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Method for preparing graphene

A technology of graphene and intercalated graphite, which is applied in the field of new material synthesis, can solve the problems of low yield and achieve the effect of high yield, good electrical conductivity, and complete exfoliation

Inactive Publication Date: 2013-12-18
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods currently have some shortcomings, such as low yield

Method used

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  • Method for preparing graphene

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Embodiment 1

[0034] A method for preparing graphene, comprising the steps of:

[0035] (1) Stainless steel sheets are used as current collectors, natural phosphorus flake graphite is pressed into graphite sheets as working electrodes, and lead plates are used as counter electrodes, Hg / Hg 2 SO 4 As a reference electrode, use ferric chloride solution as the electrolyte, put the three electrodes into the electrolytic cell and completely soak in the electrolyte, at room temperature, at 5mA / cm 2 Under the current density, react for 24 hours to prepare ferric chloride intercalated graphite.

[0036] Get ferric chloride intercalated graphite, add deionized water, and be made into the ferric chloride intercalated graphite suspension that concentration is 5g / L under stirring.

[0037](2) Take 1.5L ferric chloride intercalated graphite suspension and add it to a high-speed centrifuge with a capacity of 2L and cover it. Add a constant magnetic field with a magnetic field strength of 1T on both side...

Embodiment 2

[0041] A method for preparing graphene, comprising the steps of:

[0042] (1) Stainless steel sheets are used as current collectors, natural phosphorus flake graphite is pressed into graphite sheets as working electrodes, and lead plates are used as counter electrodes, Hg / Hg 2 SO 4 As a reference electrode, use nickel chloride solution as the electrolyte, put the three electrodes into the electrolytic cell and completely soak in the electrolyte, at room temperature, at 20mA / cm 2 Under the current density, react for 10 hours to prepare nickel chloride intercalated graphite.

[0043] Get nickel chloride intercalation graphite, add deionized water, be made into the nickel chloride intercalation graphite suspension that concentration is 5g / L under stirring.

[0044] (2) Take 1.5L nickel chloride intercalated graphite suspension and add it to a high-speed centrifuge with a capacity of 2L and cover it. Add a constant magnetic field with a magnetic field strength of 0.1T on both si...

Embodiment 3

[0047] A method for preparing graphene, comprising the steps of:

[0048] (1) Stainless steel sheets are used as current collectors, natural phosphorus flake graphite is pressed into graphite sheets as working electrodes, and lead plates are used as counter electrodes, Hg / Hg 2 SO 4 As a reference electrode, use copper chloride solution as the electrolyte, put the three electrodes into the electrolytic cell and completely soak in the electrolyte, at room temperature, at 12mA / cm 2 Under a certain current density, react for 16 hours to prepare copper chloride intercalated graphite.

[0049] Get cupric chloride intercalation graphite, add deionized water, be made into the copper chloride intercalation graphite suspension that concentration is 8g / L under stirring.

[0050] (2) Take 1.5L copper chloride intercalated graphite suspension and add it to a high-speed centrifuge with a capacity of 2L and cover it. Add a constant magnetic field with a magnetic field strength of 0.01T on ...

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Abstract

The invention provides a method for preparing graphene. The method comprises the following steps: taking a chloride intercalated graphite, adding deionized water, and stirring to prepare a chloride intercalated graphite suspension with the concentration of 5-10 g / L; placing the chloride intercalated graphite suspension in a magnetic field for centrifuging with the magnetic field intensity of 0.01-1 Tesla and the centrifugal revolving speed of 1000-5000 rpm, making the intercalated graphite strip, after stopping centrifugation, taking an upper-layer solution, pouring the upper-layer solution into a filter funnel to filter, taking the filter residue, and drying to obtain graphene. The preparation method of the invention utilizes the magnetic field to auxiliary high-speed centrifugal stripping of the intercalated graphite to prepare graphene, has the advantages of complete stripping and high yield, allows graphene to have less number of layers and be uniform, and allows the prepared graphene to have good electrical conductivity.

Description

technical field [0001] The invention relates to the field of new material synthesis, in particular to a method for preparing graphene. Background technique [0002] After its discovery in 1841, intercalated graphite has been extensively and in-depth researched on its properties and applications. Because it maintains the good properties of graphite and has some unique properties, it can be used in conductors, superconductors, batteries and other fields. [0003] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004. It is a single-layer or multi-layer extremely thin carbon material. 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. Single-layer graphene has excellent electrical and thermal conductivity and low thermal ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184C01B32/186
Inventor 周明杰袁新生王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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