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US4146458A
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Electrochemical device having an oxygen electrode containing a pyrochlore type compound electrocatalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-12-02
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Granted: 1979-03-27
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Expires: 1997-12-02
Abstract
Abstract An electrochemical device is described which has an oxygen electrode which contains a pyrochlore type electrocatalyst material. This electrocatalyst material is one or more electrically conductive pyrochlore compounds selected from the compounds of the following formula:
Inventors
- 👤 Harold S. Horowitz
- 👤 John M. Longo
- 👤 Joel I. Haberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:22
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25C; C25C7/00; C25C7/02; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
103 words
In an electrochemical device having an oxygen electrode containing an electrocatalyst material, the improvement comprising using as said electrocatalyst material one or more compounds selected from the group consisting of those compounds having the following formula: A.sub.2 B.sub.2 O.sub.7-y wherein A is any of the pyrochlore structure metal cations, wherein B is a pyrochlore structure metal cation at least a major portion of which is selected from the group consisting of one or more of Ru, Rh, Ir, Os, Pt, Ru-Pb mixtures and Ir-Pb mixtures and wherein y is greater than or equal to zero and is less than or equal to 1.0.
Claim 2
Dependent Claim
103 words
In an electrochemical device having an oxygen electrode containing an electrocatalyst material, the improvement comprising using as said electrocatalyst material one or more compounds selected from the group consisting of those compounds having the following formula: A.sub.2 B.sub.2 O.sub.7-y wherein A is any of the pyrochlore structure metal cations, wherein B is a pyrochlore structure metal cation at least a major portion of which is selected from the group consisting of one or more of Ru, Rh, Ir, Os, Pt, Ru-Pb mixtures and Ir-Pb mixtures and wherein y is greater than or equal to zero and is less than or equal to 1.0.
Claim 3
Dependent Claim
36 words
The electrochemical device of claim 1 wherein A is a pyrochlore structure metal cation at least a major portion of which is selected from the group consisting of one or more of Pb, Bi and Tl.
Claim 4
Dependent Claim
40 words
The electrochemical device of claim 2 wherein B is a pyrochlore structure metal cation at least a major portion of which is selected from a group consisting of one or more of Ru, Rh, Ir, Ru-Pb mixtures and Ir-Pb mixtures.
Claim 5
Dependent Claim
13 words
The elctrochemical device of claim 3 wherein said device is a fuel cell.
Claim 6
Dependent Claim
13 words
The electrochemical device of claim 3 wherein said device is a metal-air battery.
Claim 7
Dependent Claim
12 words
The electrochemical device of claim 3 wherein said device is an electrolyzer.
Claim 8
Dependent Claim
14 words
The electrochemical device of claim 3 wherein said device is a metal electrowinning device.
Claim 9
Dependent Claim
13 words
The electrochemical device of claim 2 wherein said device is a fuel cell.
Claim 10
Dependent Claim
13 words
The electrochemical device of claim 2 wherein said device is a metal-air battery.
Claim 11
Dependent Claim
12 words
The electrochemical device of claim 2 wherein said device is an electrolyzer.
Claim 12
Dependent Claim
14 words
The electrochemical device of claim 2 wherein said device is a metal electrowinning device.
Claim 13
Dependent Claim
13 words
The electrochemical device of claim 1 wherein said device is a fuel cell.
Claim 14
Dependent Claim
13 words
The electrochemical device of claim 1 wherein said device is a metal-air battery.
Claim 15
Dependent Claim
12 words
The electrochemical device of claim 1 wherein said device is an electrolyzer.
Claim 16
Dependent Claim
14 words
The electrochemical device of claim 1 wherein said device is a metal electrowinning device.
Claim 17
Dependent Claim
39 words
The electrochemical device of claim 1 wherein A is selected from the group consisting of Pb, Bi and Tl, and wherein B is selected from the group consisting of Ru, Rh, Ir, Os, Pt, Ru-Pb mixtures and Ir-Pb mixtures.
Claim 18
Dependent Claim
13 words
The electrochemical device of claim 16 wherein said device is a fuel cell.
Claim 19
Dependent Claim
13 words
The electrochemical device of claim 16 wherein said device is a metal-air battery.
Claim 20
Dependent Claim
12 words
The electrochemical device of claim 16 wherein said device is an electrolyzer.
Claim 21
Dependent Claim
14 words
The electrochemical device of claim 16 wherein said device is a metal electrowinning device.
Claim 22
Dependent Claim
74 words
The electrochemical device of claim 1 wherein said electrocatalyst material is one or more compounds selected from the group consisting of those compounds having the formula: Pb.sub.2 [M.sub.2-x Pb.sub.x ]O.sub.7-y wherein M is selected from the group consisting of Ru, Ir and mixtures thereof, x is greater than zero and less than or equal to about 1.2, and y is greater than or equal to zero and less than or equal to about 1.0.
Claim 23
Dependent Claim
13 words
The electrochemical device of claim 21 wherein said device is a fuel cell.
Claim 24
Dependent Claim
13 words
The electrochemical device of claim 21 wherein said device is a metal-air battery.
Claim 25
Dependent Claim
12 words
The electrochemical device of claim 21 wherein said device is an electrolyzer.
Claim 26
Dependent Claim
14 words
The electrochemical device of claim 21 wherein said device is a metal electrowinning device.
Claim 27
Dependent Claim
18 words
The electrochemical device of claim 21 wherein x is within the range of about 0.1 to about 1.0.
Claim 28
Dependent Claim
10 words
The electrochemical device of claim 21 wherein M is ruthenium.
Claim 29
Dependent Claim
10 words
The electrochemical device of claim 21 wherein M is iridium.
Claim 30
Dependent Claim
18 words
The electrochemical device of claim 21 wherein x is within the range of about 0.25 to about 0.8.
Claim 31
Dependent Claim
13 words
The electrochemical device of claim 21 wherein said device is a fuel cell.
Claim 32
Dependent Claim
13 words
The electrochemical device of claim 21 wherein said device is a metal-air battery.
Claim 33
Dependent Claim
12 words
The electrochemical device of claim 21 wherein said device is an electrolyzer.
Claim 34
Dependent Claim
14 words
The electrochemical device of claim 21 wherein said device is a metal electrowinning device.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |