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Manufacturing method of multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode

A technology of multi-walled carbon nanotubes and supercapacitors, applied in the field of energy storage materials, can solve the problems such as the fact that the equivalent series resistance of electrodes is not significantly improved, the electrical conductivity of carbon nanotubes cannot be reflected, and it is unfavorable for industrial production. The effect of chemical expansion, high charge-discharge cycle stability, and improved electrical conductivity

Inactive Publication Date: 2013-10-23
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of this coaxial structure composite material is relatively complicated and does not utilize industrial production
In addition, since the surface of carbon nanotubes is covered with polyaniline, after being made into electrodes, carbon nanotubes will not be in direct contact with each other, so that the excellent electrical conductivity of carbon nanotubes cannot be reflected, and the equivalent series resistance of electrodes has not been significantly improved.

Method used

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  • Manufacturing method of multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode
  • Manufacturing method of multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode
  • Manufacturing method of multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode

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Effect test

Embodiment 1

[0022] The preparation method of the multi-walled carbon nanotube / polyaniline nanofiber composite supercapacitor electrode of this embodiment is carried out according to the following steps:

[0023] a. Use polystyrene sulfonic acid to disperse multi-walled carbon nanotubes: take 10 mg of multi-walled carbon nanotubes and put them into a beaker, then add 10 ml of deionized water and 300 microliters of polystyrene sulfonic acid multi-walled carbons to the beaker in turn For the nanotube solution, the multi-walled carbon nanotube solution was ultrasonicated for 40 minutes by an inserting ultrasonic instrument to obtain a uniformly dispersed multi-walled carbon nanotube solution;

[0024] b, preparation of polyaniline nanofibers: add 300 microliters of aniline monomer to 10 milliliters of chloroform to obtain the chloroform solution of aniline monomer, and dissolve 183 milligrams of ammonium thiosulfate in 10 milliliters of hydrochloric acid with a concentration of 1mol / L The hyd...

Embodiment 2

[0027] Prepare uniformly dispersed multi-walled carbon nanotube solution and polyaniline nanofibers by the same method as in Example 1, add 56.67mg of clean polyaniline nanofibers into the uniformly dispersed multi-walled carbon nanotube solution, obtain multi-walled carbon nanotubes by ultrasonic tube / polyaniline nanofiber uniform mixture, with nitrogen as carrier gas, the uniform mixture of multi-walled carbon nanotubes / polyaniline nanofibers is sprayed onto a graphite substrate with a surface area of ​​1cm*1cm, and then the sprayed graphite The substrate was put into a vacuum drying oven and dried under vacuum conditions at 60 degrees Celsius for 12 hours to obtain a multi-walled carbon nanotube / polyaniline nanofiber composite supercapacitor electrode with a mass ratio of polyaniline nanofibers of 85%. figure 1 It is the field emission scanning electron micrograph of the multi-walled carbon nanotube / polyaniline nanofiber composite supercapacitor electrode prepared in Example...

Embodiment 3

[0029] Prepare uniformly dispersed multi-walled carbon nanotube solution and polyaniline nanofibers in the same manner as in Example 1, add 30 mg of clean polyaniline nanofibers into the uniformly dispersed multi-walled carbon nanotube solution, and obtain multi-walled carbon nanotubes by ultrasonic / uniform mixture of polyaniline nanofibers, with nitrogen as carrier gas, the uniform mixture of multi-walled carbon nanotubes / polyaniline nanofibers is sprayed onto a graphite substrate with a surface area of ​​1cm*1cm, and then the graphite substrate after spraying Put it into a vacuum drying oven and dry it for 12 hours under a vacuum condition of 60 degrees Celsius to obtain a multi-walled carbon nanotube / polyaniline nanofiber composite supercapacitor electrode with a polyaniline nanofiber mass ratio of 75%.

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Abstract

The invention discloses a manufacturing method of a multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode. The manufacturing method is characterized by including the following steps that firstly, polystyrolsulfon acid is used for scattering a multi-wall carbon nanotube; secondly, a polyaniline nano fiber is manufactured; finally, the multi-wall carbon nanotube and polyaniline nano fiber composite supercapacitor electrode is manufactured. The electrode of a supercapacitor is manufactured by a compound of the carbon nanotube and the polyaniline nano fiber, and the manufacturing method is simple and suitable for industrial production. In addition, the supercapacitor electrode manufactured with the manufacturing method is high in electrical conductivity, low in equivalent resistance and high in charge-discharge cycle stability.

Description

technical field [0001] The invention belongs to the field of energy storage materials, and relates to a preparation method of a supercapacitor electrode, in particular to a preparation method of a multi-walled carbon nanotube / polyaniline nanofiber composite material supercapacitor electrode Background technique [0002] A supercapacitor, also known as an electrochemical capacitor, is an energy storage device that uses the electric field between the positive and negative electrodes to separate the positive and negative ions in the electrolyte for electrical energy storage. Supercapacitors can be divided into two different types: electric double layer capacitors and Faraday capacitors. The electric double layer capacitor uses the interface between the electrode material and the electrolyte to physically adsorb and desorb the positive and negative ions in the electrolyte to form an electric double layer mechanism to store charges, while the Faraday capacitor uses the surface an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86
CPCY02E60/13
Inventor 李强陈翌庆罗林保吴春艳王莉
Owner HEFEI UNIV OF TECH
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