Electrolytic capacitor and electrolyte therefor
US4812951A · kind A · utility
24Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Mar 20, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01G9/022
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrolytic capacitor includes a pair of electrodes, one of which is composed of a film-forming metal and an electrolyte comprising substantially one volume of dimethyl sulfoxide and substantially three volumes of a member of a solvent group consisting of N-ethyl-2-pyrrolidone, N-methyl pyrrolidone, butyrolactone, propylene carbonate and substituted cyanamides such as di-ally cyanamide, and mixtures thereof. Preferably the electrolyte also includes from 3 volume % to 10 volume % phosphoric or phosphorous acid and an ionogen, such as an amine salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.