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EP 1 255 261 A8 |
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CORRECTED EUROPEAN PATENT APPLICATION |
(48) |
Corrigendum issued on: |
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08.01.2003 Bulletin 2003/02 |
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Date of publication: |
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06.11.2002 Bulletin 2002/45 |
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Date of filing: 15.10.2001 |
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International Patent Classification (IPC)7: H01G 9/058 |
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Designated Contracting States: |
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AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
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Designated Extension States: |
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AL LT LV MK RO SI |
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Priority: |
16.10.2000 JP 2000315563
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Applicants: |
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- Nisshinbo Industries, Inc.
Chuo-ku, Tokyo 103-8650 (JP)
- ITOCHU CORPORATION
Chuo-ku, Osaka-shi, Osaka 541-8577 (JP)
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Inventors: |
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- Sato, Takaya, c/o Nisshinbo Industries
Chiba-shi, Chiba-ken 267-0056 (JP)
- Yoshida, Hiroshi, c/o Nisshinbo Industries
Chiba-shi, Chiba-ken 267-0056 (JP)
- Mitsuhashi, Hideto, c/o Nisshinbo Industries
Chiba-shi, Chiba-ken 267-0056 (JP)
- Minamiru, Shigenori, c/o Nisshinbo Industries
Chiba-shi, Chiba-ken 267-0056 (JP)
- Hashimoto, Zenzo
Minato-ku, Tokyo 107-0061 (JP)
- Shimizu, Tatsuo
Minato-ku, Tokyo 107-0061 (JP)
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Representative: Stuart, Ian Alexander et al |
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MEWBURN ELLIS York House 23 Kingsway London WC2B 6HP London WC2B 6HP (GB) |
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(54) |
Carbonaceous material, polarizable electrode for electrical double-layer capacitor,
and electrical double-layer capacitor |
(57) A carbonaceous material having a pore size distribution, as determined from a nitrogen
adsorption isotherm, in which pores with a radius of up to 10 Å account for at most
70% of the total pore volume, and having a specific surface area, as measured by the
nitrogen adsorption BET method, of 1-500 m
2/g is optimized for the penetration of non-aqueous electrolyte solution to the interior
thereof and the surface adsorption of ionic molecules so as to form an electrical
double layer thereon. Electrical double-layer capacitors assembled using polarizable
electrodes made with the carbonaceous material have a high voltage, a high energy
density, a high capacitance, a long cycle life, and are amenable to miniaturization.