US4041215A
Expired / Lapsed
US
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Method for forming solid electrolyte composite
Assignee: OI Glass Inc
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Filing: 1976-04-05
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Granted: 1977-08-09
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Expires: 1996-04-05
Abstract
Abstract A solid electrolyte composite is provided which is suitable for use as the separating member between a sodium reservoir source and a sulfur reservoir source in a sodium-sulfur battery; the solid electrolyte composite is manufactured by providing a membrane of a crystalline ionic conductive sodium polyaluminate on a portion of a porous, anhydrous crystalline supporting body consisting of alpha-Al 2 O 3 . The sodium polyaluminate is initially applied in the form of a precursor which is then subsequently heated to form the ionic conductive crystalline sodium polyaluminate membrane.
Inventors
- 👤 Kenneth R. Kormanyos
- 👤 Howard L. McCollister
- 👤 Paul L. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:44
CPC Classifications
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: 10
Claim 1
Independent Claim
90 words
A method for forming a solid electrolyte composite having a porous crystalline alpha-Al 2 O 3 exposed portion and an exposed ionic conductive crystalline sodium polyaluminate membrane portion comprising: contacting a surface of a porous, anhydrous, crystalline body consisting of alpha-Al 2 O 3 with a precursor which on a dry oxide basis substantially corresponds to a sodium polyaluminate composition and heating said contacted surface at a temperature and for a time sufficient to convert the precursor to a crystalline ionic conductive membrane of sodium polyaluminate and form said composite.
Claim 2
Independent Claim
90 words
A method for forming a solid electrolyte composite having a porous crystalline alpha-Al 2 O 3 exposed portion and an exposed ionic conductive crystalline sodium polyaluminate membrane portion comprising: contacting a surface of a porous, anhydrous, crystalline body consisting of alpha-Al 2 O 3 with a precursor which on a dry oxide basis substantially corresponds to a sodium polyaluminate composition and heating said contacted surface at a temperature and for a time sufficient to convert the precursor to a crystalline ionic conductive membrane of sodium polyaluminate and form said composite.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein said precursor on a dry oxide basis consists essentially of about 0 to 5% by weight of Li 2 O, CaO or MgO, and the balance being Na 2 O and Al 2 O 3 .
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the aluminum and sodium moiety of said precursor is obtained from a hydrolyzable compound of Na and a hydrolyzable compound of Al.
Claim 5
Dependent Claim
50 words
The method of claim 3 wherein said compounds are of the formula Na(OR) and Al(OR) 3 wherein R is an alkyl group of 1-5 carbon atoms, or is a radical of the formula --CH 2 --CH 2 --O--R' wherein R' is an alkyl group of 1 to 4 carbon atoms.
Claim 6
Dependent Claim
79 words
The method of claim 3 wherein said precursor consists essentially of the hydrolysis product of hydrolyzable compounds of the formula (a) Na(OR), and (b) Al(OR) 3 and, optionally, (c) Li(OR), or Ca(OR) 2 , or Mg(OR) 2 , or CaAl(OR) 8 , or MgAl(OR) 8 wherein R is an alkyl group of 1-5 carbon atoms, or is a radical of the formula --CH 2 --CH 2 --O--R' wherein R' is an alkyl group of 1 to 4 carbon atoms.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said precursor is an amorphous, particulate material.
Claim 8
Dependent Claim
82 words
The method of claim 3 wherein said precursor is a hydrolyzable precursor in an organic solvent solution consisting essentially of the combination of hydrolyzable compounds of the formula (a) Na(OR), and (b) Al(OR) 3 and, optionally, (c) Li(OR), or Ca(OR) 2 , or Mg(OR) 2 , or CaAl(OR) 8 or MgAl(OR) 8 wherein R is an alkyl group, or is a radical of the formula --CH 2 --CH 2 --O--R' wherein R' is an alkyl group of 1 to 4 carbon atoms.
Claim 9
Dependent Claim
13 words
A solid electrolyte composite produced in accordance with the method of claim 3.
Claim 10
Dependent Claim
35 words
In a sodium sulfur battery comprising a sodium reservoir source, a sulfur reservoir source and a solid electrolyte composite therebetween, the improvement where said solid electrolyte is a composite produced in accordance with claim 3.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |