Preparation method and wave-absorbing application of graphene-based metal composite material

The invention discloses a preparation method of a graphene-based metal composite material. The preparation method comprises the following steps: mixing and ball-milling a solvent and a template to obtain a template solution, mixing and ball-milling the template solution, an acrylonitrile-polymer monomer and a metal catalyst to uniformly disperse the substances, adding an initiator, drying to obtain a mixture of a precursor and the template, carrying out high-temperature treatment on the mixture, and washing and drying to obtain the graphene-based metal composite material. The graphene-based metal composite material has very good wave-absorbing performance, and the invention further provides application of the material in the technical field of wave absorbing. The preparation method has the advantage of low cost, large-scale production is easy, and the prepared product can be widely applied to the fields of composite materials, machining and new energy materials and is used for absorbing electromagnetic waves.