石墨烯是由单层碳原子通过sp2杂化而构成的二维晶体材料，三维石墨烯是由

Graphene is a two-dimensional crystal material composed of a single layer of carbon atoms through sp2 hybridization. Three-dimensional graphene is a new type of carbon nanomaterial constructed from 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 Л-Л force between cc bonds, graphene is prone to agglomeration and stacking. And three-dimensional graphene not only has the advantages of graphene, but also has more excellent performance than two-dimensional graphene, making it widely used in thermal engineering, electronic equipment, energy storage and sensors. The preparation method of three-dimensional graphene is mainly prepared by a chemical preparation method. Chemical preparation methods include chemical vapor deposition method, oxidation-reduction graphene method, epitaxial growth method, axially split carbon nanotube method, solvent / hydrothermal method, directional flow assembly method, etc. The application of three-dimensional graphene in supercapacitors has also been a research boom in recent years. Supercapacitors are a new type of green energy storage device with high density power, fast charge and discharge speed, long life, green environmental protection and other advantages. The field of automobiles is widely used. This paper mainly reviews the structure, preparation method and application of three-dimensional graphene in supercapacitors.

Graphene is a two-dimensional crystal material composed of single-layer carbon atoms by sp2 hybridization, and three-dimensional graphene is a new carbon nanomaterial 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, but because of the strong Van der Waal and Ni?-Yu forces between the c-c bonds, graphene is prone to reunification and stacking. And 3D graphene not only has the advantages of graphene or even two-dimensional graphene has better performance, so that it is widely used in thermal engineering, electronic equipment, energy storage and sensors. The preparation method of 3D graphene is mainly prepared by chemical preparation. Chemical preparation method includes chemical vapor deposition method, oxidation-reduction graphene method, extended growth method, axially open carbon nanotube method, solvent/hydrothermal method, directional flow assembly method, etc. The application of 3D graphene in supercapacitors in recent years is also a research boom, supercapacitor is a new green energy storage device, with high density power, charge and discharge speed, long life, green environmental protection and other advantages, in the field of communications, aerospace, automotive is widely used, this paper mainly reviews the structure of 3D graphene, preparation methods and its application in supercapacitors.

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>