▎ 摘　　要

NOVELTY - Cathode sheet comprises a current collector (1), a cathode slurry layer and multiple graphene composite sheet layers. The cathode silt layer is arranged on the surface of one side of the current collector. The graphene composite sheets are arranged on one side surface of the cathode sulfurry layer on the same surface as the current current collector and the graphene composite layer and the current converter are respectively located on the surfaces of both sides of the silt. Each of the graphene complex sheet layers includes at least two laminated graphene single sheet layers, and in the graphene composite sheet layer, and the cathodetermining layer is connected to the direction far away from the cathodesulfurry layer, so that the area of the single sheet layer gradually decreases. USE - The cathode sheet is useful in a negative pole piece of a lithium ion battery that is used as a power source of a new energy automobile. ADVANTAGE - The cathode sheet is simple and easy to carry out, safety-friendly, high productivity in good product, and has good economic benefit. The electrolyte stored in the graphene composite sheet layer is gradually released by diffusion, maintaining the consumption of the electrolyte in the battery, and ensuring the normal use of the battery. The lithium ion battery has longer using period and higher safety performance. DESCRIPTION OF DRAWING(S) - Current collector (1) First graphene composite sheet (3) First cathode slurry layer (201) Bottom first graphene single sheet (301) Middle first graphene single sheet (302) Upper first graphene single sheet (303)