Electrode, electrochemical device, and method of making electrode

Inactive Publication Date: 2005-11-03
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0029] The present invention can provide an electrode which can sufficiently reduce the contact resistance between a particle conta

Problems solved by technology

When such an electrode is used in an electrochemical device, the internal resistance of the electrochemical device becomes higher, whereby the electrochemical device may be obstructed from achieving higher output or higher energ

Method used

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  • Electrode, electrochemical device, and method of making electrode
  • Electrode, electrochemical device, and method of making electrode
  • Electrode, electrochemical device, and method of making electrode

Examples

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examples

[0136] In the following, the present invention will be explained in more detail with reference to examples and a comparative example, which do not restrict the present invention at all.

example a1

[0137] First, electrodes for an electric double layer capacitor were made.

[0138] (1) Making of Composite Particles

[0139] To begin with, composite particles 250 for use in the manufacturing of active material containing layers in electrodes for the electric double layer capacitor were made by the following procedure. Here, the composite particles 250 were constituted by a cathode / anode active material (90 mass %), conductive auxiliary agent particles (5 mass %), and a binder (5 mass %).

[0140] As the cathode and the anode active material particles containing the active material), activated carbon (having an average particle size of 15 μm) was used. As the conductive auxiliary agent particles, carbon black (acetylene black) was used As the binder, polyvinylidene fluoride PVDF) was used

[0141] First, a “material liquid” (containing 3 mass % of carbon black and 2 mass % of polyvinylidene fluoride) in which carbon black was dispersed in a solution in which polyvinylidene fluoride had b...

examples a2

and A3

[0149] Examples A2 and A3 were the same as Example A1 except that the roller line pressure was 200×102 N / m and 2000×102 N / m, respectively.

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Abstract

An electrode comprises a planar collector, and an active material containing layer disposed on the collector. The active material containing layer comprises a plurality of particles containing an active material, and a binder for binding the particles containing the active material to each other and the particles containing the active material to the collector. The collector has a surface depressed in conformity to a form of the particles containing the active material.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an electrode usable in electrochemical devices such as primary batteries, secondary batteries (lithium-ion secondary batteries in particular), electrolytic cells, and capacitors (electrochemical capacitors in particular), an electrochemical device equipped therewith, and a method of manufacturing an electrode. [0003] 2. Related Background Art [0004] Electrochemical devices such as high-energy batteries typified by lithium ion secondary batteries and electrochemical capacitors typified by electric double layer capacitors have widely been in use in portable devices and the like. Such an electrochemical device mainly comprises a pair of electrodes and an electrolyte (e.g., a liquid electrolyte or solid electrolyte) interposed between the electrodes. [0005] In general, such an electrode of the electrochemical device comprises an active material containing layer stacked on a planar collec...

Claims

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Application Information

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IPC IPC(8): C25D17/10H01G9/042H01G9/058H01M4/02H01M4/04H01M4/139H01M4/70H01M10/0525H01M10/36
CPCH01G9/042H01G11/38H01G11/42H01M4/0435H01M4/0471H01M4/139Y10T29/49002H01M10/0525H01M2004/021Y02E60/122H01G11/28Y02E60/13H01M4/70Y02E60/10
Inventor SUZUKI, TADASHISUZUKI, HISASHIKURIHARA, MASATOMARUYAMA, SATOSHI
Owner TDK CORPARATION
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