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Polarizable electrode, capacitor using same, and method for manufacturing polarizable electrode

A polarized electrode and conductive agent technology, applied in the field of capacitors, can solve the problem of large surface area of ​​activated carbon

Inactive Publication Date: 2008-03-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in order to make the polarizable electrode layer thinner, activated carbon with small particle size must be used, but such activated carbon has a large surface area

Method used

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  • Polarizable electrode, capacitor using same, and method for manufacturing polarizable electrode
  • Polarizable electrode, capacitor using same, and method for manufacturing polarizable electrode
  • Polarizable electrode, capacitor using same, and method for manufacturing polarizable electrode

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Embodiment Construction

[0036] FIG. 1 is a partially cutaway perspective view of a capacitor according to an embodiment of the present invention, and FIG. 2 is a conceptual configuration diagram of the capacitor. Fig. 3 is a diagram showing a method of fabricating a polarizable electrode. This capacitor has: first and second polarizable electrodes (hereinafter referred to as electrodes) 3A, 3B; a diaphragm 5 interposed between the electrodes 3A, 3B; Electrolyte 6 inside 4.

[0037] Lead wires 7 are connected to the electrodes 3A and 3B, respectively. Electrolytic solution 6 is filled between electrodes 3A, 3B and separator 5 . Electrodes 3A, 3B are wound through separator 5 . The sealing material 8 seals the opening of the case 4 . Through holes are provided in the sealing material 8 so that the lead wires 7 are exposed to the outside. The casing 4 is made of aluminum, for example.

[0038] The electrode 3A has a first current collector (hereinafter referred to as a current collector) 1A and a ...

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Abstract

A polarizable electrode includes a collector and a polarizable electrode layer having a thickness of 5 µm or more to 130 µm or less on the surface of the collector. The polarizable electrode layer includes a first binder composed of at least one of an ammonium salt of carboxymethyl cellulose, polyvinylpyrrolidone, polyvinyl alcohol, methylcellulose, and a hydroxylpropyl cellulose resin, and a second binder composed of at least one of a latex, a fluoride-based polymer, a urethane resin, and an olefin-based resin. The content of the first binder is 5% by weight or less with respect to the total weight of the solid part, and the content of the second binder is 1% by weight or more and 5% by weight or less.

Description

technical field [0001] The present invention relates to a polarizable electrode, a capacitor using the polarizable electrode, and a method for manufacturing the polarizable electrode. Background technique [0002] A conventional polarizable electrode has a current collector and a polarizable electrode layer provided on the surface of the current collector. The polarizable electrode layer at least includes activated carbon, a conductive agent (Conductive agent) and two binders. Such polarizable electrodes are disclosed in, for example, Japanese Patent Laid-Open No. 11-102844, Japanese Patent Laid-Open No. 2000-12404, and Japanese Patent Laid-Open No. 2001-307965. [0003] Capacitors using polarizable electrodes are required to have high capacitance and to reduce DC resistance at low temperatures. That is, since the diffusion rate of ions in a binder layer such as carboxymethyl cellulose is slow in a polarizable electrode at a low temperature, the DC resistance is high. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/058H01G11/22H01G11/24H01G11/38H01G11/42H01G11/86
CPCH01G9/042Y02T10/7022Y02E60/13H01G11/38H01G9/151H01G11/28H01G9/058Y10T428/264Y10T428/25Y10T428/26Y10T428/265Y10T428/263Y02T10/70
Inventor 今村敬亮山田千穗坂田基浩
Owner PANASONIC CORP
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