Production process of active carbon used for electrode for organic solvent type electric double layer capacitor
US5891822A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a process for producing active carbon suitable for use in electrodes for an organic solvent type electric double layer capacitor, comprising calcining an easily graphitizable organic substance and then subjecting the resultant carbonized product to an alkali activation treatment, wherein the alkali activation treatment comprises a first alkali activation treatment at a temperature within a first range and a second alkali activation treatment at a temperature within a second range, said temperature within the second range being higher than that of the first activation treatment, and one of both alkali activation treatments is performed after the other alkali activation treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.