Electric double layer capacitor, electrolytic solution therefore and method for suppressing self-discharge in electronic component
US6621684B2 · kind B2 · utility
11Cited by
2References
36Claims
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Key dates
| Filing date | Jun 19, 2001 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Jul 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electric double layer capacitors having improved stability of electrochemical properties and improved retention of residual voltage, imparted by using an electrolytic solution containing a polymer, such as acrylonitrile/stryrene copolymer, giving an increased electrolyte ion difusion resistance are provided. The capacitors are useful for electro-storage devices, such as back-up power source for real time clocks. The polymer is useful for suppressing self discharge in electronic components, such as electric double layer capacitor, aluminum electrolytic capacitors, electro-chemical capacitor and secondary batteries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.