Method for electrochemically preparing graphene

A graphene and electrochemical technology, applied in the field of electrochemical preparation of graphene, to achieve the effects of high production efficiency, good economy, and low energy consumption

Inactive Publication Date: 2016-09-21
DEYANG CARBONENE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, and to provide a method for electrochemically preparing graphene. , strong acid, strong oxidant and expensive organic liquid; at the same time, the preparation process is simple, low energy consumption and low cost

Method used

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  • Method for electrochemically preparing graphene
  • Method for electrochemically preparing graphene

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Effect test

Embodiment 1

[0043] A method for electrochemically preparing graphene, comprising the steps of:

[0044] (1) Use graphite paper as the positive electrode, graphite plate as the negative electrode, and the aqueous solution of the intercalation agent as the electrolyte, and use an electrochemical method to intercalate the graphite paper under the condition of a current density of 0.1mA / g; intercalation After layering is completed, take out the intercalated graphite paper, also in the electrolyte, under the condition of a voltage of 2V, immerse the intercalated graphite paper in the electrolyte at a speed of 1mm / min to expand, after the expansion is completed The porous and worm-like expanded graphite particles suspended in the electrolyte are obtained. Among them, the intercalation process and the expansion process are carried out in the same electrolyte, which greatly simplifies the preparation process.

[0045] The intercalation agent in this step includes a main intercalation agent, and ...

Embodiment 2

[0050] A method for electrochemically preparing graphene, comprising the steps of:

[0051] (1) Use graphite paper as the positive electrode, graphite plate as the negative electrode, and the aqueous solution of the intercalation agent as the electrolyte, and use electrochemical methods to intercalate the graphite paper under the condition of a current density of 30mA / g, and the intercalation is completed Finally, take out the intercalated graphite paper, also in the electrolyte, under the condition of a voltage of 20V, immerse the intercalated graphite paper in the electrolyte at a speed of 5mm / min to expand, and obtain a suspension after the expansion is completed. In the electrolyte, the surface is loose, porous, and worm-like expanded graphite particles. Among them, the intercalation process and the expansion process are carried out in the same electrolyte, which greatly simplifies the preparation process.

[0052] The intercalation agent in this step includes a main inte...

Embodiment 3

[0056] A method for electrochemically preparing graphene, comprising the steps of:

[0057] (1) Use graphite paper as the positive electrode, graphite plate as the negative electrode, and the aqueous solution of the intercalation agent as the electrolyte, and use an electrochemical method to intercalate the graphite paper under the condition of a voltage of 0.5V. After the intercalation is completed , take out the intercalated graphite paper, also in the electrolyte, under the condition of a voltage of 3V, immerse the intercalated graphite paper in the electrolyte at a speed of 20mm / min to expand, after the expansion is completed, the suspension in In the electrolyte, the surface is loose, porous, and worm-like expanded graphite particles. Among them, the intercalation process and the expansion process are carried out in the same electrolyte, which greatly simplifies the preparation process.

[0058] The intercalation agent in this step includes a main intercalation agent, th...

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Abstract

The invention discloses a method for electrochemically preparing graphene. The method comprises the following steps: 1, intercalating and expanding graphite paper by adopting graphite paper as a positive electrode and an aqueous intercalator solution as an electrolyte to obtain expanded graphite; 2, filtering and washing the expanded graphite, and carrying out ultrasonic peeling treatment on the expanded graphite to obtain a flocculent graphene slurry; and 3, filtering the graphene slurry, and drying the graphene slurry through adopting a microwave vacuum drier to obtain fluffy graphene powder. The electrochemical method solves the problem of use of heavy metal-containing reagents, strong acids, strong oxidants and expensive organic liquids in the graphene preparation process in the prior art, and has the advantages of simple preparation technology, low energy consumption and low cost.

Description

technical field [0001] The invention relates to graphene preparation technology, in particular to a method for electrochemically preparing graphene. Background technique [0002] Since its discovery in 2004, graphene has attracted much attention as a new type of carbon material. It is a completely sp 2 The quasi-two-dimensional crystal material composed of hybrid carbon atoms with a thickness of only one atomic layer or several single atomic layers has excellent properties such as high light transmission and electrical conductivity, high specific surface area, high strength and flexibility, etc. It is expected to be widely used in the fields of high-performance nanoelectronic devices, optoelectronic devices, gas sensors, composite materials, field emission materials and energy storage. However, the low-cost and large-scale preparation of high-quality graphene still faces difficulties, which restricts the development and application of this material. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B2204/30C01P2002/82C01P2004/03C01P2004/04
Inventor 黄全国高华姚林简璐
Owner DEYANG CARBONENE TECH
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