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Electrochemical capacitor electrode production method

A capacitor electrode, electrochemical technology, applied in the direction of capacitor electrode, hybrid capacitor electrode, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of inability to properly control the formation area of ​​the primer layer, deterioration of electrochemical capacitor characteristics, and uneven thickness To achieve the effect of good characteristics, enhanced adhesion, and improved surface properties

Inactive Publication Date: 2006-11-22
TDK CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these physical characteristics cannot be realized, the formation area of ​​the undercoat layer cannot be properly controlled, the unevenness of the thickness and the internal resistance increase, and other problems that cause the deterioration of the characteristics of the electrochemical capacitor arise

Method used

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  • Electrochemical capacitor electrode production method
  • Electrochemical capacitor electrode production method
  • Electrochemical capacitor electrode production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] The conductive particles used in the coating liquid X for the undercoat layer were prepared by mixing 33 parts by weight of acetylene black (product name: Denka Black, manufactured by Denki Kagaku Kogyo) and 33 parts by weight of graphite using a planetary disperser for 15 minutes . Add 35 parts by weight of fluorine rubber (product name: Viton-GF, manufactured by DuPont Dow Elastomer) as a binder and 140 parts by weight of methyl isobutyl ketone (MIBK) as a solvent (good solvent) in the mixture of all weights. ), and the mixture was kneaded for 45 minutes using a planetary disperser.

[0087] Subsequently, 119 parts by weight of the above-mentioned fluororubber as a binder, 1543 parts by weight of MIBK (good solvent) as a solvent, and 297 parts by weight of propylene carbonate (poor solvent) were added. The mixture was stirred for 4 hours to prepare a coating solution X for an undercoat layer. The weight ratio (P / B) of electroconductive particle (P) and binder (B) wa...

Embodiment 2

[0099] Except that the amount of the fluororubber added to the mixture was set to 229 parts by weight when preparing the coating liquid X for the undercoat layer of Example 1, and the amount of the solvent was changed so that it was used for the coating of the undercoat layer The electrode sheet sample of Example 2 was produced in the same manner as in Example 1 except that the viscosity of the liquid X was 0.37 Pa·s.

[0100] Thus, in Example 2, the weight ratio (P / B) of the conductive particles (P) and the binder (B) contained in the coating liquid X for an undercoat layer was 20 / 80.

Embodiment 3

[0102] Except that the amount of the fluororubber added to the mixture was set to 64 parts by weight when preparing the coating liquid X for the undercoat layer of Example 1, and the amount of the solvent was changed so that the coating liquid X for the undercoat layer was The electrode sheet sample of Example 3 was produced in the same manner as in Example 1 except that the viscosity of the liquid X was 0.37 Pa·s.

[0103] Thus, in Example 3, the weight ratio (P / B) of the conductive particles (P) and the binder (B) contained in the coating liquid X for an undercoat layer was 40 / 60.

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Abstract

The present invention provides a method that can be used to optimize the physical properties of a coating solution for an undercoat layer formed between a polarizable electrode layer and a surface roughened current collector. The first step is performed to form an undercoat layer on the current collector whose surface has been roughened, and the second step is performed to form a polarizable electrode layer on the undercoat layer. The first step is performed by coating the current collector with a coating liquid for the undercoat layer, the coating liquid containing conductive particles, a binder and a solvent; the viscosity of the coating liquid for the undercoat layer is set. It is set to 0.15 Pa·s to 0.75 Pa·s, and the weight ratio (P / B) of the conductive particles (P) to the binder (B) is set to be 20 / 80 to 40 / 60. Thus, the coating area of ​​the undercoat layer can be adjusted with high precision, and the resistance of the undercoat layer can be reduced.

Description

technical field [0001] The present invention relates to a method of manufacturing an electrochemical capacitor electrode, and more particularly, the present invention relates to a method of manufacturing an electrochemical capacitor electrode provided with an undercoat layer for bonding a current collector and a polarizable electrode layer. Background technique [0002] In recent years, electric double layer capacitors and other electrochemical capacitors have attracted attention as small and lightweight batteries from which relatively large capacities can be obtained. An electric double layer capacitor does not utilize chemical reactions like common secondary batteries, and is characterized by the ability to charge and discharge very quickly because it is a type of battery that stores charges directly on electrodes. [0003] By utilizing this feature, it is highly expected to use the battery, for example, as a backup power source for mobile devices (small electronic devices...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C19/04C09J11/00C09J127/12H01G9/00H01G9/04H01G11/22H01G11/24H01G11/26H01G11/28H01G11/38H01G11/42H01G11/66H01G11/86
CPCH01G11/22H01G11/28H01G11/66H01G11/74H01G11/86Y02E60/13Y02T10/70Y10T29/49115Y02P70/50H01G9/042
Inventor 桧圭宪一木刚江元和敏佐佐木武彦村上显一小山茂树岩井田学
Owner TDK CORP
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