| 摘要 |
Disclosed is a preparation method of graphene film. The method comprises the following steps: providing a clean substrate, followed by positively charged processing of the substrate surface; preparing suspension of graphene with negative charges on surface and the suspension of graphene with positive charges on surface respectively; immersing the surface-treated substrate into the suspension of graphene with negative charges on surface for 5-20 minutes, then taking the substrate out, washing, drying, and then immersing it into the suspension of graphene with positive charges on surface for 5-20 minutes, then taking the substrate out, washing, drying, so alternately repeated 10 to 50 times to obtain a graphene film precursor, and finally reducing the graphene film precursor at 500-1000°C to obtain the grapheme film. The preparation method of graphene film provided by this invention is simple, the thickness of the film is able to control easily, and the graphene film provided by this invention is light, strongly conductive, and can be used as collector of super capacitors and lithium-ion batteries. |
