Preparation method of polyaniline/graphene layered composite material

The invention relates to the technical field of composite materials, and particularly discloses a preparation method of a polyaniline/graphene layered composite material. Preparation of the polyaniline/graphene layered composite material is carried out in a high-pressure kettle, under the state that an aniline solution and graphite are not premixed, firstly, the advantage that the volume size of supercritical CO2 molecules is adjustable is utilized, and then the polyaniline/graphene layered composite material is prepared; by reducing the pressure, the volume of supercritical CO2 molecules inserted between graphite layers is enlarged, so that the spacing between the graphite layers is further enlarged, and then the advantages of high solubility and good diffusion performance of supercritical CO2 fluid are utilized, so that aniline molecules and catalyst molecules are dissolved and inserted between the graphite layers; the polyaniline/graphene layered composite material is obtained through one step of in-situ p