Patent US4459341A successfully refreshed from Google Patents.
US4459341A
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High temperature solid electrolyte fuel cell with ceramic electrodes
Assignee: United States Department of Energy
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Filing: 1983-02-02
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Granted: 1984-07-10
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Expires: 2003-02-02
Abstract
Abstract A solid oxide electrolyte fuel cell is described having a central electrolyte comprised of a HfO 2 or ZrO 2 ceramic stabilized and rendered ionically conductive by the addition of Ca, Mg, Y, La, Nd, Sm, Gd, Dy Er, or Yb. The electrolyte is sandwiched between porous electrodes of a HfO 2 or ZrO 2 ceramic stabilized by the addition of a rare earth and rendered electronically conductive by the addition of In 2 O 3 . Alternatively, the anode electrode may be made of a metal such as Co, Ni, Ir Pt, or Pd.
Inventors
- 👤 David D. Marchant
- 👤 J. Lambert Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:30
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/9025; H01M8/00; H01M8/10; H01M8/12; H01M8/124; H01M8/1246; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A high temperature solid electrolyte fuel cell comprising: (a) a porous cathode comprising a member of In 2 O 3 --RE x O y --HfO 2 /ZrO 2 electronically conducting ceramic; (b) a porous anode comprising a member of In 2 O 3 --RE x O y --HfO 2 /ZrO 2 electronically conducting ceramic or of metal; and (c) sandwiched therebetween, a solid electrolyte compromising a member of oxide stabilized HfO 2 or ZrO 2 ionically conducting ceramic; and (d) wherein the electrolyte and at least the cathode are fabricated and intimately bonded concurrently into an integral unit.
Claim 2
Dependent Claim
98 words
A high temperature solid electrolyte fuel cell comprising: (a) a porous cathode comprising a member of In 2 O 3 --RE x O y --HfO 2 /ZrO 2 electronically conducting ceramic; (b) a porous anode comprising a member of In 2 O 3 --RE x O y --HfO 2 /ZrO 2 electronically conducting ceramic or of metal; and (c) sandwiched therebetween, a solid electrolyte compromising a member of oxide stabilized HfO 2 or ZrO 2 ionically conducting ceramic; and (d) wherein the electrolyte and at least the cathode are fabricated and intimately bonded concurrently into an integral unit.
Claim 3
Dependent Claim
41 words
The fuel cell of claim 1 wherein the electronically conducting ceramic comprises from 25% to 65% In 2 O 3 , from 5% to 25% RE x O y , and from 10% to 70% HfO 2 or ZrO 2 .
Claim 4
Dependent Claim
38 words
The fuel of claim 1 wherein the ionically conducting ceramic comprises from 5% to 35% Ca, Mg, Y, La, Nd, Sm, Gd, Dy, Er, or Yb oxides and from 65% to 95% HfO 2 or ZrO 2 .
Claim 5
Dependent Claim
16 words
The fuel cell of claim 1 wherein the metal is Co, Ni, Ir, Pt, or Pd.
Claim 6
Dependent Claim
33 words
The fuel cell of claim 1 wherein the cathode, anode, and electrolyte comprise a unitary, integrally bonded cell fabricated concurrently in the same fabrication process with the electrodes intimately bonded to the electrolyte.
References Cited (Backward Citations)
US28792A
Cited
US3472697A
Cited
US3607433A
Cited
USRE28792E
Cited
US3554811A
Cited
US3578502A
Cited
US3981746A
Cited
US3558360A
Cited
US3754995A
Cited
US4130693A
Cited
US4275126A
Cited
US4292209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |