▎ 摘　　要

NOVELTY - Preparation of graphene current collector involves ultrasonically dispersing oxidized graphene, filtering to obtain oxidized graphene film, heating under hydrogen and argon atmosphere, carrying out high-temperature annealing and reduction to obtain a graphene film, cooling, taking out, slicing the graphene film in a direction perpendicular to the stack of graphene sheets. The volume ratio of the hydrogen gas and the argon gas is 1:3-7. The total flow rate of mixed hydrogen gas and argon gas is 10-30 sccm. The thickness of the graphene film slice is 10-20 microns. USE - Preparation of graphene current collector (claimed). ADVANTAGE - The method enables preparation of graphene current collector, which has large specific surface area, high conductivity, excellent adhesion property with active electrode material and effectively prevents omission of the electrode active material. DETAILED DESCRIPTION - Preparation of graphene current collector involves ultrasonically dispersing oxidized graphene for 4-7 hours, filtering using filter pump of 1 cm or more to obtain oxidized graphene film, heating at a rate of 1-3 degrees C/minute under high vacuum in hydrogen and argon atmosphere, carrying out high-temperature annealing and reduction at 2500-3000 degrees C for 40-60 minutes to obtain a graphene film, naturally cooling to room temperature, taking out, slicing the graphene film in a direction perpendicular to the stack of graphene sheets. The volume ratio of the hydrogen gas and the argon gas is 1:3-7. The total flow rate of mixed hydrogen gas and argon gas is 10-30 sccm. The high vacuum has vacuum degree of 50-80 mTorr. The thickness of the graphene film slice is 10-20 microns. The surface of the graphene current collector is fully stacked with graphene sheets.