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Electrode film for electric double-layer capacitor and production method therefor

An electric double layer capacitor and electrode film technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of sheet electrode destruction, sheet electrode powder drop, and changes.

Active Publication Date: 2015-01-07
NIPPON VALQUA IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when using this technology, it may cause damage to the chip electrode, powder drop of the chip electrode, and change in shape (thickness, density, etc.), which will cause the electrical stability of the chip electrode and the EDLC using the chip electrode damaged

Method used

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  • Electrode film for electric double-layer capacitor and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0116] Active carbon (YP50F manufactured by Kuraray Chemical Co., Ltd.), conductive carbon (Ketchen blackECP600JD manufactured by Lion Corporation) and PTFE (Polyflon D-1E manufactured by Daikin Industries, Ltd.) were calculated according to the weight of activated carbon: conductive carbon: PTFE = 88:6:6 The ratio is measured so that the total amount is 1.5 kg.

[0117] 370 parts by weight of ion-exchanged water was mixed with a total of 100 parts by weight of these activated carbons, conductive carbons, and PTFE, and stirred at a low speed (140 rpm) for 30 seconds to obtain a kneaded product.

[0118] Then, these kneaded products were rolled once with a calender roll at a roll speed of 1 m / min to a thickness of 520 to 530 μm. Secondary rolling was then performed at a roll speed of 2 m / min to obtain an electrode film with a thickness of 500 μm.

[0119] Table 1 shows the evaluation results of this electrode film.

[0120] In addition, since the electrode film is manufactured ...

Embodiment 2

[0122] Except that the roll speed of the primary rolling was changed from 1 m / min to 0.8 m / min, and the secondary rolling was not performed, the same operation as in Example 1 was performed to obtain an electrode film with a thickness of 500 μm.

[0123] Table 1 shows the evaluation results of this electrode film.

Embodiment 3

[0128] An electrode film was obtained in the same manner as in Comparative Example 1, and then the surface of the electrode film was subjected to plasma treatment under the following conditions to obtain an electrode film.

[0129] (Plasma treatment conditions)

[0130] Gas type: He, gas flow rate: 3L / min, plasma frequency: 5kHz, output: 120W, irradiation time: 300 seconds

[0131] Table 1 shows the evaluation results of this electrode film.

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Abstract

[Problem] To provide an electrode film for an electric double-layer capacitor having high electrolyte impregnation while including a similar amount of fluororesin to conventional products. [Solution] An electrode film for an electric double-layer capacitor including activated carbon and a fluororesin binder, characterized by fulfilling A / B<=7.0 in at least one surface thereof (wherein A is the proportion of fluorine atoms to the total number of fluorine atoms and carbon atoms in the surface of the electrode film as measured using Electron Spectroscopy for Chemical Analysis (ESCA) and B is the proportion of fluorine atoms to the total number of fluorine atoms and carbon atoms contained in the electrode film.)

Description

technical field [0001] The invention relates to an electrode film for an electric double layer capacitor and a manufacturing method thereof. Background technique [0002] Electrode films for electric double layer capacitors (hereinafter also referred to as "EDLC") are generally composed of powdery electrodes such as activated carbon, conductive materials, and binders such as fluororesins (see Japanese Patent Application Laid-Open No. 2004-2105 (Patent Document 1) etc). [0003] The performance of the EDLC is affected by the amount of impregnation of the electrode membrane with the electrolyte. Japanese Patent Publication No. 4-47449 (Patent Document 2) discloses the following technology: that is, in order to improve the electrolyte impregnability of the sheet electrode, the surface of the sheet electrode, especially for the surface containing a large amount of polytetrafluoroethylene (hereinafter Also known as "PTFE"), the dense and smooth layer is destroyed, and scars are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/22
CPCH01G11/86Y02E60/13H01G11/38
Inventor 能势正章仁田尾晶雅
Owner NIPPON VALQUA IND LTD
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