Electricity: electrical systems and devices – Electrolytic systems or devices – Liquid electrolytic capacitor
Reexamination Certificate
1999-08-27
2001-04-17
Dinkins, Anthony (Department: 2831)
Electricity: electrical systems and devices
Electrolytic systems or devices
Liquid electrolytic capacitor
C361S504000
Reexamination Certificate
active
06219222
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention generally relates to the conversion of chemical energy to electrical energy and, more particularly, to an electrolyte solution having high conductivity and high breakdown voltage.
SUMMARY OF THE INVENTION
The present invention relates to an electrolyte suitable for activating an electrolytic or electrochemical capacitor. The electrolyte has a solvent which includes water and ethylene glycol having an ammonium salt dissolved therein. An acid or acids is used as an additive to achieve the appropriate pH, conductivity, and breakdown voltage for a particular capacitor application.
An exemplary capacitor includes an anode of a base metal such as aluminum or tantalum provided with an oxidized surface. The oxidized anode surface is a dielectric layer typically formed by an anodizing process. The thusly formed anode is electrochemically associated with a cathode having a separator disposed there between and activated with the present electrolyte. The electrolyte has a relatively high conductivity and breakdown voltage, which ensures that the capacitor exhibits low series resistance.
REFERENCES:
patent: 561204 (1896-06-01), Curtis
patent: 4715976 (1987-12-01), Mori et al.
patent: 4762630 (1988-08-01), Shinozaki
patent: 4830785 (1989-05-01), Shinozaki et al.
patent: 5338472 (1994-08-01), Yokoyama et al.
patent: 5496481 (1996-03-01), Liu
patent: 5507966 (1996-04-01), Liu
patent: 5686203 (1997-11-01), Idota et al.
Miller Lauren
Muffoletto Barry C.
Scheuer Christina
Shah Ashish
Dinkins Anthony
Hodgson Russ Andrews Woods & Goodyear LLP
Wilson Greatbatch Ltd.
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