Method for preparing graphene from electrochemical cathode striped graphite foil with TTAB (Tetradecyl Trimethyl Ammonium Bromide) as electrolyte

Abstract

The invention discloses a method for preparing graphene from electrochemical cathode striped graphite foil with TTAB (Tetradecyl Trimethyl Ammonium Bromide) as electrolyte. The method is characterizedby comprising the following steps: 1) preparing materials; 2) preparing an electric striping solution; 3) assembling an electric stripping device; 4) performing electric stripping; 5) performing filtration and washing; 6) performing ultrasonic dispersion; and 7) performing freeze drying on the obtained graphene solution, thereby obtaining graphene powder. The method has the advantages of being simple and easy in preparation raw material obtaining, easy in operation, low in cost, simple in process, simple in step and short in production period, and the prepared graphene is low in defect degree, small in layer number and very applicable to industrial production.

Description

technical field [0001] The invention relates to graphene technology, in particular to a method for preparing graphene by electrochemical cathode stripping graphite foil with TTAB as electrolyte. Background technique [0002] Graphene is a two-dimensional material with a thickness of only one carbon atom. 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, which is a new single-layer sheet-like material composed of carbon atoms. Graphene is not only the thinnest material, but also the strongest material. Its fracture strength is 200 times higher than that of the best steel. At the same time, it has good elasticity, and its stretching range can reach 20% of its own size. It is Currently the thinnest and strongest material in nature. At present, the most potential application of graphene is to become a substitute for silicon, to manufacture ultra-miniature transistors, to produce future supercomputers, to replace silicon with graphene, and the com...

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Problems solved by technology

Although utilizing the Hummers method to prepare graphene is widely used, in actual operation, this method has more steps and has more influence factors on the synthesis process, resulting in a lower yield of graphene, and the synthesized graphene The degree of defect is large and the quality is not high;

[0007] (3) Template method: This method uses graphene oxide as a raw material to form graphene oxide covering the template through electrostatic interaction or intermolecular force, and graphene can be prepared by reducing graphene oxide to graphene and removing the template. The biggest advantage of this method is that the pore size can be adjusted, that is, graphene with different pore sizes can be prepared by changing the template, but this method has many preparation procedures, the process is complicated, and it takes a long time;

[0008] The above-mentioned methods have a series of disadvantages, such as: the prepared graphene has a high degree of defect, the preparation process is complicated, the cost is high, it takes a long time, and it is not easy to operate, etc.

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