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METHOD FOR GRAPHEN OBTAINING WO2018084739
[Category : - ELECTRONICS- ELECTRICITY & LIGHTING- RENEWABLE ENERGY]
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METHOD OF OBTAINING GRAPHENE
An international search report and a written report from the international search authority have been received with a valid statement of the invention's compliance with the criteria of novelty, inventive step and industrial applicability.
The process is performed in the regime of electrodynamic fluidization of graphite particles in a vacuum, and conditions are created for which the energy of the graphite particles exceeds the work necessary for their separation into layers during brittle fracture along cleavage planes resulting from impacts of particles on the electrodes.
nanotechnology.SUBSTANCE: graphite particles are placed in a vacuum between electrodes, with potential difference being set sufficient for electrodynamic fluidization of the particles and obtaining energy higher than the work required to split them along the cleavage planes into graphene layers during brittle fracture during impacts against the electrodes. Graphite with a density of 2.3∙10kg/m, with particles less than 1 mm is used.EFFECT: increased productivity of high purity graphene obtaining.2 cl
Financial information
1 kg of graphene at the price of 1 kW / h
As a starting material, graphite grains obtained by crushing pyrolytic graphite up to a millimeter in size can be used. A promising material can be graphite grains obtained by carbonization and graphitization of fine anthracite fractions (less than 6 mm - shtyb) in electrocalcinators.
Since the energy in this process is spent mainly on splitting of graphite burrs, the specific energy expenditure for obtaining graphene from graphite chips is close to the theoretical value of 0.23-0.25 kWh / kg. The productivity of the process is determined by the area of the electrodes and based on the results of computer simulation up to several tens of kilograms per square meter
Patent publications:
RU 2632688
US 11136240
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