Preparation method of graphene/CNT (carbon nanotube) composite material

The invention provides a preparation method of a graphene/CNT (carbon nanotube) composite material. The preparation method is characterized by comprising the following steps of (1) preparing of graphene acidifying matter; (2) adding of the graphene acidifying matter into CNT fibers; (3) sticking of the added graphene acidifying matter into the CNT fibers. The preparation method has the advantages that the graphene is treated into the CNT fibers by the simple technology, the prepared fiber has electric conductivity, heat releasing property, heat conductivity, high strength, non-acidifying property and the like, and the advantages of the CNT and the graphene are combined; the heat conductivity of the graphene/CNT composite material can reach about 5000 to 5300W.mK at room temperature, the heat conductivity is obviously higher than the heat conductivity of graphene and CNT, and the effect of using as the heat conduction material is better. 本发明提供了种石墨烯/纳米碳管复合材料的制备方法，其特征在于：包括如下步骤：(1)石墨烯酸化物制造的阶段；(2)石墨烯酸化物投入到CNT纤