Method of formation and charge of the negative polarizable carbon electrode in an electric double layer capacitor
US6706079B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2002 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | May 3, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of formation and charge of a negative polarizable electrode of an electric double layer capacitor. The method can be used for manufacturing of high capacitance capacitors utilizing the energy of the electric double layer. The methods achieve hydrogen evolution on carbonaceous materials using very negative potentials. The methods provide an EDL capacitor, employing an aqueous electrolyte, with improved specific energy. The methods may also ensure the hermeticity of the capacitor. The methods include pretreating the electric double layer capacitor by keeping the negative polarizable electrode at a desired minimum potential prior to use. Desirably, the minimum potential ranges from about −0.25 to about −1.2 V vs. a reference hydrogen electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.