Electrolytic solution for electrolytic capacitor

Details Electrolytic solution for electrolytic capacitor Electrolytic solution for electrolytic capacitor

1992-11-17

1994-08-16

Willis, Jr., Prince

Compositions

Electrolytes for electrical devices

429197, 429198, H01G 902, H01M 616

Patent

active

053384725

ABSTRACT:
An electrolytic solution for an electrolytic capacitor is disclosed, comprising a basic solution comprising a mixed solvent of .gamma.-butyrolactone and ethylene glycol having dissolved therein a quaternary alkylammonium salt of phthalic acid, maleic acid or benzoic acid as a solute, the basic solution further containing from 0.5 to 10 parts by weight of colloidal silica and from 0.5 to 8 parts by weight of at least one phosphorus compound selected from dialkyl phosphate and phosphorous acid, per 100 parts by weight of the basic solution. The electrolytic solution has an increased dielectric strength while retaining high conductivity.

REFERENCES:
patent: 3202611 (1965-08-01), Canty et al.
patent: 4715976 (1987-12-01), Mori et al.
patent: 4812951 (1989-03-01), Melody et al.
patent: 5141827 (1992-08-01), Fritz et al.
Maier, J. Phys. Chem. Solids, 46(3), pp. 309-320, (1985).
Dudney, Journal of the American Ceramic Society, 68(10), pp. 538-545, (1985).
Patent Abstracts of Japan, vol. 015, No. 482 (E-1142) Dec. 6, 1991 & JP-A-32 09 810 (Elna Co. Ltd) Sep. 12, 1991.

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