Method for producing bead-stringed PAN (polyacrylonitrile)-based carbon fiber electrode materials by electrostatic spinning

An electrospinning method and carbon fiber electrode technology are applied in the field of preparation of PAN-based carbon fiber electrode materials, which can solve problems such as low capacitance, and achieve the effects of improving specific surface area, simple preparation method, and increasing felt body strength.

Inactive Publication Date: 2012-07-11
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with metal oxides and conductive polymer materials, carbon-based materials have better chemical stability, no pollution and lower cost, but the mechanism of energy storage is mainly based on the electric double layer formed on the carbon surface, so the specific capacitance is lower

Method used

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  • Method for producing bead-stringed PAN (polyacrylonitrile)-based carbon fiber electrode materials by electrostatic spinning
  • Method for producing bead-stringed PAN (polyacrylonitrile)-based carbon fiber electrode materials by electrostatic spinning

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specific Embodiment approach 1

[0009] Specific embodiment one: adopt electrospinning method to prepare the method for bead-chain PAN-based carbon fiber electrode material in this embodiment through the following steps:

[0010] Step 1. Dissolving polyacrylonitrile (PAN), phenolic resin microspheres and dimethylformamide (DMF) at a temperature of 20 to 70°C for 1 to 7 days to obtain a spinning solution with a solid content of 8%~15%, the mass ratio of PAN and phenolic resin microspheres is 1:0.05~2;

[0011] Step 2, adopting electrospinning method to prepare PAN fiber mat;

[0012] Step 3, pre-oxidizing the PAN fiber mat obtained in step 2 at a temperature of 70-250° C. and an air atmosphere for 2-6 hours to obtain a PAN-based pre-oxidized fiber mat;

[0013] Step 4. Put the PAN-based pre-oxidized fiber mat obtained in Step 3 into a tube furnace, feed nitrogen gas at a flow rate of 1-4L / min, and at the same time raise the temperature to 700-1000°C at a rate of 5-10°C / min, and keep it warm. Carry out the ca...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the diameter of the phenolic resin microspheres in Step 1 is 100-5000 nm. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the solid content in the spinning solution described in step 1 is 12%, and the mass ratio of PAN to phenolic resin microspheres is 1:1.2. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A method for producing controllable fibre diameter and sphere diameter bead-stringed PAN (polyacrylonitrile)-based carbon fiber electrode materials by electrostatic spinning relates to a method for producing PAN-based carbon fiber electrode materials. The method is to solve the problem in traditional carbon fiber preparation method process, the feature controllable carbon fiber electrode material is not easy to be obtained. By electrostatic spinning, phenolic resin microspheres are added into spinning dope to produce bead-stringed PAN-based carbon fiber felt electrode materials. The electrode materials have the advantages that the production method is simple and continuous, the diameter of fibers and sphere diameter ratio of bead strings are controllable, and the materials are high in specific capacitance, high in felt strength, large in specific surface area and the like.

Description

technical field [0001] The invention relates to a preparation method of a PAN-based carbon fiber electrode material, in particular to a preparation method of a pearl necklace-shaped PAN-based carbon fiber felt electrode material for a supercapacitor. Background technique [0002] Supercapacitor is a new type of energy storage element between battery and traditional dielectric capacitor, with high specific energy, good reversibility and long cycle life, with its potential application in hybrid or pure electric vehicles as the background And attract attention. With the continuous improvement of the capacity of supercapacitors, the requirements for the storage capacity of electrode materials are also getting higher and higher. There are mainly three kinds of electrode materials currently used in supercapacitors: carbon-based materials, metal oxides, and conductive polymers. Compared with metal oxides and conductive polymer materials, carbon-based materials have better chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/43D04H1/728D06C7/04D01D1/02H01G9/042
CPCY02E60/13
Inventor 金政李博弘田园
Owner HEILONGJIANG UNIV
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