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Electrode plate for electric double layer capacitor and preparation method of electric double layer capacitor

A technology of electric double-layer capacitors and electrode sheets, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrolytic capacitors, capacitors, etc., can solve the problems affecting the energy density of electric double-layer capacitors, the high mass ratio of aluminum/composite electrodes, etc., and achieve quality The effect of low ratio, improved energy density, and reduced manufacturing cost

Active Publication Date: 2012-08-29
SAMXON ELECTRONICS DONG GUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because aluminum only plays a conductive role and does not contribute to the capacity of the electric double layer capacitor, the aluminum / composite electrode mass ratio obtained by the above technology is still relatively high, which affects the energy density of the electric double layer capacitor to a certain extent

Method used

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Examples

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preparation example Construction

[0026] The preparation method of the electrode sheet for an electric double layer capacitor of the present invention comprises the steps of: preparing activated carbon fiber cloth, so that the activated carbon fiber cloth has a thickness of 1000m 2 / g-2000m 2 / g specific surface area, 0.5mm-1mm thickness, 100g / m 2 -200g / m 2Area density; composite the conductive high molecular polymer with activated carbon fiber cloth, the conductive high molecular polymer is any one of poly 3,4-ethylenedioxythiophene, polyaniline, polypyrrole, to make activated carbon fiber A composite electrode made of cloth and a conductive polymer; washing the composite electrode in deionized water to remove excess impurity ions on the composite electrode;

[0027] In the preparation method of the electrode sheet for an electric double layer capacitor, preferably, the specific surface area of ​​the activated carbon fiber cloth is 1500m 2 / g, thickness is 0.8mm.

[0028] In the preparation method of the ...

Embodiment 1

[0036] Embodiment 1: Activated carbon fiber cloth and conductive high molecular polymer composite electric double layer capacitor of the present invention Production Method:

[0037] Step 1: use 3,4-ethylenedioxythiophene as a conductive polymer monomer, and use butanol as a solvent to prepare a solution of a conductive polymer monomer. The solution concentration is 40%, and iron p-toluenesulfonate is used as An oxidizing agent, using butanol as a solvent to prepare an oxidizing agent solution with a solution concentration of 40%, wherein iron p-toluenesulfonate is used as both an oxidizing agent and a dopant. Spray 3,4-ethylenedioxythiophene butanol solution and iron p-toluenesulfonate butanol solution on one surface of the activated carbon fiber cloth respectively by air pressure spraying, and heat at 50°C to make the monomer completely on the surface of the activated carbon fiber cloth polymerization.

[0038] Step 2: Wash in deionized water to remove excess iron ions, ...

Embodiment 2

[0041] Embodiment 2: Activated carbon fiber cloth and conductive polymer composite electric double layer capacitor of the present invention Preparation:

[0042] Step 1: using aniline as a conductive polymer monomer and water as a solvent to prepare a conductive polymer monomer solution with a solution concentration of 10%, and adding polystyrenesulfonic acid as a dopant. Ammonium persulfate is used as an oxidizing agent and water is used as a solvent to prepare an oxidizing agent solution with a solution concentration of 20%.

[0043] Step 2: Spray the aniline solution and ammonium persulfate solution added with styrene sulfonic acid to one surface of the activated carbon fiber cloth respectively by air pressure spraying, and place it at room temperature so that the conductive polymer monomer is completely on the surface of the activated carbon fiber cloth. polymerization. Wash in deionized water to remove excess impurity ions, and dry at 120°C. The thickness of the spr...

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Abstract

The invention provides an electrode plate for an electric double layer capacitor and a preparation method of the electric double layer capacitor. The preparation method of the electrode plate comprises the following steps: preparing activated carbon fiber cloth; compounding conducting high molecular polymer with the activated carbon fiber cloth to prepare an activated carbon fiber cloth / conducting high molecular polymer combined electrode, wherein the conducting high molecular polymer is poly(3,4-ethylenedioxythiophene), polyaniline or polypyrrole; washing the combined electrode in de-ionizedwater to remove excess foreign ions on the combined electrode; and drying the combined electrode the foreign ions of which are removed to prepare the electrode plate. The invention increases the bonding area of the conducting high molecular polymer and activated carbon fibers, enhances the contact performance among the activated carbon fibers and between the activated carbon fiber cloth and a collector electrode, reduces the mass ratio of the conducting high molecular polymer to the combined electrode, increases the energy density of the electric double layer capacitor and greatly lowers the equipment requirement and manufacturing cost.

Description

technical field [0001] The invention relates to an electric double-layer capacitor, in particular to a preparation method of an electrode sheet for an electric double-layer capacitor and a preparation method of an electric double-layer capacitor using the electrode sheet. Background technique [0002] A supercapacitor is an energy storage element based on the electrochemical process at the electrode / solution interface. The charge storage of a supercapacitor occurs on the electric double layer formed by the electrode and the electrolyte, as well as underpotential deposition, electrochemical adsorption, desorption, and redox on the electrode surface. The migration of the generated charges. Its capacity is 20 to 200 times that of traditional capacitors, up to farad level or even thousand farad level, and its specific power is more than 10 times that of batteries. It has the characteristics of fast speed, no pollution to the environment, long cycle life, and wide temperature ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/058H01G9/155H01G11/86
CPCY02E60/13
Inventor 纪力荣赵方辉李锐
Owner SAMXON ELECTRONICS DONG GUAN
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