US4789561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen electrode with layer comprising electrode and electrolyte materials
Assignee: Dornier System GmbH
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Filing: 1987-04-01
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Granted: 1988-12-06
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Expires: 2007-04-01
Abstract
Abstract The electrode is made by depositing a slurry as a first layer onto a solid electrolyte ceramic of stabilized ZrO 2 . The slurry is a blend of a powder of a ceramic electronic conductor such as La 1-x Ca x Mn 1+y 03 or La 1-x SR x Sr x Mn 1+y 03 and a powder of a ceramic ionic conductor being of the same kind as the electrolyte. Onto the first layer a slurry of powder of the same ceramic electronic conductor used in the first slurry is deposited as a second layer. The layers are deposited by spray coating or dipping and are fired simultaneously thereafter or sequentially following respective application.
Inventors
- 👤 Wolfgang Schaefer
- 👤 Rainer Schmidberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:13
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/407; G01N27/4075; C; C25; C25B; C25B1/00; C25B1/01; C25B1/02; C25B11/00; C25B9/00; C25B9/17; C25B9/19; C25B9/23; H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; H01M4/9016; H01M4/9025; H01M4/9033; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
Method of making oxygen electrodes for use in electrolysis cell in conjunction with a solid electrolyte and having a long use life, comprising the steps of: providing a powder of a ceramic electronic conductor; providing a powder of a ceramic ionic conductor being of the same kind as the electrolyte; blending said powders in a first slurry; forming a first layer by spray coating or dipping a solid electrolyte with or in said first slurry to obtain the first layer on the solid electrolyte; providing a second slurry of said ceramic electronic conductor powder; providing on said spray coated or dipped, first slurry layer, the second slurry of powder to obtain a second layer also by spray coating or diffusing; and firing the first and second layers.
Claim 2
Dependent Claim
127 words
Method of making oxygen electrodes for use in electrolysis cell in conjunction with a solid electrolyte and having a long use life, comprising the steps of: providing a powder of a ceramic electronic conductor; providing a powder of a ceramic ionic conductor being of the same kind as the electrolyte; blending said powders in a first slurry; forming a first layer by spray coating or dipping a solid electrolyte with or in said first slurry to obtain the first layer on the solid electrolyte; providing a second slurry of said ceramic electronic conductor powder; providing on said spray coated or dipped, first slurry layer, the second slurry of powder to obtain a second layer also by spray coating or diffusing; and firing the first and second layers.
Claim 3
Dependent Claim
14 words
Method as in claim 1 wherein said first and second layers are fired simultaneously.
Claim 4
Dependent Claim
19 words
Method as in claim 1 wherein the first layer is fired prior to the providing of the second layer.
Claim 5
Dependent Claim
47 words
Method as in claim 1, using as the ceramic, electronic conductor a composition of La 1-x Ca x Mn 1+y O 3 or La 1-x Sr x Mn 1+y O 3 with x=to or larger than 0.2 but not larger than 0.6, and y=to or below 0.1.
Claim 6
Dependent Claim
65 words
Method as in claim 1, comprising the additional step of using as a ceramic, ionic conductor one of the following CeO 2 , MgO stabilized ZrO 2 , CaO stabilized ZrO 2 , Y 2 O 3 stabilized ZrO 2 , Yb 2 O 3 stabilized ZrO 2 , other rare earth stabilized ZrO 2 or a blend of CeO 2 and ZrO 2 .
Claim 7
Dependent Claim
25 words
Method as in claim 1, comprising the step of using the same kind of ceramic material for the electronic conductor as blended and as electrolyte.
Claim 8
Dependent Claim
47 words
Method as in claim 6, using as the ceramic, electronic conductor a composition of La 1-x Ca x Mn 1+y O 3 or La 1-x Sr x Mn 1+y O 3 with x=to or larger than 0.2 but not larger than 0.6, and y=to or below 0.1.
Claim 9
Dependent Claim
65 words
Method as in claim 6, comprising the additional step of using as a ceramic, ionic conductor one of the following CeO 2 , MgO stabilized ZrO 2 , CaO stabilized ZrO 2 , Y 2 O 3 stabilized ZrO 2 , Yb 2 O 3 stabilized ZrO 2 , other rare earth stabilized ZrO 2 or a blend of CeO 2 and ZrO 2 .
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) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |