rolling and cutting, where the hollow nano carbon fiber is a hollow carbon fiber. The inner diameter of the tubular structure of the hollow carbon nano fiber is 150-200 nm. The pole element slurry after adding the hollow carbon nanofibers includes an active material, a conductive agent, a binder and a solvent, and the conductive agent includes the hollow carbon nanofibers. The conductive agent includes conductive carbon black, carbon nanotubes, and graphene. USE - Method for improving electrolyte wetting property of high pressure pole element of solid lithium ion battery used in vehicle. ADVANTAGE - The method construct electrolyte transmission microchannel which is good for pole element absorbing more electrolyte. The tubular structure can use capillary principle, the source continuously absorbs the electrolyte into the pole piece, keeping electrolyte amount in the pole portion, so that the lithium ion can be smoothly and quickly embedded, which is better for improving pole portion electrolyte wetting property, to improve the battery cycle life. The nano-carbon fiber further has good conductivity, large length-diameter ratio and specific surface area, which can connect the conductive network between the active material particles, to effectively avoid the problem of conductivity network damage caused by expansion and contraction of pole portion and to effectively improve battery performance. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the structure of the pole piece with hollow carbon nanofibers. Active material (1) Electrolyte (2) Hollow carbon nanofiber (3) Current collector (4)