Patent US5277995A successfully refreshed from Google Patents.
US5277995A
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Electrode and method of interconnection sintering on an electrode of an electrochemical cell
Assignee: Siemens Energy Inc
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Filing: 1993-03-16
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Granted: 1994-01-11
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Expires: 2013-03-16
Abstract
Abstract An electrode structure (10) is made by applying a base layer of doped LaCrO 3 particles on a portion of an electrode (16) and then coating the particles with a top layer composition such as CaO+Al 2 O 3 , SrO+Al 2 O 3 , or BaO+Al 2 O 3 , and then heating the composition for a time effective to melt the composition and allow it to fill any open porosity in the base layer of doped LaCrO 3 to form an interconnection (26), after which solid oxide electrolyte (18) can be applied to the remaining portion of the electrode (16) and the electrolyte (18) can be covered with a cermet exterior electrode (20).
Inventors
- 👤 Roswell J. Ruka
- 👤 Lewis J. H. Kuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:12
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/02; H01M8/0202; H01M8/023; H01M8/0236; G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/664; H01M8/0241; H01M8/0245; H01M8/0247; H01M8/0252; H01M8/24; H01M8/241; H01M8/2425; H01M8/243; H01M8/10; H01M8/12; H01M2008/1293; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0068; H01M2300/0071; H01M2300/0074; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49115
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A method of depositing a dense, high temperature electronically conductive interconnection on an electrode structure, comprising the steps: (a) applying a thin porous, base layer of doped LaCrO 3 particles and organic polymer binder on a portion of a first surface of an electrode structure; (b) coating the base layer with a top layer composition selected from the group consisting of CaO+Al 2 O 3 , SrO+Al 2 O 3 , BaO+Al 2 O 3 , CaO+TiO 2 , SrO+TiO 2 , BaO+TiO 2 , and their mixtures; and (c) heating the base layer and the top layer to a temperature and for a time effective to melt the top layer composition and allow it to fill any open pores in the porous base layer of doped LaCrO 3 .
Claim 2
Independent Claim
130 words
A method of depositing a dense, high temperature electronically conductive interconnection on an electrode structure, comprising the steps: (a) applying a thin porous, base layer of doped LaCrO 3 particles and organic polymer binder on a portion of a first surface of an electrode structure; (b) coating the base layer with a top layer composition selected from the group consisting of CaO+Al 2 O 3 , SrO+Al 2 O 3 , BaO+Al 2 O 3 , CaO+TiO 2 , SrO+TiO 2 , BaO+TiO 2 , and their mixtures; and (c) heating the base layer and the top layer to a temperature and for a time effective to melt the top layer composition and allow it to fill any open pores in the porous base layer of doped LaCrO 3 .
Claim 3
Dependent Claim
22 words
The method of claim 1, where the LaCrO 3 is doped with at least one of Ca, Ba, Sr, Co, and Mg.
Claim 4
Dependent Claim
61 words
The method of claim 1, where the electrode is a self supporting, tubular, axially elongated structure comprising Ca or Sr doped LaMnO 3 , and where, after step (a), the particles and binder are heated to remove the binder and provide a layer of doped LaCrO 3 particles, which particles are further heated to firmly attach them to the electrode structure.
Claim 5
Dependent Claim
48 words
The method of claim 1, where the LaCrO 3 is doped with Sr and Co, and where, after step (b) the LaCrO 3 particles and the top layer composition are first heated to sinter the particles to the electrode structure and then to melt the top layer composition.
Claim 6
Dependent Claim
63 words
The method of claim 1, where the top layer composition is selected from the group consisting of (CaO) 12 .(Al 2 O 3 ) 7 and Sr 3 Al 2 O 6 , and where the top layer is applied as an organic based slurry or tape and the doped LaCrO 3 particles are applied as an organic based slurry or a tape.
Claim 7
Dependent Claim
35 words
Method of claim 1, where a solid oxide electrolyte is applied to the remaining portion of the electrode structure, which electrolyte is then substantially coated with a cermet, exterior electrode to provide an electrochemical cell.
Claim 8
Dependent Claim
16 words
The method of claim 6, where a plurality of the electrochemical cells are electrically connected together.
Claim 9
Dependent Claim
90 words
A self-supporting, gas-permeable, electrically conductive electrode having on a selected portion thereof a sintered layer of doped LaCrO 3 , which layer is a solid solution of doped LaCrO 3 and a composition selected from the group consisting of CaO+Al 2 O 3 , SrO+Al 2 O 3 , BaO+Al 2 O 3 , CaO+TiO 2 , SrO+TiO 2 , BaO+TiO 2 , and their mixtures; and where the remaining portion of the electrode is covered with solid oxide electrolyte, which electrolyte is substantially covered with a cermet exterior electrode.
Claim 10
Dependent Claim
90 words
A self-supporting, gas-permeable, electrically conductive electrode having on a selected portion thereof a sintered layer of doped LaCrO 3 , which layer is a solid solution of doped LaCrO 3 and a composition selected from the group consisting of CaO+Al 2 O 3 , SrO+Al 2 O 3 , BaO+Al 2 O 3 , CaO+TiO 2 , SrO+TiO 2 , BaO+TiO 2 , and their mixtures; and where the remaining portion of the electrode is covered with solid oxide electrolyte, which electrolyte is substantially covered with a cermet exterior electrode.
Claim 11
Dependent Claim
69 words
The electrode of claim 8, where the LaCrO 3 is doped with at least one of Ca, Ba, Sr, Co, and Mg, the electrode is a self supporting, axially elongated tube comprising Ca or Sr doped LaMnO 3 , and the composition in the solid solution is selected from the group consisting of (CaO) 12 .(Al 2 O 3 ) 7 and Sr 3 Al 2 O 6 .
Claim 12
Dependent Claim
11 words
A plurality of the electrodes of claim 8 electrically connected together.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-10 | 1997-07-12 | 1998-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-10 | 2001-07-12 | 2002-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-10 | 2005-07-12 | 2006-01-11 | $7700.00 | Window Closed / Lapsed |