Carbonaceous material for electric double layer capacitor, electric double layer capacitor and process for producing carbonaceous material
US8785048B2 · kind B2 · utility
1Cited by
12References
2Claims
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Key dates
| Filing date | Jun 13, 2006 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A carbonaceous material used as a polarizable active material in an electric double layer capacitor is characterized in that, when measured by an electron spin resonance method without adding any additives, the obtained peak line width is 2 mT or less, and the peak intensity, which is converted into a number of unpaired electrons per 1 g, is 1×1019 or more. A method for producing the carbonaceous material includes removing residual functional groups from the carbonaceous material so that reactions between the residual functional groups and the electrolytic liquid are suppressed when forming a capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.