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Electric double layer capacitor

A technology for electric double layer capacitors and capacitors, applied in the direction of electrolytic capacitors, capacitors, capacitor components, etc., can solve the problems of undisclosed capacitor energy density information, unrecorded fully thinned capacitors, and failure to meet the conditions for miniaturization of capacitors, etc.

Inactive Publication Date: 2007-12-12
TEIJIN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the capacitor disclosed in Japanese Patent Application Publication No. 2002-532869, no information on the energy density of the capacitor is disclosed, and the condition for realizing miniaturization required by the capacitor is not satisfied.
In addition, from the viewpoint of achieving thinner capacitors, there is no description of sufficiently thinned capacitors, for example, capacitors with a thickness of 2 mm or less, and no proposal is made on how to realize such thin capacitors.

Method used

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  • Electric double layer capacitor
  • Electric double layer capacitor
  • Electric double layer capacitor

Examples

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Embodiment 1

[0047] Compared with conventional electric double layer capacitors, the electric double layer capacitor according to the first embodiment can achieve higher output, especially higher output in a low temperature environment. Therefore, it is effective for applications requiring strict characteristics in a low-temperature environment, specifically, hybrid electric vehicles (HEVs).

[0048] In Example 1, an electric double layer capacitor comprising a pair of electrodes, a separator, and a non-aqueous electrolytic solution made of activated carbon is characterized in that the average particle diameter of the activated carbon is 0.1 μm or more and less than 0.1 μm. 1.0 microns. Hereinafter, the activated carbon used in the electric double layer capacitor of the present invention is referred to as submicron activated carbon. The average particle size of activated carbon in conventional general electric double layer capacitors is about 10 to 100 microns, and activated carbons on th...

example 1

[0096] Activated carbon (manufactured by Kansai Thermochemical Co., Ltd.: trade name MSP20) with an average particle diameter (D50) of 10 μm is wet-milled using dimethylacetamide (DMAc) as a dispersion solvent (zirconia beads with a diameter of 2 mm crushing), so as to obtain activated carbon with an average particle diameter of 0.6 micron (D50). The BET specific surface area of ​​the activated carbon is 1531m 2 / g. This activated carbon was referred to as trial activated carbon 1.

example 2

[0098] Melt and knead poly-4-methylpentene-1 ( TPX: 100 parts by weight of grade RT-18 (manufactured by Mitsui Chemicals, Inc.) and 11.1 parts by weight of mesophase pitch AR-HP (manufactured by Mitsubishi Gas Chemicals, Inc.) as a thermoplastic carbon precursor were prepared as a mixture. The dispersion diameter of the thermoplastic carbon precursor in the thermoplastic resin of the mixture obtained under this condition is 0.05-2 microns. In addition, the mixture was kept at 300° C. for 10 minutes, no aggregation of the thermoplastic carbon precursor was found, and the dispersion diameter was 0.05 to 2 microns.

[0099] Next, the above-mentioned mixture was spun at 340° C. at 120 m / min using a 0.2 mm metal cap to prepare a precursor fiber. Using 100 parts by weight of decalin per part by weight of the precursor fiber, the thermoplastic resin was melted at 150° C. and filtered to obtain a stabilized precursor fiber. After mixing 3 parts by weight of acetylene black into 100 ...

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Abstract

The present invention concerns an electric double layer capacitor, wherein to increase capacitance, each electrode is formed from activated carbon having an average particle size of 0.1 to 1.0 mum. Alternatively, to prevent electrode short-circuiting, each electrode is constructed from an electrode layer sheet having an electrode layer formed from activated carbon whose specific area is 500 to 2500 m2 / g and whose cumulative particle size (D90) is 0.8 to 6 mum.

Description

technical field [0001] The present invention relates to an electric double layer capacitor comprising a pair of electrodes constituting a positive electrode and a negative electrode, a separator, and an electrolytic solution, and more particularly to a small capacitor having high output characteristics and high capacity density, or high output characteristics and high capacity density. Ultra-thin electric double layer capacitor. [0002] In addition, the present invention particularly relates to an electric double layer capacitor comprising a pair of electrode sheets constituting a positive electrode and a negative electrode, a separator, and a non-aqueous electrolyte solution, capable of achieving high output even in a low-temperature environment, and further relates to a capacitor using a porous Electric double layer capacitors with polarizable electrodes made of carbonaceous materials. Background technique [0003] Currently, capacitors such as electric double layer capa...

Claims

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Application Information

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IPC IPC(8): H01G9/155H01G9/058H01G9/02H01G9/08H01G11/36
CPCY02T10/7022Y02E60/13H01G11/34
Inventor 金辰一郎定延治朗西川聪佐野弘树樱井博志北原麻衣
Owner TEIJIN LTD