Patent US4708917A successfully refreshed from Google Patents.
US4708917A
Expired / Lapsed
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Molten carbonate cathodes and method of fabricating
Assignee: UTC Power Corp
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Filing: 1985-12-23
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Granted: 1987-11-24
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Expires: 2005-12-23
Abstract
Abstract Molten carbonate fuel cell cathodes formed from a composition comprising oxides of nickel, lithium salts and barium salts having improved strength. These cathodes are fabricated by prefiring oxides of nickel and optionally lithium salts. The prefired powder is optionally leached with an organic acid and optional barium salts may be added. These powders are formed into an electrode and sintered. The resulting electrodes have improved strength.
Inventors
- 👤 Thomas E. Swarr
- 👤 John C. Trocciola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:15
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/02; H01M4/24; H01M4/32; H01M4/8605; H01M4/8621; H01M2004/8678; H01M2004/8689; H01M8/00; H01M8/14; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
A molten carbonate fuel cell comprising an anode, a cathode and electrolyte matrix wherein the improvement comprises said cathode formed from a composition comprising: (a) oxides of nickel; (b) lithium salts; (c) barium salts; and (d) said cathode having a substantially uniform composition throughout; wherein the cathode has improved strength.
Claim 2
Dependent Claim
50 words
A molten carbonate fuel cell comprising an anode, a cathode and electrolyte matrix wherein the improvement comprises said cathode formed from a composition comprising: (a) oxides of nickel; (b) lithium salts; (c) barium salts; and (d) said cathode having a substantially uniform composition throughout; wherein the cathode has improved strength.
Claim 3
Dependent Claim
19 words
The molten carbonate fuel cell of claim 1 wherein the composition comprises at least about 90% oxides of nickel.
Claim 4
Dependent Claim
19 words
The molten carbonate fuel cell of claim 1 wherein the composition comprises about 1% to about 10% lithium salts.
Claim 5
Dependent Claim
19 words
The molten carbonate fuel cell of claim 1 wherein the composition comprises about 3% to about 10% barium salts.
Claim 6
Dependent Claim
20 words
The molten carbonate fuel cell of claim 1 wherein the cathode has porosity of about 20% to about 60% .
Claim 7
Dependent Claim
22 words
The molten carbonate fuel cell of claim 1 wherein said composition consists essentially of oxides of nickel, lithium salts, and barium salts.
Claim 8
Dependent Claim
34 words
The molten carbonate fuel cell of claim 1 wherein the composition comprises at least about 90% oxides of nickles, about 1% to about 10% lithium salts, and about 3% to about 10% barium salts.
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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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |