Graphene is a two-dimensional crystal material composed of a single carbon atom through SP2 hybridization. Three-dimensional graphene is a new type of carbon nano material constructed by two-dimensional graphene on a macro scale. Graphene has excellent physical and chemical properties such as high conductivity, high strength, transparency and high thermal conductivity. However, due to the strong van der Waals force and the lateral - lateral force between C-C bonds, graphene is easy to agglomerate and stack. The three-dimensional graphene not only has the advantages of graphene, but also has more excellent properties than the two-dimensional graphene, which makes it widely used in thermal engineering, electronic equipment, energy storage and sensors. Three dimensional graphene is mainly prepared by chemical method. Chemical preparation methods include chemical vapor deposition, oxidation-reduction graphene method, epitaxial growth method, axial split carbon nanotubes method, solvent / hydrothermal method, directional flow assembly method, etc. In recent years, the application of 3D graphene in super capacitor is also a research upsurge. Super capacitor is a new type of green energy storage device, which has the advantages of high-density power, fast charging and discharging speed, long life, green environmental protection and so on. It is widely used in the fields of communication, Aerospace and automobile. This paper mainly reviews the structure, preparation method and application of 3D graphene in super capacitor Applications in capacitors.<br>
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