Electrolyte for electrolytic capacitor and electrolytic capacito

Details Electrolyte for electrolytic capacitor and electrolytic capacito Electrolyte for electrolytic capacitor and electrolytic capacito

1998-12-17

2000-12-26

Kincaid, Kristine

Electricity: electrical systems and devices

Electrolytic systems or devices

Liquid electrolytic capacitor

361509, 361516, 252 622, H01G 902, H01M 604

Patent

active

061668990

ABSTRACT:
And electrolytic capacitor having excellent high temperature life characteristics and excellent low temperature properties, an aluminum electrolytic capacitor having excellent high temperature life characteristics and moisture resistance, a low dielectric loss and good low temperature properties, and an electrolyte therefor. A first electrolyte which includes a mixed solvent of sulfolane and at least one 3-methyl sulfolane and 2,4-dimethyl sulfolane, a second electrolyte in which a quaternized imidazolinium salt or a quaternized pyrimidinium salt is dissolved in a mixed solvent containing sulfolane and .gamma.-butyrolactone, and a third electrolyte which includes a mixed solvent containing .gamma.-butyrolactone and at least two of sulfolane, 3-methyl sulfolane and 2,4-dimethyl sulfolane and a quaternized imidazolinium salt or a quaternized pyrimidinium. An aluminum electrolytic capacitor constructed by winding, via a separator, an anodic electrode foil provided with an anode leading means and a cathodic electrode foil provided with a cathode leading means made of aluminum to thereby form a capacitor device, and then impregnating the capacitor device with each of the above-specified electrolytes.

REFERENCES:
patent: 4151581 (1979-04-01), Bernard et al.
patent: 4715976 (1987-12-01), Mori et al.
patent: 4821153 (1989-04-01), Kuwae et al.
patent: 5616274 (1997-04-01), Kanabara et al.
patent: 5754394 (1998-05-01), Evans et al.
patent: 5827602 (1998-10-01), Koch et al.

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