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A kind of preparation method of metal-graphene composite porous electrode material

A graphene composite and porous electrode technology, which is applied in hybrid capacitor electrodes, nanotechnology for materials and surface science, battery electrodes, etc., can solve the problems of increasing nucleation density, difficulty in controlling, and uneven number of layers, etc. The effect of large electrode surface area, improved coverage, and improved conductivity

Active Publication Date: 2019-05-28
WUZHOU HGP ADVANCED MATERIALS TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very rough surface of the metal foam skeleton, there are many grain boundaries, protrusions, pits, wrinkles, and even cracks and surface oxidation, the rough surface structure of the metal will have some impact on the quality of the graphene grown on it. Adverse effects, the step-like structure on the metal surface may deflect the crystal orientation of graphene, thereby forming defects such as grain boundaries, graphene tends to nucleate at defects and rough microstructures, increasing the nucleation density, resulting in foam The graphene grain size grown on the surface of the nickel skeleton is small, the number of layers is uneven, and it is difficult to control. There are often thicker graphene at the grain boundary, and few layers of graphene form disordered stacks. These defects greatly reduce the conductivity of graphene. ability
This method is selective for the composition of porous metals, and the substrate can only use metals that can catalyze the growth of graphene.

Method used

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  • A kind of preparation method of metal-graphene composite porous electrode material

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Experimental program
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Effect test

Embodiment 1

[0025] 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 a transition metal layer using vacuum magnetron sputtering technology. The working parameters are: vacuum chamber 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, and the average thickness of the transition metal layer is 5 nm; the nickel foam deposited on the surface of Cu is placed In the vacuum furnace chamber, evacuate until the background vacuum inside the furnace chamber is ≤2 Pa, then raise the temperature to 900 °C, and at the same time pass in the mixed gas of hydrogen and argon, keep it warm for 15 minutes, continue to heat up to 1040 °C, and then pass in methane Gas for reaction, the reaction time is 0.5 minutes, stop feeding methane gas after the reactio...

Embodiment 2

[0027] Using foamed aluminum as the substrate, the selected foamed aluminum has an average pore diameter of 500 μm and a thickness of 1.5 mm; use vacuum magnetron sputtering technology to deposit Cu-Ni alloy on the surface of the substrate as a transition metal layer, and its working parameters are: vacuum chamber Bottom vacuum≤5×10 -2Pa, 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, and the average thickness of the transition metal layer is 300 nm; the Cu-Ni alloy will be deposited on the surface Put the aluminum foam in the vacuum furnace chamber, evacuate until the background vacuum inside the furnace chamber is ≤2 Pa, 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 1000 °C, and then The toluene gas was introduced to react, and the reaction time was 5 minutes. After ...

Embodiment 3

[0029] With nickel-iron foam as the substrate, the selected foamed nickel-iron has an average pore diameter of 400 μm and a thickness of 1.8 mm; use vacuum magnetron sputtering technology to deposit Co-Ni alloy on the surface of the substrate as a transition metal layer, and its 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, and the average thickness of the transition metal layer is 400 nm; the Co-Ni alloy will be deposited on the surface Foam nickel-iron is placed in the vacuum furnace cavity, evacuated until the background vacuum inside the furnace cavity is ≤2 Pa, and then the temperature is raised to 750 °C, and the mixed gas of hydrogen and argon is introduced at the same time, and the temperature is kept for 30 minutes, and the temperature is continued to rise to 975 °C. Then feed ethane gas to react, t...

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Abstract

The invention discloses a preparation method for a metal-graphene composite porous electrode material. A transition metal layer is deposed on a porous metallic substrate; and graphene grows on the transition metal layer by using the transition metal layer as a catalyst. The transition metal layer and the graphene layer can superposed mutually on the porous metallic substrate at least once. The prepared electrode material having characteristics of light mass, high specific surface area, high electric conductivity, good thermal conductance capability, and high chemical stability is suitable for batch large-scale production and has the great application value in 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 metal-graphene 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 restricting energy development. The current renewable energy technologies mainly include wind energy, solar energy, and hydroelectric power generation. However, due to their relatively unpredictable and variable characteristics, which have a great impact on the reliability of the power grid, they have not yet 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 renewable energy technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/36B82Y30/00H01M4/36H01M4/38H01M4/587H01M6/14H01M10/052
CPCB82Y30/00H01G11/26H01G11/30H01G11/36H01M4/366H01M4/38H01M4/587H01M6/14H01M10/052Y02E60/10
Inventor 穆俊江韦雁途吴天和
Owner WUZHOU HGP ADVANCED MATERIALS TECH CORP
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