Patent US4902587A successfully refreshed from Google Patents.
US4902587A
Expired / Lapsed
US
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Fuel cell
Assignee: Hitachi Ltd
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Filing: 1989-01-11
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Granted: 1990-02-20
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Expires: 2009-01-11
Abstract
Abstract The present invention provides a fuel cell which is improved in creep resistance and sintering resistance of anode and in activity of anode and which can maintain high performance over a long time. This fuel cell comprises a laminate comprising an electrolyte holding material having pores for holding an electrolyte, an anode and a cathode which sandwich the electrolyte holding material and a separator provided with grooves for feeding a gas to the anode and cathode characterized in that the anode is a ternary anode which comprises nickel as a main component and additionally cobalt and chromium oxide.
Inventors
- 👤 Toshihiro Saitoh
- 👤 Keizou Ohtsuka
- 👤 Shuhei Yamaguchi
- 👤 Toshiki Kahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:20
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/14; H01M8/141; H01M8/142; H01M4/00; H01M4/86; H01M4/8605; H01M4/8621; H01M2004/8678; H01M2004/8684; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A fuel cell which comprises a laminate comprising an electrolyte holding material having pores for holding an electrolyte, an anode and a cathode provided to sandwich said electrolyte holding material and a separator provided with grooves for feeding a gas to said anode and cathode wherein said anode is a ternary anode which comprises nickel as a main component and additionally cobalt and chromium oxide.
Claim 2
Dependent Claim
65 words
A fuel cell which comprises a laminate comprising an electrolyte holding material having pores for holding an electrolyte, an anode and a cathode provided to sandwich said electrolyte holding material and a separator provided with grooves for feeding a gas to said anode and cathode wherein said anode is a ternary anode which comprises nickel as a main component and additionally cobalt and chromium oxide.
Claim 3
Dependent Claim
19 words
A fuel cell according to claim 1 wherein the amount of cobalt is 3-20 atom % based on nickel.
Claim 4
Dependent Claim
25 words
A fuel cell according to claim 1 wherein the amount of chromium oxide is 3-20 atom % in terms of metallic chromium based on nickel.
Claim 5
Dependent Claim
27 words
A fuel cell according to claim 1 wherein the ternary anode is prepared by mixing nickel, chromium oxide and cobalt powders and heating and sintering the mixture.
Claim 6
Dependent Claim
36 words
A fuel cell according to claim 1 wherein the ternary anode is prepared by mixing nickel and chromium oxide powders, sintering the mixture, impregnating the sintered mixture with cobalt and then heating the impregnated sintered mixture.
Claim 7
Dependent Claim
35 words
A fuel cell according to claim 1 wherein the ternary anode is prepared by mixing nickel and cobalt powders, sintering the mixture, then impregnating the sintered mixture with chromium and selectively oxidizing only the chromium.
Claim 8
Dependent Claim
40 words
A fuel cell according to claim 1 wherein the ternary anode is prepared by firstly sintering a nickel powder, impregnating the sintered nickel powder with cobalt and chromium, heating the impregnated sintered nickel powder and selectively oxidizing only the chromium.
Claim 9
Dependent Claim
29 words
A fuel cell according to claim 1 wherein the ternary anode is prepared by mixing nickel, chromium and cobalt powders, sintering the mixture and selectively oxidizing only the chromium.
References Cited (Backward Citations)
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |