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Method for preparing graphene through electric arc discharge

An arc discharge and graphene technology, which is applied in the field of graphene preparation by arc discharge method, can solve the problems of difficulty in realizing large-scale preparation of graphene, lack of carbon atoms, poor electrical conductivity, etc., and achieves good flexibility and good crystallinity. , the effect of high yield

Inactive Publication Date: 2018-03-13
李世珍
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Problems solved by technology

Among them, although the graphene prepared by the micromechanical exfoliation method and the chemical vapor deposition method is of high quality, the yield is low, and it is difficult to realize the large-scale preparation of graphene. Although the chemical exfoliation method can prepare graphene in large quantities, oxidation, ultrasonic and subsequent Reduction often causes the loss of carbon atoms, making graphene contain more defects and poor conductivity

Method used

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Examples

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Embodiment Construction

[0018] A method for preparing graphene by arc discharge method, comprising the steps of:

[0019] (1) Preparation of graphene:

[0020] In a water-cooled stainless steel vacuum chamber, graphene was prepared by DC arc discharge method; the pressure was 53200 Pa, the volume ratio of hydrogen gas and nitrogen gas mixture was 1:1, and two high-purity graphite rods with a diameter of 10 mm were used as discharge electrodes; during the whole synthesis process , the electrode spacing is always controlled at about 2 mm by a stepping motor, the discharge current is 120 A, and the discharge process lasts for about 30 minutes;

[0021] (2) Preparation of graphene conductive ink:

[0022] The mixture of graphene and ethyl cellulose prepared by the above DC arc method was added to the mixed solution of terpineol and ethanol; then stirred with a magnetic stirrer for 30 min to obtain a black suspension; finally dispersed with an ultrasonic cleaner for 24 h, Obtain graphene conductive ink;...

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Abstract

The invention relates to the technical field of inorganic materials, in particular to a method for preparing graphene by an arc discharge method. A method for preparing graphene by an arc discharge method, comprising the following steps: (1) preparation of graphene; (2) preparation of graphene conductive ink. The graphene prepared by the arc discharge method in the invention has the advantages of high yield, high purity, good crystallinity and the like. Graphene is used as a conductive filler to synthesize graphene conductive ink. The prepared conductive ink has good dispersion, no obvious layering, high temperature resistance, and excellent electrical conductivity. It has good flexibility and can be applied to flexible and foldable electronic devices, which greatly broadens its application field.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a method for preparing graphene by an arc discharge method. Background technique [0002] Conductive ink is a conductive composite material composed of conductive fillers, linking agents, solvents and additives. It belongs to functional special inks. It is usually printed on conductive substrates and has the functions of conducting current and eliminating the accumulation of static charges. According to the types of conductive fillers, conductive inks can be roughly divided into noble metal filled conductive inks, non-precious metal filled conductive inks and inorganic carbon filled conductive inks. Precious metal-based (gold, silver) conductive inks, non-precious metal-based (copper) conductive inks, and carbon-based conductive inks have all been successfully applied to crystal and thin-film solar photovoltaic panels, RFID, logic and memory circuits, touch screen dis...

Claims

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Application Information

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IPC IPC(8): C01B32/184C09D11/52
CPCC09D11/52
Inventor 李世珍
Owner 李世珍
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