Mass production technique of graphene

Abstract

The invention discloses a mass production technique of graphene. The production technique for preparing graphene has the advantages of wide raw materials and low cost, can implement large-scale industrial production, and can simultaneously produce many types of graphene for different application fields. The prepared graphene product has the advantages of high yield, stable performance, no aggregation, low production cost and high production efficiency, overcomes the crystal structure defects, enhances the few layer rate of graphene, and implements industrialization on graphene application.

Description

technical field [0001] The invention relates to the field of graphene, in particular to a production process for preparing graphene in large quantities. Background technique [0002] Graphene is the thinnest and hardest nano-material known in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m K, which is higher than that of carbon nanotubes and diamonds; at room temperature, its Electron mobility over 15000cm 2 / V·s, which is higher than that of carbon nanotubes or silicon crystals; and the resistivity is only about 10 -6 Ω·cm, lower than copper or silver, is the material with the smallest resistivity in the world. [0003] There are many methods for preparing graphene, such as chemical vapor deposition and oxidation-reduction methods. Although these two methods can prepare single-layer graphene in large quantities, the transfer process of graphene in the later stage of the chemical vapor depositio...

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Problems solved by technology

Although these two methods can prepare single-layer graphene in large quantities, the transfer process of graphene in the later stage of chemical vapor deposition method is relatively complicated, and the preparation cost is high, and there are often defects in the growth and connection of carbon inside the substrate.

However, the preparation of graphene by the redox method is easy to agglomerate, resulting in a decrease in the electrical conductivity and specific surface area of ​​graphene, which further affects its application in optoelectronic devices; The loss of carbon atoms, etc., the production method restricts the industrialization of graphene

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