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Graphene preparation method

A technology of graphene and graphite, which is applied in the field of graphene preparation, can solve the problems of graphene structure damage and low yield, and achieve the effect of simple operation and high yield

Inactive Publication Date: 2014-03-12
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the current preparation method, there is graphite oxide reduction method, but this method will cause the destruction of graphene structure; there is also the use of pyrolysis carbon source to prepare graphene, but the yield of this method is low

Method used

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preparation example Construction

[0025] Such as figure 1 Shown, the preparation method of the graphene of one embodiment, comprises the steps:

[0026] Step S11 0: preparation of the working electrode, pressing graphite on the stainless steel current collector as the working electrode of the three-electrode system.

[0027] Graphite and binder are placed on the current collector, and then pressed into a working electrode of the three-level system with a mold. The current collector is preferably a stainless steel current collector.

[0028] Graphite can be graphite commonly used in this field, preferably natural flake graphite or artificial graphite.

[0029] Preferably, the counter electrode of the three-electrode system is a lead plate, and the reference electrode is Hg / Hg 2 SO 4 .

[0030] Step S120: preparation of intercalated graphite, using a three-electrode system to prepare intercalated graphite.

[0031] Intercalated graphite was prepared using a three-electrode system. The preparation method i...

Embodiment 1

[0060] The preparation of the graphene of the present embodiment is as follows:

[0061] (1) Preparation of intercalated graphite: use stainless steel sheet as the current collector, place about 2g of natural flake graphite on the current collector, and press it with a mold to obtain the working electrode. The graphite is pressed into a size of 75×40×7mm 3 Graphite sheet, with lead plate as counter electrode, Hg / Hg 2 SO 4 As a reference electrode, formic acid as the electrolyte, put the three electrodes into the electrolytic cell, and completely soak in the electrolyte; at room temperature, the current density is 5mA / cm 2 React for 20 hours, filter, wash with deionized water, and dry at 60° C. for 24 hours in a vacuum oven to obtain intercalated graphite.

[0062] (2) Take 1g of intercalated graphite and add it to the EtMeImBF 4 In the ionic liquid container, place the container in a microwave oven with a power of 2000 watts and peel off for 1 minute to obtain a reaction so...

Embodiment 2

[0066] The preparation of the graphene of the present embodiment is as follows:

[0067] (1) Preparation of intercalated graphite: use stainless steel sheet as the current collector, place about 2g of artificial graphite on the current collector, and press it with a mold to obtain the working electrode. The graphite is pressed into a size of 75×40×7mm 3 Graphite sheet, with lead plate as counter electrode, Hg / Hg 2 SO 4 As a reference electrode, acetic acid as the electrolyte, put the three electrodes into the electrolytic cell, and completely soaked in the electrolyte; at room temperature, the current density is 20mA / cm 2 React for 10 hours, filter, wash with deionized water, and dry at 70° C. for 20 hours in a vacuum oven to obtain intercalated graphite.

[0068] (2) Take 1 g of intercalated graphite and add it to EtMeImN(CF 3 SO 2 ) 2 In the container of the ionic liquid, the container is placed in a microwave oven with a power of 1000 watts and peeled off for 10 minute...

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Abstract

The invention relates to a graphene preparation method, which comprises: 1, preparing a working electrode, wherein graphite is pressed on a stainless steel current collector so as to be adopted as a working electrode of a three-electrode system, 2, preparing intercalation graphite, wherein the three-electrode system is adopted to prepare intercalation graphite, 3, washing, wherein deionized water is adopted to wash the intercalation graphite, 4, carrying out vacuum drying, 5, carrying out microwave stripping, wherein the dried intercalation graphite is taken and added to an ion liquid according to a certain mass volume ratio, and the obtained mixture is placed into a microwave oven to carry out stripping, 6, washing, wherein filtration is performed by using organic solvent, and washing is performed by using deionized water until the pH value is neutral, and 7, carrying out vacuum drying. According to the present invention, the graphene preparation method has characteristics of simple operation and easy industrialization achievement, the yield of the graphene prepared by using the graphene preparation method is high, and the single layer rate of the graphene is up to more than 60%.

Description

technical field [0001] The invention relates to the field of material synthesis, in particular to a method for preparing graphene. Background technique [0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004, and won the Nobel Prize in Physics in 2010, which once again sparked an upsurge in carbon material research. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and can be used in electrode materials, composite materials, etc. Among the current preparation methods, there is graphite oxide reduction method, but this method will cause the destruction of graphene structure; there is also the use of pyrolysis carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 周明杰王要兵袁新生钟辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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