US4649022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a current collector for a sodium/sulfur battery
Assignee: Ford Motor Co
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Filing: 1984-04-23
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Granted: 1987-03-10
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Expires: 2004-04-23
Abstract
Abstract This specification is directed to a method of making a current collector (14) for a sodium/sulfur battery (10). The current collector so-made is electronically conductive and resistant to corrosive attack by sulfur/polysulfide melts. The method includes the step of forming the current collector for the sodium/sulfur battery from a composite material (16) formed of aluminum filled with electronically conductive fibers selected from the group of fibers consisting essentially of graphite fibers having a diameter up to 10 microns and silicon carbide fibers having a diameter in a range of 500-1000 angstroms.
Inventors
- 👤 Ragnar P. Tischer
- 👤 Walter L. Winterbottom
- 👤 Halina S. Wroblowa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:55
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; C; C22; C22C; C22C49/00; C22C49/02; C22C49/04; C22C49/06; C22C49/14; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/661; H01M4/663; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A method of making a current collector for a sodium/sulfur battery, which current collector is electronically conductive and resistant to corrosive attack by sodium/polysulfide melts, which method comprises the step of: forming said current collector for said sodium/sulfur battery from an evenly dispersed microscopic composite material formed of 70-90% by volume of aluminum filled with 30-10% by volume of electronically conductive fibers selected from the group of fibers consisting essentially of graphite fibers having a diameter up to 10 microns and silicon carbide fibers having a diameter in a range of 500-1000 angstroms; and treating said current collector after formation thereof so as to remove aluminum from surfaces thereof to be in contact with sodium/polysulfide melts, whereby surface ones of said electronically conductive ceramic fibers extend outwardly from said surfaces into said sodium/polysulfide melts and an aluminum sulfide surface coating can form on said aluminum between adjacent ones of said electronically conductive ceramic fibers when said sodium/sulfur battery formed using said current collector is in operation.
Claim 2
Independent Claim
166 words
A method of making a current collector for a sodium/sulfur battery, which current collector is electronically conductive and resistant to corrosive attack by sodium/polysulfide melts, which method comprises the step of: forming said current collector for said sodium/sulfur battery from an evenly dispersed microscopic composite material formed of 70-90% by volume of aluminum filled with 30-10% by volume of electronically conductive fibers selected from the group of fibers consisting essentially of graphite fibers having a diameter up to 10 microns and silicon carbide fibers having a diameter in a range of 500-1000 angstroms; and treating said current collector after formation thereof so as to remove aluminum from surfaces thereof to be in contact with sodium/polysulfide melts, whereby surface ones of said electronically conductive ceramic fibers extend outwardly from said surfaces into said sodium/polysulfide melts and an aluminum sulfide surface coating can form on said aluminum between adjacent ones of said electronically conductive ceramic fibers when said sodium/sulfur battery formed using said current collector is in operation.
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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |