Nonaqueous electrical storage device
First Claim
1. A nonaqueous electrical storage device comprising:
- first and second high surface area electrodes in contact with a nonaqueous electrolyte;
a conductive polymer current collector in contact with each of said electrodes, said polymer current collector having a flow temperature greater than 130°
C.;
a separator, between and in contact with each of said electrodes, said separator maintaining a physical spacing in said electrolyte while allowing ionic conduction between each of said electrodes; and
a gasket sealing said storage device, said gasket comprising a thermoplastic material that is stable above 100°
C., said thermoplastic material also having a reflow temperature above 130°
C. but below a softening temperature of said conductive polymer current collector.
3 Assignments
0 Petitions
Accused Products
Abstract
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° 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° C., preferably a polyester or a polyurethane, and having a reflow temperature above 130° 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.
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Citations
8 Claims
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1. A nonaqueous electrical storage device comprising:
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first and second high surface area electrodes in contact with a nonaqueous electrolyte; a conductive polymer current collector in contact with each of said electrodes, said polymer current collector having a flow temperature greater than 130°
C.;a separator, between and in contact with each of said electrodes, said separator maintaining a physical spacing in said electrolyte while allowing ionic conduction between each of said electrodes; and a gasket sealing said storage device, said gasket comprising a thermoplastic material that is stable above 100°
C., said thermoplastic material also having a reflow temperature above 130°
C. but below a softening temperature of said conductive polymer current collector. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A nonaqueous electrical storage device comprising:
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first and second high surface area electrodes in contact with a nonaqueous electrolyte; a conductive, corrosion resistant steel current collector in contact with each of said electrodes; and a gasket sealing said storage device, said gasket comprising a thermoplastic material that is stable above 100°
C., said thermoplastic material also having a reflow temperature above 130°
C. but below a softening temperature of said current collector.
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Specification