▎ 摘　　要

NOVELTY - Preparing carbon sheet cover film involves uniformly mixing carbon material, catalyst, binder, and solvent to obtain a slurry. The slurry is extruded and cut to obtain the rough product of the carbon sheet cover film. The carbon sheet cover film crude product is orderly dried and taken to obtain the carbon sheet cover film. USE - Carbon sheet cover film is set on the upper portion of the carbon bag in the carbon bag lithium battery (claimed). ADVANTAGE - The carbon sheet cover film: has good hardness and cutting performance, can satisfy the requirement of lithium battery core to different cover film shape, can solve the penetration, falling, and deformation that the glass fiber cover film is caused by soft texture is good for a barrier of carbon ball anode and lithium sheet cathode in different electric contact, avoids the influence of short circuit in the electric core to the service life and long-term reliability of the electric core, enhances the reduction activity of the cover film, can make the cover film participate in the lithium battery reaction process, as active substance reducing place so that the active substance can be reduced on the carbon sheet cover film.