Alkaline electrochemical capacitor and electrode fabrication
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United States of America Patent
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Sep 24, 2002
Grant Date -
N/A
app pub date -
Sep 6, 2000
filing date -
Aug 12, 1998
priority date (Note) -
Expired
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Abstract
A high power density alkaline electrochemical capacitor cell includes a pair of titanium nitride powder electrodes fabricated by subjecting titanium hydride powder to a controlled flow of ammonia vapor. A porous separating membrane for containing an electrolyte is attached to a first surface of the pair of powder electrodes. A conductive termination is attached to the second side of each of the powder electrodes. The electrodes have a high surface area and are electrochemically stable in strong alkaline electrolyte. The capacitor cell can be hermetically sealed and is capable of long-term cyclical operation over a wide range of operating temperatures (-55.degree. C. to +100.degree. C.) while providing high-density energy storage.
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