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Preparation method of vanadium oxide nanoribbon-foam nickel composite self-supporting electrode material

A self-supporting electrode, vanadium pentoxide nanotechnology, applied in the field of preparation of vanadium oxide nanobelt/foam nickel composite self-supporting electrode material, can solve the problems of difficult commercial application, unstable structure, electronic conductivity and ion conductivity Low-level problems, to achieve the effect of reducing sample morphology damage, large surface active area, and increasing active injection sites

Active Publication Date: 2019-04-12
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its unstable structure and inherent low electronic and ionic conductivity, it is difficult to put it into commercial application.

Method used

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  • Preparation method of vanadium oxide nanoribbon-foam nickel composite self-supporting electrode material
  • Preparation method of vanadium oxide nanoribbon-foam nickel composite self-supporting electrode material
  • Preparation method of vanadium oxide nanoribbon-foam nickel composite self-supporting electrode material

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Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing a vanadium oxide nanobelt / nickel foam composite self-supporting electrode material, comprising the following steps:

[0028] S1: Take vanadium pentoxide powder and add it to deionized water, add hydrogen peroxide dropwise to the deionized water under stirring to completely dissolve the vanadium pentoxide powder, and then add a surfactant to the solution to obtain a vanadium-containing solution. The agent is a block copolymer of polyethylene oxide and polypropylene oxide, the molecular weight of polyethylene oxide in the block copolymer of polyethylene oxide and polypropylene oxide is 5000-20000, polypropylene oxide The molecular weight of the block is 2000-5000, and the concentration of the surfactant in the vanadium-containing solution is 4.8g / L;

[0029] S2: Put the nickel foam in the vanadium-containing solution, and react under pressure and heating conditions. The reaction temperature of the foam nickel and the vanadiu...

Embodiment 2

[0032] This embodiment provides a method for preparing a vanadium oxide nanobelt / nickel foam composite self-supporting electrode material, comprising the following steps:

[0033] S1: Take vanadium pentoxide powder and add it to deionized water, add hydrogen peroxide dropwise to the deionized water under stirring to completely dissolve the vanadium pentoxide powder, and then add a surfactant to the solution to obtain a vanadium-containing solution. The agent is a block copolymer of polyethylene oxide and polyacrylic acid, the molecular weight of polyethylene oxide in the block copolymer of polyethylene oxide and polyacrylic acid is 2000-5000, and the molecular weight of the polyacrylic acid block is 2000 ~10000, the concentration of the surfactant in the vanadium-containing solution is 7.5g / L;

[0034] S2: Put the nickel foam in the vanadium-containing solution, and react under pressure and heating conditions. The reaction temperature of the foam nickel and the vanadium-contai...

Embodiment 3

[0037] This embodiment provides a method for preparing a vanadium oxide nanobelt / nickel foam composite self-supporting electrode material, comprising the following steps:

[0038] S1: Take vanadium pentoxide powder and add it to deionized water, add hydrogen peroxide dropwise to the deionized water under stirring to completely dissolve the vanadium pentoxide powder, and then add a surfactant to the solution to obtain a vanadium-containing solution. The agent is a block copolymer of polyethylene oxide and polyacrylic acid, the molecular weight of polyethylene oxide in the block copolymer of polyethylene oxide and polyacrylic acid is 2000-5000, and the molecular weight of the polyacrylic acid block is 2000 ~10000, the concentration of the surfactant in the vanadium-containing solution is 10g / L;

[0039] S2: Put the nickel foam in the vanadium-containing solution, and react under pressure and heating. The reaction temperature of the foamed nickel and the vanadium-containing solut...

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Abstract

The invention relates to a preparation method of a vanadium oxide nanoribbon-foam nickel composite self-supporting electrode material. Due to the fact that vanadium pentoxide is directly attached to foam nickel by adopting a hydrothermal reaction and post-sintering treatment, not only are the processes of size mixing, coating and the like in the battery assembly process omitted, but also the vanadium pentoxide nanoribbons make contact with foam nickel very well, electron transport can be enhanced, intercalation and deintercalation of lithium ions in the material are promoted, the ubiquitous problem that the sample morphology is destroyed in charging and discharging is significantly reduced, and the cycling stability is enhanced; in addition, by means of selection of a surface active agent,more nano vanadium pentoxide can be attached to foam nickel, therefore, vanadium pentoxide can generate more nanoribbons, the diffusion distance of the lithium ions is shortened, the dynamic performance of vanadium oxide as a cathode material is improved, and the quick charging and discharging requirement can be met; and meanwhile, the nano vanadium pentoxide material has the large surface activearea and can well and fully make contact with an electrolyte solution to improve the capacity of the electrode material.

Description

technical field [0001] The application belongs to the technical field of energy storage, and in particular relates to a method for preparing a vanadium oxide nanobelt / foam nickel composite self-supporting electrode material. Background technique [0002] Lithium-ion batteries have the advantages of high mobility, stable working voltage, high cycle efficiency, large capacity, etc., and the pollution to the environment during work is negligible, which is in line with the concept of green environmental protection advocated by today's society. Ideal green new energy for human development. The negative electrode is one of the key parts of lithium-ion batteries. The performance of lithium batteries in all aspects depends to a certain extent on the negative electrode materials. The negative electrode materials that have been researched and widely used in lithium-ion batteries are: carbon, non-carbon class and nanoscale. The vanadium pentoxide nanobelt shortens the diffusion dista...

Claims

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Application Information

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IPC IPC(8): H01M4/1391H01M4/04H01M4/485H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/0416H01M4/0471H01M4/1391H01M4/485H01M10/0525Y02E60/10
Inventor 肖启振张鑫雷钢铁李朝晖张劲
Owner XIANGTAN UNIV
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