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Method for preparing capacitor electrode material

A technology of capacitor electrodes and syringes, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of no large increase in specific capacitance, harsh conditions, cumbersome steps, etc., and achieve good current charging and discharging The effect of high capacity, short process and simple preparation process

Inactive Publication Date: 2016-01-20
NORTHEAST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The currently obtained nitrogen-doped porous carbon materials with high specific surface area are either carbon materials dominated by microporous structure. Although they have high specific surface area, the specific capacitance has not been greatly improved; or they involve cumbersome steps. , complex process, harsh conditions and high cost limit its further application in supercapacitors

Method used

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  • Method for preparing capacitor electrode material
  • Method for preparing capacitor electrode material
  • Method for preparing capacitor electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Weigh 1.5g of polyacrylonitrile polymer and dissolve it in 10ml of N,N dimethylformamide solution, stir for 24h until uniform and transparent.

[0024] (2) Electrospinning the precursor solution in step (1) to prepare polyacrylonitrile nanofibers. Pour about 2ml of the above solution into a medical syringe each time (note: the volume of the syringe is 10ml; the length of the syringe needle is 2.5cm; the outer diameter of the syringe tip is 0.7mm). The distance between the syringe tip and the collecting plate is 15-20 cm, and the electrode voltage is 10 kV for spinning, so as to obtain a uniform polyacrylonitrile nanofiber cloth with a diameter of about 300-400 nm.

[0025] (3) Dissolve 1.5g of anhydrous ferric chloride and 0.5ml of concentrated hydrochloric acid in 30ml of deionized water and stir for 30 minutes to prepare a mixed aqueous solution of ferric chloride and hydrochloric acid. Put the polyacrylonitrile nanofiber cloth (note: 1cm*2cm) obtained in step (2...

Embodiment 2

[0029] Example 2: The difference between this example and Example 1 is that the amount of aniline monomer in step (3) is 0.2ml. Others are the same as in Example 1.

Embodiment 3

[0030] Example 3: The difference between this example and Example 1 is that the amount of aniline monomer in step (3) is 0.8ml. Others are the same as in Example 1.

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Abstract

The invention provides a method for preparing nitrogen-doped porous carbon nanofiber material with a high specific surface area. The nitrogen-doped porous carbon nanofiber material with the high specific surface area can be obtained by treating electrospun polyacrylonitrile / polyaniline composite nanofibers in an inert atmosphere at an appropriate temperature. Compared with the prior art, the invention uses the electrospun polyacrylonitrile nanofibers directly as a substrate for growing a polyaniline nanowire and synthesizing the electrospun polyacrylonitrile / polyaniline composite nanofibers. In addition to having high content of nitrogen atoms, the composite nanofibers also have an extensive pore structure on the surface. The composite nanofibers can be heat-treated to obtain the nitrogen-doped porous carbon nanofiber material with the high specific surface area. The obtained material is supercapacitor electrode material and has excellent electrochemical properties. In particular, the method for preparing the nitrogen-doped porous carbon nanofiber material with the high specific surface area is simple in preparation process, short in process flow, low in device dependence and suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the technical field of electrochemical capacitors, in particular to a method for preparing capacitor electrode materials. Background technique [0002] As people pay more and more attention to environmental protection and constantly seek clean and efficient forms of renewable energy utilization, supercapacitors have huge potential applications not only in new energy devices such as hybrid vehicles because they have the advantages of both batteries and traditional capacitors Value, also plays an important role in communications, aerospace, national defense, etc., and therefore has become the object of concern and research and development of the majority of scientific research workers. [0003] As a key component of supercapacitors, electrode materials determine the basic characteristics of supercapacitors. Carbon materials are often used as supercapacitor electrode materials because of their cheap and easy availability, wide op...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/86H01G11/38
CPCY02E60/13
Inventor 邵长路苗富军李兴华张昕彤刘益春
Owner NORTHEAST NORMAL UNIVERSITY
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