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Method for preparing nano-graphite with electric arc method

A technology of nano-graphene and arc method, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of poor charge and discharge performance, and achieve excellent rate charge and discharge performance and migration path The effect of short and high rate charge and discharge performance

Inactive Publication Date: 2015-05-13
北京清大际光科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a method for preparing nano-graphene by an electric arc method, which solves the problem of poor charging and discharging performance when the existing graphene is used as the negative electrode material of lithium-ion batteries

Method used

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Experimental program
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Effect test

Embodiment 1

[0023] A method for preparing nano-graphene by an electric arc method is to use graphite rods as the cathode and anode poles of the nano-graphene prepared by the arc method, and perform arc discharge under high current and helium atmosphere. During the arc discharge process, the anode graphite rod is continuously consumed, High-purity 1-2 layers of nanometer graphene can be obtained in the inner wall area of ​​the reaction chamber.

[0024] Among them, the graphite rod is a square spectrum pure ink electrode, and the size of the square spectrum pure ink electrode is 35mm*35mm*420mm. The two square spectrum pure ink electrodes are placed facing each other with a distance of 2mm.

[0025] Among them, the discharge current during arc discharge is 2200A, the arc temperature is 2500°C, and the pressure of the helium atmosphere is -6.5*10 -2 MPa.

[0026] Wherein, it also includes the step of burning the obtained graphene in the air to remove a small amount of amorphous carbon in ...

Embodiment 2

[0028] A method for preparing nano-graphene by an electric arc method is to use graphite rods as the cathode and anode poles of the nano-graphene prepared by the arc method, and perform arc discharge under high current and helium atmosphere. During the arc discharge process, the anode graphite rod is continuously consumed, High-purity 1-2 layers of nanometer graphene can be obtained in the inner wall area of ​​the reaction chamber.

[0029] Among them, the graphite rod is a square spectrum pure ink electrode, and the size of the square spectrum pure ink electrode is 35mm*35mm*420mm. The two square spectrum pure ink electrodes are placed facing each other with a distance of 1 mm.

[0030] Among them, the discharge current during arc discharge is 1500A, the arc temperature is 3000°C, and the pressure of the helium atmosphere is -5*10 -2 MPa.

[0031] Wherein, it also includes the step of burning the obtained graphene in the air to remove a small amount of amorphous carbon in t...

Embodiment 3

[0033] A method for preparing nano-graphene by an electric arc method is to use graphite rods as the cathode and anode poles of the nano-graphene prepared by the arc method, and perform arc discharge under high current and helium atmosphere. During the arc discharge process, the anode graphite rod is continuously consumed, High-purity 1-2 layers of nanometer graphene can be obtained in the inner wall area of ​​the reaction chamber.

[0034] Among them, the graphite rod is a square spectrum pure ink electrode, and the size of the square spectrum pure ink electrode is 35mm*35mm*420mm. The two square spectrum pure ink electrodes are placed opposite each other with a distance of 3mm.

[0035] Among them, the discharge current during arc discharge is 3000A, the arc temperature is 2800°C, and the pressure of the helium atmosphere is -10*10 -2 MPa.

[0036] Wherein, it also includes the step of burning the obtained graphene in the air to remove a small amount of amorphous carbon in...

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Abstract

The invention provides a method for preparing nano-graphite with an electric arc method. Graphite rods are taken as two poles of an electric arc furnace, electric arc discharge is performed under the high-current and helium atmosphere, a graphite rod of the positive pole is continuously consumed in the electric arc discharge process, and graphite can be obtained in an inner wall area of a reaction chamber. The graphite prepared with the method has a smaller size, the migration path of lithium ions is short when the graphite is used as a lithium ion battery anode material, and accordingly, the graphite has excellent high-rate charge-discharge performance.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterial preparation technology, in particular to a method for preparing nano graphene by an arc method. Background technique [0002] Nanographene is a recently discovered carbon nanomaterial with a two-dimensional planar structure. Its special single atomic layer structure makes it have many unique physical and chemical properties. The basic and applied research on graphene has become the current frontier and One of the hot topics. [0003] Carbon material is a common and special material on the earth. It can form diamond with higher hardness and soft graphite. In the past 20 years, carbon nanomaterials have been the frontier of scientific and technological innovation. In 1985, the rich Both Leene and the carbon nanotubes discovered in 1991 caused great repercussions, and a research boom arose. In 2004, Geim's group at the University of Manchester first obtained a single-layer or thin-layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00
Inventor 孙清友
Owner 北京清大际光科技发展有限公司
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