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Carbon-coated nickel-based thin film electrode material, preparation method and application thereof

A carbon-coated nickel-based, thin-film electrode technology, applied in the preparation/purification of carbon, nanotechnology for materials and surface science, battery electrodes, etc., can solve the problems of application limitations, poor conductivity and stability, and achieve The preparation method is simple, the performance is good, and the effect of enhancing cycle stability

Active Publication Date: 2020-09-04
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its application is limited due to its poor conductivity and stability

Method used

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  • Carbon-coated nickel-based thin film electrode material, preparation method and application thereof
  • Carbon-coated nickel-based thin film electrode material, preparation method and application thereof
  • Carbon-coated nickel-based thin film electrode material, preparation method and application thereof

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preparation example Construction

[0033]

[0034] Such as figure 1 Shown, the preparation method of carbon-coated nickel-based thin film electrode material of the present invention comprises the steps:

[0035] (1), the preparation of nickel nanowire thin film: uniformly disperse nickel nanowire in the dispersant, dry naturally after vacuum filtration, the filter membrane falls off, then press and slice to obtain nickel nanowire thin film;

[0036] (2), the preparation of nickel / nickel hydroxide film: the nickel nanowire film and hydrogen peroxide solution are mixed and put into the autoclave, after hydrothermal reaction treatment, the product is washed and dried to obtain nickel / nickel hydroxide film;

[0037] (3), preparation of carbon-coated nickel-based thin film electrode material: after mixing nickel / nickel hydroxide film and glucose solution, put it into an oven for hydrothermal reaction, obtain carbon-coated nickel-based thin film electrode material after washing and drying, That is, carbon coated ...

Embodiment 1

[0054] The preparation method of the carbon-coated nickel-based thin film electrode material of the present embodiment comprises the following steps:

[0055] (1) Uniformly disperse the nickel nanowires in 1 wt % polyvinylpyrrolidone ethanol solution, vacuum filter, then dry naturally for 10 minutes, and finally press the nickel nanowires under 10 MPa for 5 minutes to prepare the nickel nanowire film.

[0056] (2) Mix 32mg of nickel nanowire film and 20mL of 15wt% hydrogen peroxide solution into a 50mL polytetrafluoroethylene autoclave, conduct a hydrothermal reaction at 140°C for 12h, and then wash the product with deionized water And dry at 60°C for 6h to obtain a nickel / nickel hydroxide film.

[0057](3) Put 30mg of nickel / nickel hydroxide film into 30mL of 1mg / mL glucose solution, conduct a hydrothermal reaction in an oven at 120°C for 5h, clean up after the reaction, and finally obtain a carbon-coated nickel-based film electrode material .

[0058] The prepared electrod...

Embodiment 2

[0060] The preparation method of the carbon-coated nickel-based thin film electrode material of the present embodiment comprises the following steps:

[0061] (1) Uniformly disperse the nickel nanowires in 1 wt % polyvinylpyrrolidone ethanol solution, vacuum filter, then dry naturally for 10 minutes, and finally press the nickel nanowires under 9 MPa for 3 minutes to prepare the nickel nanowire film.

[0062] (2), 50mg of nickel nanowire film and 50mL of 20wt% hydrogen peroxide solution were mixed into a 100mL polytetrafluoroethylene autoclave, hydrothermally reacted at 140°C for 8h, and then the product was washed with deionized water And dry at 65°C for 7h to obtain a nickel / nickel hydroxide film.

[0063] (3) Put 40mg of nickel / nickel hydroxide film into 50mL of 2mg / mL glucose solution, conduct a hydrothermal reaction in an oven at 120°C for 10h, and clean it up after the reaction is over to obtain a carbon-coated nickel-based film electrode material .

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Abstract

The invention provides a carbon-coated nickel-based thin film electrode material, a preparation method and application thereof. The preparation method comprises the following steps: dispersing nickelnanowires in a dispersing agent, carrying out suction filtration, drying, removing a filter membrane, tabletting and slicing to obtain a nickel nanowire film, mixing the nickel nanowire film with a hydrogen peroxide solution, carrying out hydrothermal reaction treatment, washing the product, drying to obtain a nickel / nickel hydroxide film, mixing the nickel / nickel hydroxide film with a glucose solution, and carrying out a hydrothermal reaction. According to the electrode material disclosed by the invention, a nickel nanowire film is used as a matrix, a nickel / nickel hydroxide film energy storage electrode material is prepared by a hydrothermal method and a carbon coating method, the conductivity and the cycling stability of the electrode material can be improved by carbon coating, and theelectrode material has the characteristics of high volume capacity, excellent rate capability and the like, so that the electrode material is applied to capacitors or batteries; and the conductivity of the nickel-based electrode material can be improved and the stability of the nickel-based electrode material can be enhanced through carbon coating, so that the cycling stability of the electrode isenhanced and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of energy storage electrode materials, and in particular relates to a carbon-coated nickel-based thin-film electrode material and a preparation method and application thereof. Background technique [0002] Supercapacitor, also known as electrochemical capacitor, is a new type of electrochemical energy storage device, which has attracted more and more attention in recent years. Compared with energy storage devices such as lithium-ion batteries, supercapacitors have the advantages of fast charge and discharge, long service life, high power density, low internal resistance, and greater energy density than traditional capacitors. Therefore, it is often used in areas requiring long cycle times and high power density, including personal electronics, hybrid vehicles, and backup power supplies. With the continuous expansion of application fields, the requirements for electrode materials are also gett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36H01M4/38H01M4/52H01M4/62C01B32/05C01G53/04B82Y30/00B82Y40/00
CPCH01G11/36H01G11/30H01M4/38H01M4/52H01M4/625C01B32/05C01G53/04B82Y30/00B82Y40/00C01P2006/40C01P2004/03Y02E60/10
Inventor 李庚泽徐书生梁炜林高生
Owner SHANGHAI UNIV OF ENG SCI
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