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US 2002/0163771 A1Published application
Electric double layer capacitor
AssigneeC and T Company, Inc.
InventorsYuri M. Volfkovich, Pavel A. Shmatko
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Abstract
The present invention is directed to a novel capacitor. The capacitor may be used in electric double layer capacitors. The capacitors include a polarizable electrode including activated carbon and a non-polarizable electrode including lead dioxide and lead sulfate. The capacitors of the present invention provide considerably higher electric capacity, higher durability, and low resistance, while maintaining high conductivity. Additionally, the electrodes may be produced more quickly and inexpensively.
Claims8
An electric double layer capacitor comprising:
- a polarizable electrode made of a carbon material, a non-polarizable electrode including lead dioxide and lead sulfate, a separator between the polarizable electrode and the non-polarizable electrode, and an aqueous solution electrolyte containing sulfuric acid,
- wherein the mass ratio of the lead sulfate to the lead dioxide ranges from about 0.1 to 99% to about 99 to 0.1%, and
- wherein the polarizable electrode also contains lead.
Dependencies are inferred from the claim text.