Preparation method of nitrogen-doped carbon nanofiber-loaded nickel cobalt oxide composite electrode material

A technology of nanofibers and nitrogen-doped carbon, which is applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, nanotechnology, etc., can solve the problem of low capacitance and improve the overall specific capacitance, high specific capacitance, long diameter greater effect than

Inactive Publication Date: 2017-12-01
张娟
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Problems solved by technology

Among them, electric double layer capacitors are mainly made of carbon materials, which have the advantages of excellent electrical...

Method used

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Embodiment Construction

[0022] A preparation method of nitrogen-doped carbon nanofiber loaded nickel cobalt oxide composite electrode material, comprising the following specific steps:

[0023] (1) Polyaniline / polyacrylonitrile composite nanofiber:

[0024] Weigh 15 parts by weight of polyaniline and dissolve it in a mixed solution of acetone and N,N-dimethylformamide, stir evenly for 60 minutes, then weigh 50 parts of polyacrylonitrile and dissolve it in the above mixed solution of polyaniline, after dissolving , stirred evenly with a magnetic stirrer for 16 hours, prepared into a polyaniline / polyacrylonitrile electrospinning solution, stood still for 4 hours to remove air bubbles, and then transferred to a syringe, and used a syringe pump for electrospinning to obtain polyaniline / polypropylene Nitrile composite nanofibers;

[0025] (2) Carbonization treatment:

[0026] Put the above-mentioned composite nanofibers in a reaction kettle, raise the temperature to 250°C at a rate of 2°C / min, keep it w...

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Abstract

The invention discloses a preparation method of a nitrogen-doped carbon nanofiber-loaded nickel cobalt oxide composite electrode material. Polyaniline/polyacrylonitrile composite nanofiber is prepared through an electrostatic spinning technology; nitrogen-doped carbon nanofiber is obtained after carbonization treatment, and the nitrogen-doped carbon nanofiber has the advantages of high length-diameter ratio, low cost and the like; by lowering the diameter of the nanometer carbon fiber, the specific surface area of the nanometer carbon fiber can be enlarged, so that more contributions can be made for an electrical double-layer capacitor; in addition, by introduction of nitrogen atoms, the conductivity and the stability of the composite material can be improved; by virtue of nitrogen doping, a part of pseudocapacitor can be contributed, so that a supercapacitor assembled by the material can show higher specific capacitance; and the surface of the carbon nanofiber is loaded with NiCo<2>O<4> nanowires by adopting a solvothermal method, so that the composite electrode material has the characteristics of the faradaic pseudocapacitor and the electrical double-layer capacitor, and the overall specific capacitance of the electrode material can be improved.

Description

technical field [0001] The invention relates to the field of composite electrode materials, in particular to a method for preparing a nitrogen-doped carbon nanofiber loaded nickel cobaltate composite electrode material. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have the advantages of high power density and energy density, fast charge and discharge, and long cycle life. Electrochemical capacitors are divided into electric double layer electrochemical capacitors and Faraday pseudocapacitors according to the principle of energy storage. Among them, electric double layer capacitors are mainly made of carbon materials, which have the advantages of excellent electrical conductivity, fast ion diffusion speed, large specific surface area, and high power density, but generally have low specific capacitance. In contrast, transition metal oxides with Faradaic pseudocapacitive properties, such as RuO 2 , MnO 2 , NiO, Co 3 o 4 , CoO, et...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/40H01G11/36H01G11/46H01G11/86B82Y30/00B82Y40/00
CPCY02E60/13H01G11/30B82Y30/00B82Y40/00H01G11/36H01G11/40H01G11/46H01G11/86
Inventor 张娟
Owner 张娟
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