Graphene/copper composite conductive material and preparation method thereof

Abstract

The invention discloses a graphene / copper composite conductive material and a preparation method thereof. The graphene / copper composite conductive material is formed by dispersing graphene in a coppermatrix uniformly. The preparation method comprises the steps that firstly at least one surface of an organic polymer thin film is exposed to laser irradiation, and the surface of the organic polymeris carbonized to form the graphene and presents a three-dimensional porous structure; then the graphene and substrate are put into a copper sulfate plating solution and subjected to electrochemical copper plating to form the graphene / copper composite material; the drying treatment in vacuum atmosphere is further carried out, and a composite material is stripped from the substrate; and finally thegraphene / copper composite conductive material is obtained through compression molding and high temperature sintering. According to the graphene / copper composite conductive material, because of the uniform distribution of the graphene in the copper matrix, good mechanical properties and electrical properties are achieved, the preparation method is simple in operation, raw materials are easy to obtain, and the graphene / copper composite conductive material meets different application demands, especially in the field of copper cables; and the graphene / copper composite conductive material is convenient to popularize.

Description

technical field

[0001] The invention relates to the field of graphene-based composite materials, in particular to a graphene / copper composite conductive material and a preparation method thereof. Background technique

[0002] Graphene is a two-dimensional material with a honeycomb structure formed by a single layer of carbon atoms. Due to its unique structure, it has excellent properties in the fields of electricity, optics, chemistry, mechanics and thermals. In terms of electricity, the electron mobility in graphene can reach 15000cm 2 / (V·S), about 140 times the electron mobility in silicon. In terms of mechanics, the tensile strength and elastic modulus of graphene reach 125GPa (single-layer graphene) and 1.1TPa, respectively, which are about 100 times the tensile strength of ordinary steel. Thermally, the thermal conductivity of graphene at room temperature is about 5×103W m -1 K -1 , which is higher than that of carbon nanotubes and diamond, and is the thermal condu...

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