Process of producing activated carbon for electric double layer capacitor electrode
US8284540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2008 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Sep 30, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a process of producing an activated carbon for an electric double layer capacitor, which can produce easily and inexpensively an activated carbon free from fusing of carbon particles during activation and having a small diameter, a uniform particle diameter, and a relatively large specific surface area on a commercial scale. The process comprises the steps of calcining an easily graphitizable carbon material so that the reduction rates of the hydrogen/carbon atomic ratio (H/C) and the volatile components in the carbon material are 4 percent or more and 5 percent or more, respectively after calcination and activating the carbon material thereby producing an activated carbon for an electric double layer capacitor, having an average particle diameter of 0.5 to 7 μm and a BET specific surface area of 1500 to 3000 m2/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.