US4797332A
Expired / Lapsed
US
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Method of preparing ceramic surfaces for wetting thereof by alkali metals
Assignee: AREG ANTRIEBE-REGELTECHNIK-ELEKTRONIK GmbH
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Filing: 1987-09-16
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Granted: 1989-01-10
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Expires: 2007-09-16
Abstract
Abstract The invention provides a method of preparing a surface of a ceramic solid electrolyte conductor of alkali metal ions for wetting by said alkali metal in molten form. The method comprises doping the ceramic surface with an oxide of a transition metal. Transition metals such as Fe, Ni, Cu, Mn, Co, Cr or Mo have suitable oxides for doping beta-alumina for wetting by sodium.
Inventors
- 👤 Peter Barrow
- 👤 Michael L. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:11
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/01; C04B35/10; C04B35/111; C04B35/113; C04B41/45; C04B41/50; C04B41/5025; C04B41/80; C04B41/81; C04B41/85; C04B41/87; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; H01M10/3927; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A method of preparing a surface of a ceramic solid electrolyte conductor of alkali metal ions for wetting, in molten form, by the alkali metal whose ions are conducted by the ceramic, which method comprises doping the ceramic surface with an oxide of a transition metal.
Claim 2
Independent Claim
46 words
A method of preparing a surface of a ceramic solid electrolyte conductor of alkali metal ions for wetting, in molten form, by the alkali metal whose ions are conducted by the ceramic, which method comprises doping the ceramic surface with an oxide of a transition metal.
Claim 3
Dependent Claim
55 words
A method as claimed in claim 1, in which the solid electrolyte is a member of the group comprising beta-alumina and nasicon ceramic solid electrolyte conductors of sodium ions, the doping being by means of an oxide of a single transition metal selected from the group comprising iron, nickel, copper, manganese, cobalt, chromium and molybdenum.
Claim 4
Dependent Claim
62 words
A method as claimed in claim 1, which comprises wetting the surface with a film of a solution in a liquid solvent of a salt of the transition metal, evaporating the solvent from the surface to dry the surface and to leave a deposit of the salt on the surface, and converting the deposited salt to the oxide of the transition metal.
Claim 5
Dependent Claim
32 words
A method as claimed in claim 3, in which the solution is a solution of the salt in a solvent which is selected from the group comprising water, methanol, ethanol and n-propanol.
Claim 6
Dependent Claim
25 words
A method as claimed in claim 3, in which converting the deposited salt to the oxide comprises heating the dried ceramic to an elevated temperature.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 5, in which the heating takes place in an oxygen-containing oxidizing atmosphere.
Claim 8
Dependent Claim
30 words
A method as claimed in claim 3, in which the salt is a compound of the transition metal with an anion selected from the group comprising halide and nitrate anions.
Claim 9
Dependent Claim
59 words
A method as claimed in claim 1, which comprises wetting the surface with a film of a suspension in a liquid of the transition metal oxide, evaporating the liquid of the suspension to dry the surface and leave a deposit of the oxide on the surface, and heating the dried surface to cause the oxide to dope the surface.
Claim 10
Dependent Claim
35 words
A method as claimed in claim 8, in which the transition metal oxide forms part of a mixed oxide, being mixed with an oxide of the alkali metal whose ions are conducted by the ceramic.
Claim 11
Dependent Claim
29 words
A method as claimed in claim 8, in which the liquid of the suspension is selected from the group comprising methanol, ethanol, n-propanol and mixtures thereof, and is anhydrous.
Claim 12
Dependent Claim
25 words
A ceramic solid electrolyte conductor of alkali metal ions which has a surface which has been prepared for wetting by the method of claim 1.
Claim 13
Dependent Claim
82 words
A high temperature electrochemical power storage cell having a molten alkali metal anode, a cathode, and between the anode and the cathode and separating them from each other, a separator which is a ceramic solid electrolyte conductor of ions of the alkali metal of the anode, the separator having a surface in contact with the molten alkali metal of the anode which has been prepared for wetting by the alkali metal of the anode, by a method as claimed in claim 1.
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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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |