Preparing method for graphene and carbon nano tube composite porous electrode material

A carbon nanotube composite, porous electrode technology, applied in metal material coating process, superimposed layer plating, coating and other directions, can solve problems such as increasing nucleation density, rough surface of foamed nickel skeleton, and increasing electrode internal resistance. , to achieve the effect of elimination selectivity, high specific surface area and high catalytic activity

Inactive Publication Date: 2016-01-20
WUZHOU HGP ADVANCED MATERIALS TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the surface of the nickel foam skeleton is very rough, there are many grain boundaries, protrusions, pits, wrinkles, and even cracks and surface oxidation.
The rough surface structure of the metal will have a negative impact on the quality of the graphene grown on it, and the stepped structure on the metal surface may deflect the crystal direction of the graphene, thereby forming defects such as grain boundaries; graphene tends to Nucleation occurs at defects and rough microstructures, increasing the nucleation density, resulting in small grain sizes of graphene grown on the surface of the nickel foam skeleton, uneven layers and difficult control, and thicker graphene often exists at the grain boundaries. Few-layer graphene forms a disordered stack, and these defects greatly reduce graphene's ability to conduct electricity
At the same time, the method is selective for the composition of porous metals, and the substrate can only use metals that can catalyze the growth of graphene.
The method adds polyethylene glycol as catalyst Ni(NO 3 ) 2 The binder will lead to an increase in the internal resistance of the electrode, a decrease in the active area of ​​the catalyst, and a decrease in activity, which will adversely affect the growth of carbon nanotubes

Method used

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  • Preparing method for graphene and carbon nano tube composite porous electrode material

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Effect test

Embodiment 1

[0028] Using nickel foam as the substrate, the selected nickel foam has an average pore diameter of 100 μm and a thickness of 0.3 mm. Cu is deposited on the surface of the substrate as the first transition metal layer using vacuum magnetron sputtering technology. The working parameters are: vacuum chamber background Vacuum≤5×10 -2Pa, the pressure in the vacuum chamber during sputtering coating is ≤1Pa, the target power density applied per decimeter of target width is 0.1 kW to 1 kW, and the average thickness of the first transition metal layer is 5 nm. Put it in a vacuum furnace chamber, evacuate until the background vacuum inside the furnace chamber is less than or equal to 2Pa, then raise the temperature to 900°C, and at the same time pass in a mixture of hydrogen and argon, keep it warm for 13 minutes, continue to heat up to 1040°C, and then pass in benzene The gas is reacted, and the reaction time is 0.5 minutes. After the reaction, stop feeding benzene gas, and cool to ro...

Embodiment 2

[0031] Using foamed aluminum as the substrate, the selected foamed aluminum has an average pore diameter of 400 μm and a thickness of 0.8 mm. Cu-Ni alloy is deposited on the surface of the substrate as the first transition metal layer using vacuum magnetron sputtering technology. The working parameters are: vacuum Cavity background vacuum ≤5×10 -2 Pa, the pressure in the vacuum chamber during sputtering coating is ≤1Pa, the target power density applied per decimeter of target width is 0.1 kW to 1 kW, the average thickness of the first transition metal layer is 300nm, and Cu-Ni alloy will be deposited on the surface Place the aluminum foam in the vacuum furnace chamber, evacuate until the background vacuum inside the furnace chamber is ≤ 2Pa, then raise the temperature to 800°C, and at the same time pass in the mixed gas of hydrogen and argon, keep it warm for 20 minutes, continue to heat up to 975°C, and then Feed ethylene gas to react, and the reaction time is 12 minutes. Aft...

Embodiment 3

[0034] Using nickel-iron foam as the substrate, the selected nickel-iron foam has an average pore diameter of 500 μm and a thickness of 1.5 mm. Co-Ni alloy is deposited on the surface of the substrate as the first transition metal layer using vacuum magnetron sputtering technology. The working parameters are: : Vacuum cavity background vacuum ≤5×10 -2 Pa, the pressure in the vacuum chamber during sputtering coating is ≤1Pa, the target power density applied per decimeter target width is 0.1 kW to 1 kW, the average thickness of the first transition metal layer is 400nm, and the Co-Ni alloy will be deposited on the surface The foamed nickel iron is placed in the vacuum furnace cavity, evacuated until the background vacuum inside the furnace cavity is ≤2Pa, and then heated up to 850°C, and at the same time, a mixed gas of hydrogen and argon is introduced, kept for 30 minutes, and continued to heat up to 1000°C. Then feed methane gas to react, the reaction time is 20 minutes, stop ...

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Abstract

The invention discloses a preparing method for a graphene and carbon nano tube composite porous electrode material. A layer of metal catalyst is deposited on the surface of a porous metal matrix to grow graphene, then a layer of metal catalyst is deposited on the surface of the graphene to grow a carbon nano tube, and the electrode material compounding the graphene, the carbon nano tube and porous metal is obtained. The electrode material has the beneficial effects of being low in weight, high in specific area and conductivity, good in stability and long in service life, good electrochemical performance is shown, and very good application value is achieved on the aspect of electrode application.

Description

technical field [0001] The invention relates to a preparation method of a porous electrode material, in particular to a preparation method of a graphene and carbon nanotube composite porous electrode material. Background technique [0002] With the popularization and application of renewable energy around the world, the rapid development of the electric vehicle industry and the construction of smart grids, energy storage technology has become a key link that restricts and promotes energy development. The current renewable energy technologies mainly include wind energy, solar energy, and hydroelectric power generation. However, due to their unpredictable and changeable characteristics, they have a great impact on the reliability of the power grid, so they have not been applied on a large scale. The development of energy storage technology can effectively solve this problem. The essence of energy storage is to store electrical energy and release it when needed, so that renewab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00
CPCC23C28/322C23C28/343
Inventor 韦雁途穆俊江吴天和
Owner WUZHOU HGP ADVANCED MATERIALS TECH CORP
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