Patent US430487A successfully refreshed from Google Patents.
Patent EP0032033A2 successfully refreshed from Google Patents.
EP0032033A2
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EP
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Beta-alumina solid electrolyte material and its use in sodium-containing electrochemical cells
Assignee: Chloride Silent Power Ltd
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Filing: 1980-12-19
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Granted: —
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Expires: 2000-12-19
Abstract
Abstract In a sodium sulphur cell or other electrochemical cell or energy conversion device in which beta-alumina is used as a solid electrolyte in contact with liquid sodium, improved wetting of the electrolyte by the sodium is obtained by coating the electrolyte, on the surface in contact with the sodium, with a metal, such as lead or bismuth, which will form an alloy with sodium. Conveniently the electrolyte is coated with an aqueous solution of lead acetate, dried and the lead acetate decomposed by heating to leave a lead coating.
Inventors
- 👤 Michael Lawrence Wright
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 18:29
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
26 words
A beta-alumina solid electrolyte element which has had at least a part of its surface pre-treated with a metal that will form an alloy with sodium.
Claim 2
Dependent Claim
26 words
A beta-alumina solid electrolyte element which has had at least a part of its surface pre-treated with a metal that will form an alloy with sodium.
Claim 3
Dependent Claim
27 words
An electrolyte element as claimed in claim 1 wherein the metal is a metal which will form, with sodium, an alloy having a melting point below 450°C.
Claim 4
Dependent Claim
27 words
An electrolyte element as claimed in claim 1 wherein the metal is a metal which will form, with sodium, an alloy having a melting point below 350°C.
Claim 5
Dependent Claim
45 words
An electrolyte element as claimed in claim 1 and which is used in or for use in a cell having a predetermined operating temperature wherein the metal is a metal which will form, with sodium, an alloy having a melting point below said predetermined temperature.
Claim 6
Dependent Claim
13 words
An electrolyte element as claimed in claim 1 wherein the metal is lead.
Claim 7
Dependent Claim
14 words
An electrolyte element as claimed in of claim 1 wherein the metal is tin.
Claim 8
Dependent Claim
13 words
An electrolyte element as claimed in claim 1 wherein the metal is bismuth.
Claim 9
Dependent Claim
53 words
An electrochemical cell or other energy-conversion device employing beta-alumina solid electrolyte material and molten sodium wherein the electrolyte material has been pre-treated, at least over part of the surface area thereof exposed to the molten sodium in the cell or energy conversion device, with a metal that will form an alloy with sodium.
Claim 10
Dependent Claim
53 words
An electrochemical cell or other energy-conversion device employing beta-alumina solid electrolyte material and molten sodium wherein the electrolyte material has been pre-treated, at least over part of the surface area thereof exposed to the molten sodium in the cell or energy conversion device, with a metal that will form an alloy with sodium.
Claim 11
Dependent Claim
42 words
An electrochemical cell or other energy-conversion device as claimed in claim 8 and adapted for use at a predetermined operating temperature, wherein the metal is a metal which will form, with sodium, an alloy having a melting point below said predetermined temperature.
Claim 12
Dependent Claim
18 words
An electrochemical cell or other energy-conversion device as claimed in claim ; 8 wherein said metal is lead.
Claim 13
Dependent Claim
18 words
11, An electrochemical cell or other energy-conversion device as claimed in claim 8 wherein said metal is tin.
Claim 14
Dependent Claim
17 words
An electrochemical cell or other energy-conversion device as claimed in claim 8 wherein said metal is bismuth.
Claim 15
Independent Claim
58 words
A method of manufacture of a beta-alumina solid electrolyte element, suitable for use in an electrochemical cell or other energy-conversion device employing liquid sodium, which method includes the steps of pre-treating at least part of the surface area of the beta-alumina to be exposed to the liquid sodium with a metal that will form an alloy with sodium.
Claim 16
Independent Claim
58 words
A method of manufacture of a beta-alumina solid electrolyte element, suitable for use in an electrochemical cell or other energy-conversion device employing liquid sodium, which method includes the steps of pre-treating at least part of the surface area of the beta-alumina to be exposed to the liquid sodium with a metal that will form an alloy with sodium.
Claim 17
Dependent Claim
12 words
A method as claimed in claim 13 wherein the metal is lead.
Claim 18
Dependent Claim
30 words
A method as claimed in claim 14 wherein the beta-alumina is coated with an aqueous solution of lead acetate and wherein, after drying, the lead acetate is reduced by heating.
Claim 19
Dependent Claim
12 words
A method as claimed in claim 13 wherein the metal is tin.
Claim 20
Dependent Claim
12 words
A method as claimed in claim 13 wherein the metal is bismuth.
Claim 21
Dependent Claim
12 words
A method as claimed in claim 13 wherein the pre-treatment is chemical.
Claim 22
Dependent Claim
19 words
A method as claimed in claim 18 wherein the pre-treatment comprises reducing a metal compound to the parent metal.
Claim 23
Dependent Claim
25 words
A method as claimed in claim 13 wherein the pre-treatment comprises an electrochemical or electrophoretic deposition of the metal from a suitable solution or suspension.
Claim 24
Dependent Claim
28 words
A method as claimed in claim 13 wherein the pre-treatment comprises a flame spraying, plasma spraying or vacuum deposition to deposit metal on said surface of the beta-alumina.
Claim 25
Dependent Claim
16 words
A beta-alumina solid electrolyte element made by the method of any of claims 13 to 21.
References Cited (Backward Citations)
No citation records indexed.
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