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Novel preparation method of graphene
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A graphene, a new type of technology, applied in the field of lighting, can solve the problems of low work efficiency and high cost, and achieve the effect of saving costs and improving work efficiency
Inactive Publication Date: 2018-04-06
CHENGDU GELAIFEI TECH
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[0004] When the common graphene is now prepared, the graphene powder is usually placed in deionized water, or in a mixture of deionized water and ethanol, and the graphene powder is suspended in deionized water, or by stirring or ultrasonic waves. In the mixture of deionized water and ethanol, but this can only suspend a part of the graphene powder, and there are quite a lot of powders that are not suspended, not only the cost is high, but also many graphene powders can only extract a very small graphene layer each time , work efficiency and its low
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Embodiment 1
[0018] The novel preparation method of graphene, it comprises the following steps:
[0019] S1, mixing, put high-purity expanded graphite, anionic related surfactants, dispersants, defoamers and solvents in the reactor and mechanically stir for 50 minutes to form a mixed slurry;
[0020] S2, pulverizing, putting the above mixed slurry in an oven for drying at a drying temperature of 100° C., forming a solid after drying, and pulverizing the above solid to form pulverized particles with a particle size of less than 100 μm;
[0021] S3, laying, in the low-temperature device, adjust the temperature to 3°C, place the cetyl alcohol forming a plane vertically, and blow the crushed particles to the surface of the gold waxalcohol through the blower mechanism, and some crushed particles stick to the cetyl alcohol surface on, while other crushed particles fall;
[0022] S4, form, the cetyl alcohol that is stuck with pulverized particle is taken out from cryogenic device rapidly, and i...
Embodiment 2
[0024] S1, mixing, put high-purity expanded graphite, anionic related surfactants, dispersants, defoamers and solvents in the reactor and mechanically stir for 110min to form a mixed slurry;
[0025] S2, pulverization, put the above mixed slurry in an oven for drying, the drying temperature is 140°C, and form a solid after drying, and pulverize the above solid to form pulverized particles with a particle size of less than 100 μm;
[0026] S3, laying, in the low-temperature device, adjust the temperature to 8°C, place the cetyl alcohol forming a plane vertically, blow the crushed particles to the surface of the gold wax alcohol through the blower mechanism, and some of the crushed particles stick to the cetyl alcohol surface on, while other crushed particles fall;
[0027] S4, form, the cetyl alcohol that is stuck with pulverized particle is taken out from cryogenic device rapidly, and it is placed in the mixture of deionized water and ethanol, gradually heats the solution that...
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Abstract
The invention discloses a novel preparation method of graphene. The method includes the steps of: mechanically stirring high-purity expanded graphite, a related anionic-type surfactant, a dispersant,a defoamer, and a solvent, and drying and crushing the stirred slurry; blowing the crushed granules onto surface of cetyl alcohol by a blowing mechanism; placing the cetyl alcohol, on which the granules are adhered, in a mixture of deionized water and ethanol, and heating and volatilizing the cetyl alcohol; and filtering and quickly drying the product to obtain graphenepowder. The method not onlysaves production cost but also is high in production efficiency.
Description
technical field [0001] The invention relates to the technical field of lighting, in particular to a novel preparation method of graphene. Background technique [0002] The charging and discharging process of lithium-ion batteries is the process of reversible intercalation and deintercalation of Li+ between the positive and negative electrode materials. [0003] When charging, Li+ in the positive electrode material leaves the positive electrode, enters the electrolyte, migrates to the negative electrode through the diaphragm, captures electrons on the negative electrode and is reduced, and is stored in the layered structure material; when discharging, the lithium in the negative electrode will lose electrons and die Li+ is formed, enters the electrolyte, migrates through the separator to the positive electrode, and is stored in the positive electrode material. An ideal lithium-ion battery should have high specific capacity, high density, high energy density, good safety, goo...
Claims
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