US5217822A
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US
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Solid oxide electrolyte type fuel cell and method for fabricating the same
Assignee: Fuji Electric Co Ltd
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Filing: 1991-09-05
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Granted: 1993-06-08
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Expires: 2011-09-05
Abstract
Abstract A solid oxide electrolyte type fuel cell includes an anode plate made of a porous sintered material composed essentially of (i) partially stabilized zirconia composed of zirconia and magnesia and (ii) nickel, and a solid oxide electrolyte element superimposed on the anode plate and composed of zirconia stabilized with yttria. The anode plate is fabricated by mixing a powder of zirconia partially stabilized with magnesia and a powder of nickel oxide, molding the mixture, sintering the mixture, and then reducing the sintered body in a reducing atmosphere, e.g., hydrogen. Magnesia is added preferably in the amount of 7 to 10% by mole. Addition of the zirconia partially stabilized with magnesia in an amount of 40 to 70% by weight based on total amount of nickel oxide plus the partially stabilized zirconia results in the coefficient of thermal expansion of the cermet matching that of the zirconia stabilized with yttria to an accuracy of ±5%.
Inventors
- 👤 Shizuyasu Yoshida
- 👤 Hitoshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9041; H01M4/905; H01M4/9066; H01M8/00; H01M8/10; H01M8/12; H01M8/124; H01M8/1246; H01M8/1253; H01M8/24; H01M8/241; H01M8/2425; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
49 words
A solid oxide electrolyte fuel cell comprising: a solid oxide electrolyte element comprising zirconia stabilized with yttria, and an anode plate having laminated thereon said solid oxide electrolyte element, said anode plate being a porous sintered body comprising (i) partially stabilized zirconia comprising zirconia and magnesia, and (ii) nickel.
Claim 2
Dependent Claim
49 words
A solid oxide electrolyte fuel cell comprising: a solid oxide electrolyte element comprising zirconia stabilized with yttria, and an anode plate having laminated thereon said solid oxide electrolyte element, said anode plate being a porous sintered body comprising (i) partially stabilized zirconia comprising zirconia and magnesia, and (ii) nickel.
Claim 3
Dependent Claim
42 words
A fuel cell as claimed in claim 1, wherein said porous sintered body contains (i) an amount of 40 to 70% by weight based on total weight of said partially stabilized zirconia; and (ii) said nickel in the form of nickel oxide.
Claim 4
Dependent Claim
24 words
A fuel cell as claimed in claim 1, wherein said partially stabilized zirconia contains magnesia in an amount of 7 to 10% by mole.
Claim 5
Dependent Claim
29 words
A fuel cell as claimed in claim 1, wherein said anode plate has a porosity of 40 to 50%, and a mean pore diameter of 6 to 10 μm.
Claim 6
Dependent Claim
31 words
A fuel cell as claimed in claim 1, wherein said anode plate has a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of said solid electrolyte element.
Claim 7
Dependent Claim
79 words
A solid oxide electrolyte fuel cell comprising: an anode plate; a solid oxide electrolyte element laminated on said anode plate; a cathode provided on said solid oxide electrolyte element; a cathode plate provided on said cathode; and a separator provided on said cathode plate; wherein said anode plate comprises a porous sintered body comprising: (i) partially stabilized zirconia comprising zirconia and magnesia; and (ii) nickel, and wherein said solid oxide electrolyte element is comprised of zirconia stabilized with yttria.
Claim 8
Dependent Claim
79 words
A solid oxide electrolyte fuel cell comprising: an anode plate; a solid oxide electrolyte element laminated on said anode plate; a cathode provided on said solid oxide electrolyte element; a cathode plate provided on said cathode; and a separator provided on said cathode plate; wherein said anode plate comprises a porous sintered body comprising: (i) partially stabilized zirconia comprising zirconia and magnesia; and (ii) nickel, and wherein said solid oxide electrolyte element is comprised of zirconia stabilized with yttria.
Claim 9
Dependent Claim
42 words
A fuel cell as claimed in claim 6, wherein said porous sintered body contains (i) an amount of 40 to 70% by weight based on total weight of said partially stabilized zirconia; and (ii) said nickel in the form of nickel oxide.
Claim 10
Dependent Claim
24 words
A fuel cell as claimed in claim 6, wherein said partially stabilized zirconia contains magnesia in an amount of 7 to 10% by mole.
Claim 11
Dependent Claim
29 words
A fuel cell as claimed in claim 6, wherein said anode plate has a porosity of 40 to 50%, and a mean pore diameter of 6 to 10 μm.
Claim 12
Dependent Claim
31 words
A fuel cell as claimed in claim 6, wherein said anode plate has a coefficient of thermal expansion substantially equal to a coefficient of thermal expansion of said solid electrolyte element.
Claim 13
Independent Claim
99 words
A method for fabricating a solid oxide electrolyte fuel cell, comprising the steps of: (a) molding a mixture of (i) partially stabilized zirconia composed of zirconia and magnesia and (ii) nickel oxide into an article in the form of an anode plate having a flat surface; (b) sintering said article to obtain a sintered body; (c) heating said sintered body in a reducing atmosphere to make an anode plate composed essentially of nickel-zirconia partially stabilized with magnesia and having a flat surface; and (d) laminating onto said anode plate a solid electrolyte element composed of zirconia stabilized with yttria.
Claim 14
Independent Claim
99 words
A method for fabricating a solid oxide electrolyte fuel cell, comprising the steps of: (a) molding a mixture of (i) partially stabilized zirconia composed of zirconia and magnesia and (ii) nickel oxide into an article in the form of an anode plate having a flat surface; (b) sintering said article to obtain a sintered body; (c) heating said sintered body in a reducing atmosphere to make an anode plate composed essentially of nickel-zirconia partially stabilized with magnesia and having a flat surface; and (d) laminating onto said anode plate a solid electrolyte element composed of zirconia stabilized with yttria.
Claim 15
Dependent Claim
23 words
A method as claimed in claim 11, wherein said solid oxide electrolyte element is laminated on said flat surface of said anode plate.
Claim 16
Dependent Claim
41 words
A method as claimed in claim 12, wherein said porous sintered body contains (i) an amount of 40 to 70% by weight based on total weight of said partially stabilized zirconia; and (ii) said nickel in the form of nickel oxide.
Claim 17
Dependent Claim
23 words
A method as claimed in claim 12, wherein said partially stabilized zirconia contains magnesia in an amount of 7 to 10% by mole.
Claim 18
Dependent Claim
33 words
A method as claimed in claim 11, wherein said solid electrolyte element is laminated on said flat surface of said anode plate prior to said heating said sintered body in a reducing atmosphere.
Claim 19
Dependent Claim
41 words
A method as claimed in claim 15, wherein said porous sintered body contains (i) an amount of 40 to 70% by weight based on total weight of said partially stabilized zirconia; and (ii) said nickel in the form of nickel oxide.
Claim 20
Dependent Claim
23 words
A method as claimed in claim 15, wherein said partially stabilized zirconia contains magnesia in an amount of 7 to 10% by mole.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |