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Graphene foam with three dimensional fully connected network and macroscopic quantity preparation method thereof

A fully connected network and graphene foam technology, which is applied in the field of graphene-based new materials and its chemical vapor deposition preparation, can solve the problem of low graphene production, achieve high specific surface area, high porosity, excellent charge conduction and heat conduction effect of ability

Active Publication Date: 2012-09-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a graphene foam with a three-dimensional fully connected network and its macro-preparation method, give full play to the excellent performance of graphene and expand the application of graphene, and solve the problem of low graphene output in the prior art , and can only obtain two-dimensional planar graphene films and other problems, it has the characteristics of simple operation, low cost, high yield and easy structure regulation

Method used

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  • Graphene foam with three dimensional fully connected network and macroscopic quantity preparation method thereof
  • Graphene foam with three dimensional fully connected network and macroscopic quantity preparation method thereof
  • Graphene foam with three dimensional fully connected network and macroscopic quantity preparation method thereof

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Embodiment 1

[0032] First, if figure 1 As shown, the present invention adopts the horizontal reaction furnace to grow graphene, the two ends of the horizontal reaction furnace are respectively provided with a gas inlet 1 and a gas outlet 4, the foamed nickel 2 is placed in the high temperature zone of the horizontal reaction furnace, and the thermocouple 3 is located in the horizontal reaction furnace. Furnace high temperature zone to monitor the reaction temperature in real time. Nickel foam (70 mm × 300 mm × 1.2 mm, the pore size distribution is about 110PPI, the surface density is about 300g / m 2) placed in the central area of ​​a horizontal reaction furnace (the diameter of the furnace tube is 75mm, and the length of the reaction zone is 300mm) (the reaction zone, where there are thermocouples to monitor the furnace temperature in real time); heated to 1000°C in an atmosphere of hydrogen and argon (Hydrogen and argon flow rates are 200 and 500 ml / min respectively during the heating pro...

Embodiment 2

[0036] First, if figure 1 As shown, the present invention adopts the horizontal reaction furnace to grow graphene, the two ends of the horizontal reaction furnace are respectively provided with a gas inlet 1 and a gas outlet 4, the foamed nickel 2 is placed in the high temperature zone of the horizontal reaction furnace, and the thermocouple 3 is located in the horizontal reaction furnace. Furnace high temperature zone to monitor the reaction temperature in real time. Nickel foam (70 mm × 300 mm × 1.2 mm, the pore size distribution is about 110PPI, the surface density is about 300g / m 2 ) placed in the central area of ​​a horizontal reaction furnace (the diameter of the furnace tube is 75mm, and the length of the reaction zone is 300mm) (the reaction zone, where there are thermocouples to monitor the furnace temperature in real time); heated to 1000°C in an atmosphere of hydrogen and argon (Hydrogen and argon flow rates are 200 and 500 ml / min respectively during the heating pr...

Embodiment 3

[0040] First, if figure 1 As shown, the present invention adopts the horizontal reaction furnace to grow graphene, the two ends of the horizontal reaction furnace are respectively provided with a gas inlet 1 and a gas outlet 4, the foamed nickel 2 is placed in the high temperature zone of the horizontal reaction furnace, and the thermocouple 3 is located in the horizontal reaction furnace. Furnace high temperature zone to monitor the reaction temperature in real time. Nickel foam (70 mm × 300 mm × 1.2 mm, the pore size distribution is about 110PPI, the surface density is about 300g / m 2 ) placed in the central area of ​​a horizontal reaction furnace (the diameter of the furnace tube is 75mm, and the length of the reaction zone is 300mm) (the reaction zone, where there are thermocouples to monitor the furnace temperature in real time); heated to 900°C in an atmosphere of hydrogen and argon (The flow rate of hydrogen and argon during the heating process is 200 and 500 ml / min res...

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Abstract

The invention relates to a graphene-based novel material and a chemical vapor deposition preparation technology thereof, in particular to graphene foam with a three dimensional fully connected network and a macroscopic quantity preparation method thereof. The method is suitable for a mass preparation of the graphene foam with high qualities. Three dimensional connected graphene can grow by catalytic cracking of carbon source gases on the surface of a three dimensional porous metal through the chemical vapor deposition technology, and a porous foam-shaped graphene three dimensional macroscopic body can be obtained after a porous metal base is removed by dissolving subsequently. According to the graphene foam with the three dimensional fully connected network and the macroscopic quantity preparation method thereof, a simple template replication method is used for preparing the three dimensional connected graphene macroscopic body, and the method has the advantages that the operation is simple and convenient, the rate of production is high, and the adjustment and control of the structure are easy. The graphene foam forms the fully connected network in a seamless connection mode, has a low density, a high porosity and specific surface area and excellent capabilities of charge conduction and heat conduction and establishes a foundation for applications of graphene in fields of electric conduction, thermally conductive composite materials, electromagnetic shielding, wave absorbing, catalysis, sensing and energy storage materials and the like.

Description

Technical field: [0001] The present invention relates to a graphene-based new material and its chemical vapor deposition (CVD) preparation technology, specifically a graphene foam with a three-dimensional fully connected network and its macro-preparation method, which is suitable for mass production of high-quality graphene macro-body . Background technique: [0002] Graphene is a two-dimensional honeycomb crystal structure formed by densely packing a single layer of carbon atoms, and is the basic structural unit for constructing other dimensional carbon materials (zero-dimensional fullerene, one-dimensional carbon nanotubes, and three-dimensional graphite). The unique crystal structure of graphene makes it have excellent electrical, thermal and mechanical properties, such as its electron mobility as high as 200,000 cm at room temperature 2 / V s, the thermal conductivity is as high as 5300W / m k, and it is expected to be obtained in the fields of multifunctional nanoelectron...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/186
Inventor 任文才成会明陈宗平
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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