Electrolytic solution for use in electrolytic capacitor and electrolytic capacitor
US6285543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2000 |
| Grant date | Sep 4, 2001 |
| Priority date | — |
| Expiry date | Apr 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrolytic solution for use in an electrolytic capacitor, having a solution containing a solvent consisting of 20 to 80% by weight of an organic solvent and 80 to 20% by weight of water, and at least one electrolyte selected from a carboxylic acid or a salt thereof and an inorganic acid or a salt thereof, having added thereto at least on nitro compound selected from nitrophenol, nitrobenzoic acid, dinitrobenzoic acid, nitroacetophenone and nitroanisole. The electrolytic solution has a low impedance and excellent low-temperature stability, along with good working life characteristics, and it can also exhibit an excellent hydrogen gas absorption function when an electrolytic solution contains a highly increased amount of water in its mixed solvent or when an electrolytic capacitor is used under high temperature conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.