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Polarizable electrode material for electric double layer capacitor having improved withstand voltage, and electric double layer capacitor using same

A technology for electric double layer capacitors and electrode materials, which is applied in the field of polarizable electrode materials for electric double layer capacitors and electric double layer capacitors, can solve the problems of decreased electrostatic capacity, blocked pores, deterioration of organic components, etc., and achieves long-term reliability. The effect of improving performance, preventing clogging of pores, and improving energy density

Active Publication Date: 2013-01-23
W L GORE & ASSOC GK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, other components in the electric double layer capacitor have problems such as degradation of organic components used for adhesives or adhesive layers, coating of activated carbon or spacers, or clogging of fine pores, causing problems in electrostatic capacity decline; or The problem of resistance increase due to peeling of the adhesive surface
In the method of covering the surface functional groups of activated carbon with organosilicon compounds, depending on the manufacturing conditions, there is a problem that not only the surface functional groups are covered, but also the pores of the carbon material are blocked, thereby reducing the electrostatic capacity.

Method used

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  • Polarizable electrode material for electric double layer capacitor having improved withstand voltage, and electric double layer capacitor using same
  • Polarizable electrode material for electric double layer capacitor having improved withstand voltage, and electric double layer capacitor using same
  • Polarizable electrode material for electric double layer capacitor having improved withstand voltage, and electric double layer capacitor using same

Examples

Experimental program
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Effect test

Embodiment 1

[0076] [Polarizable electrode layer]

[0077] The specific surface area measured by the BET method of 80 parts by mass as porous carbon particles is about 1700m 2 / g of water vapor-activated coconut shell activated carbon (“YP-50F” manufactured by Kuraray Chemical Co., Ltd.), 10 parts by mass of acetylene black powder as a conductive additive (Denki Chemical Industry Co., Ltd. Co., Ltd.) "DENKA BLACK (denkabrasuk) powder"), 10 parts by mass of polytetrafluoroethylene powder as a binder (Mitsui DuPont Fluorochemical Co., Ltd. (Mitsui DuPont Fluoro Chemical Co., Ltd.) Fulong 6J (テフロン6J)"), and 10 mass of tungsten trioxide (manufactured by Kanto Chemical Co., Ltd. (Kanto Chemical Co., Ltd.), tungsten oxide (Cica first grade), average particle size 30 μm), After adding 30 parts by mass of ethanol and kneading, the paste was extruded in a ribbon shape.

[0078] Thereafter, the obtained ribbon was rolled three times to form a sheet, and then dried at 150° C. for 1 hour to remove e...

Embodiment 2

[0086] Except having used 2 mass parts of the usage-amount of tungsten trioxide, it carried out similarly to Example 1.

Embodiment 3

[0088] Except that the usage-amount of tungsten trioxide was 40 mass parts, it carried out similarly to Example 1.

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Abstract

Disclosed are: a polarizable electrode material for an electric double layer capacitor with high withstand voltage, said electric double layer capacitor having high energy density and being suppressed in deterioration of capacitance and resistance over time, thereby achieving excellent long-term reliability; and an electric double layer capacitor which uses the polarizable electrode material for an electric double layer capacitor with high withstand voltage. Specifically disclosed is a polarizable electrode material which is characterized by being used in an electric double layer capacitor and containing porous carbon particles, a conductive assistant, a tungsten oxide powder and a binder.

Description

field of invention [0001] The present invention relates to a polarizable electrode material for an electric double layer capacitor with improved voltage resistance for the purpose of improving energy density and long-term reliability, and an electric double layer capacitor using the material. Specifically, it relates to a polarizable electrode material for a high withstand voltage type electric double layer capacitor capable of obtaining a high energy density, less degradation over time, such as a decrease in capacitance over time or an increase in resistance over time, and excellent long-term reliability, and Electric double layer capacitors using this material. Background of the invention [0002] An electric double layer capacitor is an electrical storage element that utilizes the electrostatic capacity of an electric double layer formed by adsorption / desorption of electrolyte ions at the interface between a pair of positive and negative polarizable electrodes and an elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/42H01G11/22H01G11/24H01G11/28H01G11/38H01G11/44H01G11/86
CPCY02T10/7022Y02E60/13H01G11/38H01G11/42H01G9/0425H01G9/058Y02T10/70H01G11/32H01G11/22
Inventor 伊藤荣记则枝博之小林康太郎
Owner W L GORE & ASSOC GK
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