Patent US5429893A successfully refreshed from Google Patents.
US5429893A
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Electrochemical capacitors having dissimilar electrodes
Assignee: Motorola Solutions Inc
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Filing: 1994-02-04
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Granted: 1995-07-04
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Expires: 2014-02-04
Abstract
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.
Inventors
- 👤 George Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:51
CPC Classifications
H; H01; H01G; H01G11/00; H01G11/02; H01G11/04; H01G11/22; H01G11/30; H01G11/32; H01G11/34; H01G11/54; H01G11/58; H01G11/62; H01M; H01M14/00; Y; Y02; Y02E; Y02E60/00; Y02E60/13
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
108 words
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.
Claim 2
Dependent Claim
108 words
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.
Claim 3
Dependent Claim
14 words
A device as defined in claim 1, wherein said electrolyte is a non-aqueous electrolyte.
Claim 4
Dependent Claim
39 words
A device as defined in claim 2, where said non-aqueous electrolyte is selected from the group of materials consisting of propylene carbonate/dimethoxyethanol/LiAsF 6 , propylene carbonate/dimethoxyethanol/(CH 3 ) 4 , ClO 4 propylene carbonate/dimethoxyethanol/LiClO 4 , and combinations thereof.
Claim 5
Dependent Claim
14 words
A device as defined in claim 1, where said electrolyte is an aqueous electrolyte.
Claim 6
Dependent Claim
49 words
A device as defined in claim 4, wherein said aqueous electrolyte is selected from the group of materials consisting of KOH/H 2 O, LiOH/H 2 O, NaClO 4 /LiOH/H 2 O, NaOH/H 2 O, H 2 SO 4 /H 2 O, HClO 4 /H 2 O, and combinations thereof.
Claim 7
Dependent Claim
105 words
A high energy density electrochemical capacitor device comprising: 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.
Claim 8
Dependent Claim
105 words
A high energy density electrochemical capacitor device comprising: 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.
Claim 9
Dependent Claim
20 words
A device as defined in claim 6 wherein said first electrode is stores charge via a double layer electrochemical mechanism.
Claim 10
Dependent Claim
34 words
A device as in claim 7 wherein said first electrode is fabricated of a carbon based material selected from a group of materials consisting of activated carbon, petroleum coke, vitreous carbon, and combinations thereof.
Claim 11
Dependent Claim
13 words
A device as in claim 6 one said electrolyte is a non-aqueous electrolyte.
Claim 12
Dependent Claim
13 words
A device as in claim 6 wherein said electrolyte is an aqueous electrolyte.
Claim 13
Dependent Claim
67 words
A high energy density electrochemical capacitor device, said capacitor device comprising: 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.
Claim 14
Dependent Claim
67 words
A high energy density electrochemical capacitor device, said capacitor device comprising: 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.
Claim 15
Dependent Claim
75 words
A device as defined in claim 11, wherein said inorganic redox electrode is fabricated of materials 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.
Claim 16
Dependent Claim
14 words
A device as defined in claim 11, wherein said electrolyte is a non-aqueous electrolyte.
Claim 17
Dependent Claim
41 words
(new) A device as defined in claim 13, wherein said non-aqueous electrolyte is selected from the group of materials consisting of propylene carbonate/dimethoxyethanol/LiAsF 6 , propylene carbonate/dimethoxyethanol/(CH 3 ) 4 , ClO 4 , propylene carbonate/dimethoxyethanol/LiClO 4 , and combinations thereof.
Claim 18
Dependent Claim
14 words
A device as defined in claim 11, wherein said electrolyte is an aqueous electrolyte.
Claim 19
Dependent Claim
49 words
A device as defined in claim 15 wherein said aqueous electrolyte is selected from the group of materials consisting of KOH/H 2 O, LiOH/H 2 O, NaClO 4 /LiOH/H 2 O, NaOH/H 2 O, H 2 SO 4 /H 2 O, HClO 4 /H 2 O, and combinations thereof.
References Cited (Backward Citations)
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