US4459341A
Expired / Lapsed
US
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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 18:44
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.
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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) | 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 |