Nonaqueous Electrical Storage Device

Patent · Tue Oct 26 00:00:00 EDT 1999

OSTI ID:879445

McEwen, Alan B ^[1]; Evans, David A ^[2]; Blakley, Thomas J ^[3]; Goldman, Jay L ^[4]

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1. Melrose, MA
2. Seekonk, MA
3. Woburn, MA
4. Mansfield, MA

An electrochemical capacitor is disclosed that features two, separated, high surface area carbon cloth electrodes sandwiched between two current collectors fabricated of a conductive polymer having a flow temperature greater than 130.degree. C., the perimeter of the electrochemical capacitor being sealed with a high temperature gasket to form a single cell device. The gasket material is a thermoplastic stable at temperatures greater than 100.degree. C., preferably a polyester or a polyurethane, and having a reflow temperature above 130.degree. C. but below the softening temperature of the current collector material. The capacitor packaging has good mechanical integrity over a wide temperature range, contributes little to the device equivalent series resistance (ESR), and is stable at high potentials. In addition, the packaging is designed to be easily manufacturable by assembly line methods. The individual cells can be stacked in parallel or series configuration to reach the desired device voltage and capacitance.

• Research Organization: Covalent Associates, Inc. (Woburn, MA)
• DOE Contract Number: FG02-96ER82149
• Assignee: Covalent Associates, Inc. (Woburn, MA)
• Patent Number(s): US 5,973,913
• Application Number: 08/910146
• OSTI ID: 879445
• Country of Publication: United States
• Language: English