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Sea urchin-like amorphous carbon/nickel foam composites and their preparation methods and applications in supercapacitors

A technology of amorphous carbon and composite materials, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. The effect of ion diffusion channels

Active Publication Date: 2022-07-12
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the rapid charge and discharge process, the metal continuously undergoes oxidation-reduction reactions, expands and contracts continuously, and then falls off, which seriously limits the service life of the material.

Method used

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  • Sea urchin-like amorphous carbon/nickel foam composites and their preparation methods and applications in supercapacitors
  • Sea urchin-like amorphous carbon/nickel foam composites and their preparation methods and applications in supercapacitors
  • Sea urchin-like amorphous carbon/nickel foam composites and their preparation methods and applications in supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A sea urchin-like amorphous carbon / foamed nickel composite material comprises sea urchin-like amorphous carbon and foamed nickel, wherein the sea urchin-like amorphous carbon is supported on the foamed nickel.

[0050] In this example, the mass ratio of the sea urchin-shaped amorphous carbon to the foamed nickel in the sea urchin-shaped amorphous carbon / foamed nickel composite material is 35%.

[0051] In this example, the sea urchin-shaped amorphous carbon grows uniformly on the skeleton of the nickel foam; the average particle size of the sea urchin-shaped amorphous carbon is 8-10 μm, and the inside of the sea urchin-shaped amorphous carbon is embedded with metal cobalt and oxide Cobalt is surrounded in its interior, wherein the ratio of the total molar amount of metal cobalt and cobalt oxide to the molar amount of amorphous carbon is controlled in the range of 1:8-10.

[0052] A preparation method of the sea urchin-shaped amorphous carbon / foamed nickel composite mate...

Embodiment 2

[0071] A sea urchin-shaped amorphous carbon / foam nickel composite material, which is basically the same as Example 1, except that the mass ratio of sea urchin-shaped amorphous carbon to foam nickel in the sea urchin-shaped amorphous carbon / foamed nickel composite material of Example 2 30%.

[0072] A preparation method of the sea urchin-shaped amorphous carbon / foamed nickel composite material in the above-mentioned present embodiment is basically the same as that of embodiment 1, except that in the preparation method of embodiment 2, the used cobalt-based metal organic framework precursor The body solution contained 0.174 g of cobalt nitrate hexahydrate, 0.775 g of polyvinylpyrrolidone and 0.115 g of trimesic acid.

[0073] The sea urchin-like amorphous carbon / nickel foam composite material prepared above was used as the working electrode for the charge-discharge test, and other conditions were the same as those in Example 1.

[0074] The charge-discharge test results show th...

Embodiment 3

[0076] A sea urchin-shaped amorphous carbon / foamed nickel composite material, which is basically the same as Example 1, except that the mass ratio of sea urchin-shaped amorphous carbon to foamed nickel in the sea urchin-shaped amorphous carbon / foamed nickel composite material of Example 3 40%.

[0077] A preparation method of the sea urchin-shaped amorphous carbon / foamed nickel composite material in the above-mentioned present embodiment is basically the same as that of embodiment 1, except that in the preparation method of embodiment 3, the used cobalt-based metal organic framework precursor The body solution contained 0.261 g of cobalt nitrate hexahydrate, 0.775 g of polyvinylpyrrolidone and 0.115 g of trimesic acid.

[0078] The sea urchin-like amorphous carbon / nickel foam composite material prepared above was used as the working electrode for the charge-discharge test, and other conditions were the same as those in Example 1.

[0079] The charge-discharge test results sho...

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Abstract

The invention discloses a sea urchin-shaped amorphous carbon / foamed nickel composite material, a preparation method and an application in a super capacitor. The sea urchin-shaped amorphous carbon / foamed nickel composite material includes foamed nickel and amorphous carbon supported on the foamed nickel, and the amorphous carbon is sea urchin-shaped; the preparation method includes using a cobalt-based metal organic framework as a precursor, passing through water heat, the precursor is loaded on the foamed nickel, and it is calcined to prepare the sea urchin-like amorphous carbon / foamed nickel composite. The sea urchin-shaped amorphous carbon / nickel foam composite material of the invention has the advantages of stable structure and high specific capacitance, can be directly used as an electrode material for electrochemical energy storage, and has the advantages of low energy consumption, stable structure, good energy storage effect and the like.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and relates to a sea urchin-shaped amorphous carbon / foamed nickel composite material, a preparation method thereof, and an application in a supercapacitor. Background technique [0002] Supercapacitors offer a new direction for the development of energy storage devices due to their superior cycle life, power density, and charge-discharge rate over conventional capacitors and rechargeable batteries. According to the mechanism of charge storage, existing supercapacitors can be divided into two types: electric double-layer capacitors and pseudocapacitors. Electric double layer capacitors mainly rely on the accumulation effect of electric charge in the electric double layer. Pseudocapacitors mainly rely on fast redox reactions during charging and discharging. For now, the further development of supercapacitors is mainly to improve their energy density. Various materials, such as p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/32H01G11/86
CPCH01G11/24H01G11/86H01G11/32Y02E60/13
Inventor 黄丹莲陈亚诗雷蕾程敏许飘陈莎杜立肖睿豪
Owner HUNAN UNIV
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