Porous graphene, graphene/porous metal composite material, and preparation methods of porous graphene and composite material

A technology of porous graphene and porous metal, applied in metal material coating process, coating, gaseous chemical plating, etc., can solve the problems of unadjustable pore size, complicated preparation process, low porosity, etc.

Active Publication Date: 2013-07-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of three-dimensional porous graphene and its composite materials is limited by the porous substrate, the pore size cannot be adjusted, the preparation process is complicated, and the porosity is low.

Method used

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  • Porous graphene, graphene/porous metal composite material, and preparation methods of porous graphene and composite material
  • Porous graphene, graphene/porous metal composite material, and preparation methods of porous graphene and composite material
  • Porous graphene, graphene/porous metal composite material, and preparation methods of porous graphene and composite material

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preparation example Construction

[0038] In the present invention, the preparation method of the graphene / porous metal composite material is to obtain the composite material by depositing graphene on a porous metal substrate. Described method specifically comprises:

[0039] (1) Metal powder lr, Pt, Mo, W, Zn, Nb, Ta, Ru, Ti, Zr, Pd, Fe, Co, Ni, Cu, V, Rh and / or its metal oxides and other materials The powder is used as the substrate, and the porous substrate is obtained by mechanical pressing, doctor blade coating, spin coating and other methods. This scheme preferably scrape coating method. Preferably, a proper amount of binder is added to the powder and ground to form a uniform slurry. The prepared slurry is scraped on the insulating substrate to form a film by scraping, and placed in a vacuum drying oven at a certain temperature for an appropriate time.

[0040] (2) Put the dried sample into the chemical vapor deposition reaction chamber, seal and check the airtightness of the high-temperature reaction ...

Embodiment 1

[0054] Commercially available high-purity metal powders Co and CoO powder materials were mixed at a mass ratio of 1:1, 2:1, 3:1, 4:1, and 5:1 and ball milled for 0.5 hours to obtain a uniformly mixed powder. A binder with a mass fraction of 45% was added and ground into a uniform slurry. The prepared slurry was scraped on a quartz substrate to form a film by scraping, and placed in a vacuum drying oven at 70° C. for 2 hours.

[0055] Put the dried sample into the chemical vapor deposition reaction chamber, seal and check the airtightness of the high-temperature reaction chamber, discharge the residual gas in the high-temperature reaction chamber under a protective atmosphere, and then carry out temperature programming at a rate of 0.5-20°C / minute. Heat to the reaction temperature of 500°C, 600°C, 700°C, keep the temperature for 10 minutes, adjust the flow rate of hydrogen and inert gas, the gas flow rate is 50sccm, 70sccm, 90sccm and 150sccm, 200sccm, 250sccm, the reaction t...

Embodiment 2

[0058] Mix the metal powder Cu and CuO powder materials at a mass ratio of 1:1, 2:1, 3:1, 4:1, 5:1 and ball mill for 0.5 hours to obtain a uniformly mixed powder. By adding a mass fraction of 45 % binder, made into a uniform slurry by grinding. The prepared slurry was scraped on a quartz substrate to form a film by scraping, and placed in a vacuum drying oven at 70° C. for 2 hours.

[0059] Put the dried sample into the chemical vapor deposition reaction chamber, seal and check the airtightness of the high-temperature reaction chamber, discharge the residual gas in the high-temperature reaction chamber under a protective atmosphere, and then carry out temperature programming at a rate of 0.5-20°C / minute. Heat to the reaction temperature of 500°C, 600°C, 700°C, keep the temperature for 10 minutes, adjust the flow rate of hydrogen and inert gas, the gas flow rate is 50sccm, 70sccm, 90sccm and 150sccm, 200sccm, 250sccm, the reaction time is 50 minutes, 60 minutes, 70 minute. ...

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Abstract

The invention relates to a novel porous graphene or a graphene/porous metal composite material, and preparation methods of the porous graphene and the composite material. The preparation method of the composite material comprises the following steps: blending metal powder and/or metal oxide powder, blade-coating to form a film, and carrying out high temperature reduction in a reducing atmosphere to form a three-dimensional porous metal substrate; and growing graphene through adopting a chemical vapor deposition process to obtain the graphene/porous metal composite material. The material is a graphene composite material and has a wide application prospect. The preparation of the porous graphene or the graphene/porous metal composite material has an original creativity and is of positive scientific significance.

Description

technical field [0001] The invention belongs to the technical field of graphene composite materials, and in particular relates to porous graphene, graphene / porous metal composite materials and their preparation methods. [0002] In the present invention, a three-dimensional porous metal film is prepared by a novel method, and it is used as a substrate, and a high-quality graphene / porous metal composite material with adjustable layers is obtained by vapor deposition. The invention also relates to a porous metal film prepared from multi-element metal substrates with different amounts of dissolved carbon. The graphene / porous metal composite material with adjustable layers is obtained by using the principle of kinetics and selecting a suitable reaction temperature and time. technical background [0003] Since graphene was successfully isolated, it has aroused widespread interest in the scientific community because of its excellent physical properties. As the most conductive mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C23C16/26
Inventor 黄富强周密毕辉
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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