Carbonaceous material for electric double layer capacitor and process for production thereof
US6258337A · kind A · utility
8Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Jan 14, 1999 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jan 14, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A carbonaceous electrode material for electric double layer capacitors having a large capacitor per volume, a low resistivity and a large bulk density, is provided as a carbonaceous material having a specific surface area of 800-2000 m.sup.2 /g as measured by the nitrogen adsorption BET method, and an average layer-plane spacing of at most 0.36 nm as measured by the X-ray diffraction method. The carbonaceous material is preferably produced by carbonizing and activating a carbon precursor of pitch origin in an oxidizing atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.