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Method of manufacturing electrode for electrochemical capacitor and apparatus for manufacturing the same

A manufacturing method and capacitor technology, which are applied in the manufacture of capacitors, capacitor electrodes, and hybrid/electric double-layer capacitors, etc., can solve problems such as bumping, difficulty in drying, and difficulty in solvent drying, so as to prevent movement and achieve good quality. Effect

Active Publication Date: 2007-07-04
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this method, drying can be carried out relatively efficiently, but since infrared irradiation is performed in a state where the coating film contains a lot of solvent, there is a problem that bumping is likely to occur as in Japanese Patent Laid-Open No. 2001-307716
Moreover, unlike secondary batteries and the like, the material constituting the polarized electrode layer, such as an electric double layer capacitor, contains porous particles, and when there are countless pores, the drying of the solvent is more difficult, and it is difficult not to cause bump drying

Method used

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  • Method of manufacturing electrode for electrochemical capacitor and apparatus for manufacturing the same
  • Method of manufacturing electrode for electrochemical capacitor and apparatus for manufacturing the same
  • Method of manufacturing electrode for electrochemical capacitor and apparatus for manufacturing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0113] 90 parts by weight of granular activated carbon (manufactured by KURARAY Corporation, trade name: RP-20) used as the porous body particles used in the coating liquid, acetylene black (manufactured by Denki Kogyo Co., Ltd., trade name: Denka Black) as a conductive auxiliary agent ) 1 part by weight, mixed for 15 minutes with a planetary disperser (Planetary dispersion). 9 parts by weight of polyvinylidene fluoride (PVDF) as a binder and 100 parts by weight of NMP (n-methyl-2-pyrrolidone) as a solvent were added to the total amount of the mixture (solid content concentration: about 50%) , and stirred for 45 minutes with a planetary disperser. Furthermore, 140 parts by weight of NMP (n-methyl-2-pyrrolidone) (solid content concentration: about 30%) was added as a solvent to this mixture, and it stirred for 4 more hours, and it adjusted to the coating liquid.

[0114] Then, the adjusted coating solution was coated on aluminum platinum (thickness 40 μm) as a current collecto...

Embodiment 2

[0118] The electrode sheet sample of Example 2 was produced in the same manner as in Example 1 except that the time for infrared drying was set to 3 hours. The residual amount of the solvent was measured for the electrode sheet sample of Example 2, and the value immediately after coating was 0.1% when it was 100%, which was an extremely good value.

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Abstract

The invention relates to a method of manufacturing electrode for electrochemical capacitor and apparatus for manufacturing electrode for electrochemical capacitor. The apparatus comprises a coating portion which forms, on a collector, a coated film comprising porous particles, a binder which binds the porous particles, and a solvent which dissolves the binder, a hot-air drying portion which forms a polarizable electrode layer by hot-air drying of the coated film, and an infrared ray drying portion which performs infrared ray drying of the polarizable electrode layer. By this means, solvent remaining after hot-air drying can be efficiently removed. Hence hot-air drying can be performed gently, and as a result, binder movement and similar can be prevented. Moreover, because infrared ray irradiation is performed in a state in which drying has been performed to some extent, bumping of solvent does not occur.

Description

technical field [0001] The present invention relates to a method for manufacturing an electrode for an electrochemical capacitor and a device for manufacturing an electrode for an electrochemical capacitor, in particular to a method for manufacturing an electrode for an electrochemical capacitor formed by coating a polarized electrode layer containing porous particles And a manufacturing device for electrodes for electrochemical capacitors. Background technique [0002] In recent years, electrochemical capacitors such as electric double layer capacitors have attracted attention as small, lightweight batteries with relatively large capacity. Since electric double layer capacitors do not utilize chemical reactions like ordinary secondary batteries, but store charges directly to the electrodes, they have the feature of being able to charge and discharge extremely quickly. Utilizing this feature, it is expected to be used as a backup power source for portable devices (small ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/058H01G13/00H01M4/04H01G11/22H01G11/24H01G11/38H01G11/42H01G11/86
CPCH01G11/86Y02T10/7022Y02E60/13H01G11/38H01G11/42H01G9/058H01G11/28Y02T10/70
Inventor 田中英树片井一夫
Owner TDK CORPARATION