Method for preparing graphene membrane electrode with overlarge area and high quality

A graphene film, super-large area technology, applied in gaseous chemical plating, coating, metal material coating process, etc., can solve the problem of difficulty in forming a single-layer high-quality graphene film, a small graphene film area, and a graphene film. Poor quality and other problems, to achieve the effect of widening the field of use, easy control and low cost

Inactive Publication Date: 2010-06-30

UNIV OF ELECTRONIC SCI & TECH OF CHINA

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AI-Extracted Technical Summary

Problems solved by technology

The catalyst grains on the substrate obtained by the latter method are small and poor in quality, and the graphene film formed on it is of poor quality, and mainly forms multilayer graphene films, and it is difficult to form a singl...

Abstract

The invention provides a method for preparing a graphene membrane electrode with overlarge area and high quality, which comprises the following steps of: placing a spiral or S-shaped quartz tank provided with a metal foil into a reactor by adopting a chemical vaporous deposition method, introducing a hydrocarbon for catalytic decomposition to obtain a graphene membrane on the metal foil; attaching an organic colloid on the product to obtain an organic colloid/grapheme/metal foil combination; removing the metal foil by using metal foil corrosive liquid to obtain an organic colloid/grapheme combination; taking out the product in the previous step by using a substrate, placing the product into deionized water, washing and drying to obtain an organic colloid/grapheme/ substrate combination; finally, removing the organic colloid by using an organic solvent, taking out and naturally drying to obtain the graphene membrane electrode with overlarge area and high quality, which is positioned on the substrate. The method has simple operation step, large area of the obtained product, low raw material cost, high electrical conductivity and high light transmittance, and is mainly used for the fields of semiconductors, solar batteries, liquid crystal panel display, and the like.

Application Domain

Chemical vapor deposition coating

Technology Topic

Cvd grapheneIon +17

Image

Examples

Experimental program(4)

Example Embodiment

[0014] Example 1: The preparation method of the super large area and high quality graphene film electrode of the present invention has the following steps:

[0015] 1) Place a spiral quartz cell with copper foil (thickness of 20 microns and size of 20×10cm) in the reactor, pass hydrogen 100Pa, heat to 1000℃, keep for 20 minutes, then pass methane The gas is 10Pa, after 20 minutes of heat preservation, the temperature is reduced to asphyxia temperature at a rate of 10°C/min, the hydrogen and methane gas are turned off, and a graphene film is obtained on the copper foil. .

[0016] 2) Spray photoresist on the graphene film and bake it at 180°C for 5 minutes to obtain a photoresist/graphene/copper foil combination.

[0017] 3) The product obtained in step 2) is immersed in a 10% (mass) ferric nitrate solution, and the copper foil is removed to obtain a photoresist/graphene combination.

[0018] 4) Remove the product of step 3) from the ferric nitrate solution with a glass slide, put it into deionized water, wash twice, place it on the substrate, and bake it at 100°C for 5 minutes to obtain photoresist/graphene/glass 片合体。 Piece combination.

[0019] 5) Put the product obtained in step 4) into the acetone liquid, remove the photoresist, take it out, and dry naturally to obtain an ultra-large-area high-quality graphene film electrode attached to a glass sheet.

Example Embodiment

[0020] Embodiment 2: The preparation method of the super large area and high quality graphene film electrode of the present invention has the following steps:

[0021] 1) Place a spiral quartz cell with nickel foil (thickness of 25 microns and size of 20×20cm) in the reactor, and pass hydrogen to 1000 Pa, heat to 800°C for 60 minutes, and then pass in methane , Ethane mixed gas 10000Pa, keep for 1 minute and then cool to room temperature at a rate of 100℃/min, turn off the mixed gas of hydrogen, methane, and ethane to obtain graphene film on nickel foil.

[0022] 2) Spin-coating PMMA on the graphene film, and bake at 100°C for 10 minutes to obtain a PMMA colloid/graphene/nickel foil combination.

[0023] 3) The product obtained in step 2) is immersed in a 40% (mass) ferric nitrate solution, and the nickel foil is removed to obtain a PMMA colloid/graphene combination.

[0024] 4) Use a plastic sheet to take the product of step 3) out of the ferric nitrate solution, put it in deionized water, wash it twice, place it on the substrate, and bake it at 180°C for 5 minutes to obtain PMMA colloid/graphene/plastic sheet hybrid.

[0025] 5) Put the product obtained in step 4) into a mixed liquid of acetone and ethanol, remove the PMMA, take it out, and dry naturally to obtain a super large-area high-quality graphene film electrode attached to a plastic sheet.

Example Embodiment

[0026] Embodiment 3: The preparation method of the super large area and high quality graphene film electrode of the present invention has the following steps:

[0027] 1) Put the S-shaped quartz tank with cobalt foil (thickness 20 microns, size 20×20cm) in the reactor, and pass hydrogen 1Pa, heat to 700℃, keep for 0 minutes, and then pass ethanol The gas is 0.1Pa, and the temperature is reduced to room temperature at a rate of 5°C/min after holding for another 1 minute. The hydrogen and ethanol gases are turned off to obtain a graphene film on the cobalt foil.

[0028] 2) Spin-coating polyimide on the graphene film and bake at 80°C for 20 minutes to obtain a polyimide colloid/graphene/cobalt foil combination.

[0029] 3) The product obtained in step 2) is immersed in a 25% (mass) hydrochloric acid solution, and the cobalt foil is removed to obtain a polyimide colloid/graphene combination.

[0030] 4) Take out the product of step 3) from the hydrochloric acid solution with a paper sheet, put it in deionized water, clean it twice, place it on the substrate, and bake it at 80°C for 10 minutes to obtain polyimide colloid/graphene /Printing paper combination.

[0031] 5) Put the product obtained in step 4) into acetone vapor, remove the polyimide, take it out, and dry naturally to obtain a super large area high-quality graphene film electrode attached to a printing paper sheet.

PUM

Property	Measurement	Unit
Thickness	25.0	µm
Thickness	20.0	µm
Thickness	30.0	µm

Description & Claims & Application Information

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