Electrochemical capacitors having dissimilar electrodes
First Claim
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1. A high energy density, electrochemical capacitor device, said capacitor device comprising:
- a first electrode fabricated of a carbon-based material, and said electrode stores charge via a double layer electrochemical mechanism;
a second electrode fabricated of an inorganic redox material selected from the group of materials consisting of Ru, Rh, Pd, Os, Ir, Co, Ni, Mn, Fe, Pt, Ru alloys, Rh alloys, Pd alloys, Os alloys, Ir alloys, Co alloys, Ni alloys, Fe alloys, Pt alloys, Ru oxides, Rh oxides, Pd oxides, Os oxides, Ir oxides, Co oxides, Ni oxides, Mn oxides, Fe oxides, Pt oxides, and combinations thereof; and
an electrolyte disposed between said first and second electrodes.
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Abstract
The invention provides for an improved pseudocapacitive device (10) having dissimilar electrodes (20) and (40). The first electrode (20) stores electrochemical charge via a double layer electrochemical mechanism, while the second electrode stores electrochemical charge via an oxidation/reduction reaction.
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Citations
16 Claims
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1. A high energy density, electrochemical capacitor device, said capacitor device comprising:
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a first electrode fabricated of a carbon-based material, and said electrode stores charge via a double layer electrochemical mechanism; a second electrode fabricated of an inorganic redox material selected from the group of materials consisting of Ru, Rh, Pd, Os, Ir, Co, Ni, Mn, Fe, Pt, Ru alloys, Rh alloys, Pd alloys, Os alloys, Ir alloys, Co alloys, Ni alloys, Fe alloys, Pt alloys, Ru oxides, Rh oxides, Pd oxides, Os oxides, Ir oxides, Co oxides, Ni oxides, Mn oxides, Fe oxides, Pt oxides, and combinations thereof; and an electrolyte disposed between said first and second electrodes. - View Dependent Claims (2, 3, 4, 5)
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6. A high energy density electrochemical capacitor device comprising:
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first and second electrodes formed of dissimilar materials, and characterized by different charge storage mechanisms, wherein said second electrode is fabricated of an inorganic redox material selected from the group of materials consisting of Ru, Rh, Pd, Os, Ir, Co, Ni, Mn, Fe, Pt, Ru alloys. Rh alloys, Pd alloys Os alloys, Ir alloys, Co alloys, Ni alloys, Fe alloys, Pd alloys, Ru oxides, Rh oxides, Pd oxides. Os oxides, Ir oxides, Co oxides, Ni oxide, Mn oxides, Fe oxides, Pt oxides, and combinations thereof; and an electrolyte material disposed between said electrodes to facilitate charge transfer. - View Dependent Claims (7, 8, 9, 10)
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11. A high energy density electrochemical capacitor device, said capacitor device comprising:
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a first electrode fabricated of a carbon base material selected from the group of materials consisting of activated carbon, petroleum coke, vitreous carbon, and combinations thereof, and said electrode stores charge via a double layer electrochemical mechanism; a second electrode fabricated of an inorganic redox material; and an electrolyte disposed between said first and second electrodes. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification