US5143801A
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US
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Solid oxide fuel cells, and air electrode and electrical interconnection materials therefor
Assignee: Battelle Memorial Institute Inc
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Filing: 1990-10-22
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Granted: 1992-09-01
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Expires: 2010-10-22
Abstract
Abstract In one aspect of the invention, an air electrode material for a solid oxide fuel cell comprises Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8. Preferably, "a" is from 0.4 to 0.7. In another aspect of the invention, an electrical interconnection material for a solid oxide fuel cell comprises Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0 to 9.3. Preferably, "b" is from 0.3 to 0.5 and "c" is from 0.05 to 0.1. A composite solid oxide electrochemical fuel cell incorporating these materials comprises: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y, the air electrode comprising Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8, the electrical interconnection comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttrium stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO 2 , where "X" is an elemental metal.
Inventors
- 👤 J. Lambert Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/10; H01M8/12; H01M8/1213; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
58 words
A solid oxide electrochemical fuel cell comprising a solid air electrode, fuel electrode, electrical interconnection between adjacent cell's air and fuel electrodes, and electrolyte, the air electrode predominately comprising Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8.
Claim 2
Dependent Claim
58 words
A solid oxide electrochemical fuel cell comprising a solid air electrode, fuel electrode, electrical interconnection between adjacent cell's air and fuel electrodes, and electrolyte, the air electrode predominately comprising Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8.
Claim 3
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 1 wherein "a" is from 0.4 to 0.7.
Claim 4
Dependent Claim
58 words
A solid oxide electrochemical fuel cell comprising a solid air electrode, fuel electrode, electrical interconnection between adjacent cell's air and fuel electrodes, and electrolyte, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3.
Claim 5
Dependent Claim
58 words
A solid oxide electrochemical fuel cell comprising a solid air electrode, fuel electrode, electrical interconnection between adjacent cell's air and fuel electrodes, and electrolyte, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3.
Claim 6
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 3 wherein "b" is from 0.3 to 0.5.
Claim 7
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 3 wherein "c" is from 0.05 to 0.1.
Claim 8
Dependent Claim
23 words
The solid oxide electrochemical fuel cell of claim 3 wherein, "b" is from 0.3 to 0.5; and "c" is from 0.05 to 0.1.
Claim 9
Dependent Claim
127 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y, the air electrode predominately comprising Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO 2 , where "X" is an elemental metal.
Claim 10
Dependent Claim
127 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y, the air electrode predominately comprising Y 1-a Q a MnO 3 , where "Q" is selected from the group consisting of Ca and Sr or mixtures thereof and "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO 2 , where "X" is an elemental metal.
Claim 11
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 7 wherein "a" is from 0.4 to 0.7.
Claim 12
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 7 wherein "b" is from 0.3 to 0.5.
Claim 13
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 7 wherein "c" is from 0.05 to 0.1.
Claim 14
Dependent Claim
23 words
The solid oxide electrochemical fuel cell of claim 7 wherein, "a" is from 0.4 to 0.7; and "b" is from 0.3 to 0.5.
Claim 15
Dependent Claim
29 words
The solid oxide electrochemical fuel cell of claim 7 wherein, "a" is from 0.4 to 0.7; "a" is from 0.3 to 0.5; and "c" is from 0.05 to 0.1.
Claim 16
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 7 wherein "d" is from 0.08 to 0.12.
Claim 17
Dependent Claim
35 words
The solid oxide electrochemical fuel cell of claim 7 wherein, "a" is from 0.4 to 0.7; "b" is from 0.3 to 0.5; "c" is from 0.05 to 0.1; and "d" is from 0.08 to 0.12.
Claim 18
Dependent Claim
30 words
The solid oxide electrochemical fuel cell of claim 7 wherein there are essentially no more cations in the fuel cell beyond Zr, Y, Mn, Cr, Ca, Ni, Al, or Sr.
Claim 19
Dependent Claim
35 words
The solid oxide electrochemical fuel cell of claim 15 wherein, "a" is from 0.4 to 0.7; "b" is from 0.3 to 0.5; "c" is from 0.05 to 0.1; and "d" is from 0.08 to 0.12.
Claim 20
Dependent Claim
118 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y and are commonly doped with Ca, the air electrode predominately comprising Y 1-a Ca a MnO 3 , where "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO 2 , where "X" is an elemental metal.
Claim 21
Dependent Claim
118 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y and are commonly doped with Ca, the air electrode predominately comprising Y 1-a Ca a MnO 3 , where "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; and a solid fuel electrode comprising X-ZrO 2 , where "X" is an elemental metal.
Claim 22
Dependent Claim
23 words
The solid oxide electrochemical fuel cell of claim 17 wherein, "a" is from 0.4 to 0.7; and "b" is from 0.3 to 0.5.
Claim 23
Dependent Claim
35 words
The solid oxide electrochemical fuel cell of claim 17 wherein, "a" is from 0.4 to 0.7; "b" is from 0.3 to 0.5; "c" is from 0.05 to 0.1; and "d" is from 0.08 to 0.12.
Claim 24
Dependent Claim
29 words
The solid oxide electrochemical fuel cell of claim 17 wherein there are essentially no more cations in the fuel cell beyond Zr, Y, Mn, Cr, Ca, Ni, or Al.
Claim 25
Dependent Claim
142 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y and are commonly doped with Ca, the air electrode predominately comprising Y 1-a Ca a MnO 3 , where "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; a solid fuel electrode comprising Ni-(e)Y 2 O 3 -(1-e)ZrO 2 where "e" is from 0.06 to 0.3; and wherein there are essentially no more cations in the fuel cell beyond Zr, Y, Mn, Cr, Ca, Ni or Al.
Claim 26
Dependent Claim
142 words
A solid oxide electrochemical fuel cell comprising: a solid oxide air electrode and an adjacent solid oxide electrical interconnection which commonly include the cation Y and are commonly doped with Ca, the air electrode predominately comprising Y 1-a Ca a MnO 3 , where "a" is from 0.1 to 0.8, the electrical interconnection being substantially gas impermeable and comprising Y 1-b Ca b Cr 1-c Al c O 3 , where "b" is from 0.1 to 0.6 and "c" is from 0.0 to 0.3; a yttria stabilized solid electrolyte comprising (1-d)ZrO 2 -(d)Y 2 O 3 where "d" is from 0.06 to 0.5; a solid fuel electrode comprising Ni-(e)Y 2 O 3 -(1-e)ZrO 2 where "e" is from 0.06 to 0.3; and wherein there are essentially no more cations in the fuel cell beyond Zr, Y, Mn, Cr, Ca, Ni or Al.
Claim 27
Dependent Claim
16 words
The solid oxide electrochemical fuel cell of claim 21 wherein "e" is from 0.06 to 0.12.
Claim 28
Dependent Claim
23 words
The solid oxide electrochemical fuel cell of claim 21 wherein, "a" is from 0.4 to 0.7; and "b" is from 0.3 to 0.5.
Claim 29
Dependent Claim
35 words
The solid oxide electrochemical fuel cell of claim 21 wherein, "a" is from 0.4 to 0.7; "b" is from 0.3 to 0.5; "c" is from 0.05 to 0.1; and "d" is from 0.08 to 0.12.
Claim 30
Dependent Claim
41 words
The solid oxide electrochemical fuel cell of claim 21 wherein, "a" is from 0.4 to 0.7; "b" is from 0.3 to 0.5; "c" is from 0.05 to 0.1; "d" is from 0.08 to 0.12; and "e" is from 0.06 to 0.12.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |