Preparation method of vanadium oxide nanobelt/nickel foam 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 materials, can solve the problems of difficult commercial applications, low electronic conductivity and ion conductivity, and poor structure. Stability and other issues, to achieve the effect of reducing sample morphology damage, increasing active injection sites, and large surface active area

Active Publication Date: 2021-09-24
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 nanobelt/nickel foam composite self-supporting electrode material
  • Preparation method of vanadium oxide nanobelt/nickel foam composite self-supporting electrode material
  • Preparation method of vanadium oxide nanobelt/nickel foam composite self-supporting electrode material

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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

This application relates to a preparation method of vanadium oxide nanobelt / nickel foam composite electrode material, which uses hydrothermal reaction and sintering post-treatment to directly attach vanadium pentoxide to nickel foam, which not only reduces the slurry coating in the battery assembly process and other processes, and the contact between vanadium pentoxide nanobelt and nickel foam is very good, which is convenient to enhance electron transport, which is conducive to the insertion / extraction of lithium ions in the material, and greatly reduces the common problem of sample morphology being destroyed during charging and discharging. , enhanced cycle stability. Moreover, through the selection of surfactants, more nano-sized vanadium pentoxide is attached to the nickel foam, so that vanadium pentoxide produces more nanobelts, which shortens the diffusion distance of lithium ions and improves the efficiency of vanadium pentoxide. The kinetic performance of the cathode material can meet the needs of fast charge and discharge. At the same time, the nano-vanadium pentoxide material has a large surface active area, which can fully contact with the electrolyte and 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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Patent Type & Authority Patents(China)
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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