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A Novel Graphene/Carbon Tube/Graphene Composite Material, Its Preparation Method and Application

A composite material, graphene technology, applied in graphene, heat exchange materials, chemical instruments and methods, etc., can solve the problems of low energy density, inability to accommodate active substances, small internal volume of carbon nanotubes, etc. The effect of discharge performance, simple preparation method and wide source of raw materials

Active Publication Date: 2018-02-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The common problem of electrochemical energy storage batteries such as supercapacitors and lithium-ion batteries is that high energy density and high power density cannot be achieved at the same time. Demand for Energy Density Batteries
The internal volume of these carbon nanotubes is too small to accommodate other more active substances, thus limiting their application range in the field of new energy

Method used

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  • A Novel Graphene/Carbon Tube/Graphene Composite Material, Its Preparation Method and Application
  • A Novel Graphene/Carbon Tube/Graphene Composite Material, Its Preparation Method and Application
  • A Novel Graphene/Carbon Tube/Graphene Composite Material, Its Preparation Method and Application

Examples

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preparation example Construction

[0048] The preparation method of the graphene / carbon tube composite structure of described synthesis comprises:

[0049] A. Repeatedly cleaning, removing impurities, and drying natural biomass in alcohol, for example, adding cotton or poplar catkins or catkins preferred by natural biomass to ethanol solution to fully clean, remove impurities, and dry;

[0050] B Natural biomass is carbonized at high temperature with / without catalyst and with / without carbon-containing carrier gas to form hollow tubular carbon tubes with rich pore structure in the tube wall;

[0051] C uses the chemical vapor deposition method on the hollow tubular carbon tube to directly grow graphene sheets on the carbon tube to obtain a hollow graphene / carbon tube / graphene composite material.

[0052] The natural biomass material is preferably plant seed fiber, including natural fibrous biomass materials such as cotton, poplar catkins, catkins and the like.

[0053] Graphene / carbon tube / graphene composites a...

Embodiment 1

[0081] Use natural biomass cotton as raw material. First wash repeatedly in alcohol and water, remove impurities and dry. Then put the cotton into the middle of the tube furnace on the quartz boat, feed 100sccm of hydrogen and 300sccm of argon, heat to 1200°C at a heating rate of 10°C / min, and hold the temperature for 10 minutes. Afterwards, methane gas was fed, the air flow was respectively 10 sccm, and the reaction time was 180 minutes. After the reaction, turn off the methane gas, keep the flow of hydrogen and argon constant, and cool to room temperature naturally. Obtain hollow graphene / carbon tube / graphene composites, such as Figure 1-3 As shown, the inner diameter of the carbon tube is 3.3 μm, and the outer diameter is 5.2 μm. Incorporation of graphene / carbon tubes into ZnCl with a mass fraction of 5% 2 , activated in argon / hydrogen (300:100sccm) mixed gas, the activation temperature is 800°C. Then, graphene / carbon tubes obtained after activation were subjected to ...

Embodiment 2

[0083] As described in Example 1, when reacting at 1200° C., the flow rate of feeding methane was 5 sccm. The reaction time was 60 minutes.

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Abstract

The invention relates to a novel graphene / carbon tube / graphene composite material, a preparation method therefor, and an application. The material comprises a carbon tube and graphene deposited on the inner and outer surfaces of the carbon tube. The bonding of the graphene with the carbon tube is chemical bond connection. The internal diameter of the carbon tube is 50 nm - 100 microns, and the external diameter of the carbon tube is 55 nm - 200 microns. The number of graphene layers is 1-20.

Description

technical field [0001] The invention belongs to the field of graphene / carbon tube / graphene composite materials, in particular to a low-cost graphene / carbon tube / graphene composite material, a preparation method and its application in phase change energy storage and electrochemical energy storage batteries application. Background technique [0002] Graphene is a single-layer two-dimensional carbon atomic layer with a thickness of only one carbon atom of 0.35nm. The π bond existing above the graphene crystal plane runs through the entire atomic crystal plane, which is the same as the condensed ring aromatic hydrocarbon structure, which determines that graphene has excellent electrical properties. A graphene lattice is divided into three σ bonds, the carbon-carbon bond length is 0.142nm, and the strong connection between carbon atoms forms a stable regular hexagon. The stable connection makes the structure of graphene very stable. Graphene has excellent electrical properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/68H01M4/66C09K5/06C01B32/186
CPCY02E60/10Y02E60/13
Inventor 黄富强毕辉黄海宁许峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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