US3879220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed primary sodium-halogen cell
Assignee: General Electric Co
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Filing: 1974-03-21
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Granted: 1975-04-22
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Expires: 1994-03-21
Abstract
Abstract A sealed primary sodium-halogen cell is disclosed which comprises a casing, an anode positioned in the casing, the anode selected from the class consisting of sodium, sodium as an amalgam, and sodium in a non-aqueous electrolyte, a solid ionconductive electrolyte positioned in the casing adjacent the anode, and a cathode positioned adjacent the opposite side of the electrolyte, the cathode comprising a halogen selected from the class consisting of bromine, iodine and mixtures thereof in a solvent of nitrobenzene. Electronically conductive material, small amounts of ionic salts or a combination of both are added to increase further the cell conductivity.
Inventors
- 👤 Fritz G Will
- 👤 Gregory C Farrington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
A SEALED PRIMARY SODIUM-HALOGEN CELL COMPRISING A CASING, AN ANODE POSITIONED IN THE CASING, THE AODE SELECTED FROM THE CLASS CONSISTING OF SODIUM, SODIUM AS AN AMALGAM, AND SODIUM IN A NONAQUEOUS ELECTROLYTE, A SOLID SODIUM BETAALUMINA ION-CONDUCTIVE ELECTROLYTE POSITIONED IN THE CASING ADJACENT THE ANODE, AND A CATHOD POSITIONED ADJACENT THE OPPOSITE SIDE OF THE ELECTROLYTE, THE CATHODE COMPRISING FROM 5.0 WEIGHT PERCENT TO 95.0 WEIGHT PERCENT OF A HALOGEN SELECTED FROM THE CLASS CONSISTING OF BROMINE, IODINE, AND MIXTURES THEREOF IN NITROBENZENE AS A SOLVENT.
Claim 2
Dependent Claim
87 words
A SEALED PRIMARY SODIUM-HALOGEN CELL COMPRISING A CASING, AN ANODE POSITIONED IN THE CASING, THE AODE SELECTED FROM THE CLASS CONSISTING OF SODIUM, SODIUM AS AN AMALGAM, AND SODIUM IN A NONAQUEOUS ELECTROLYTE, A SOLID SODIUM BETAALUMINA ION-CONDUCTIVE ELECTROLYTE POSITIONED IN THE CASING ADJACENT THE ANODE, AND A CATHOD POSITIONED ADJACENT THE OPPOSITE SIDE OF THE ELECTROLYTE, THE CATHODE COMPRISING FROM 5.0 WEIGHT PERCENT TO 95.0 WEIGHT PERCENT OF A HALOGEN SELECTED FROM THE CLASS CONSISTING OF BROMINE, IODINE, AND MIXTURES THEREOF IN NITROBENZENE AS A SOLVENT.
Claim 3
Dependent Claim
87 words
A sealed primary sodium-halogen cell comprising a casing, an anode positioned in the casing, the anode selected from the class consisting of sodium, sodium as an amalgam, and sodium in a nonaqueous electrolyte, a solid sodium beta-alumina ion-conductive electrolyte positioned in the casing adjacent the anode, and a cathode positioned adjacent the opposite side of the electrolyte, the cathode comprising from 5.0 weight percent to 95.0 weight percent of a halogen selected from the class consisting of bromine, iodine, and mixtures thereof in nitrobenzene as a solvent.
Claim 4
Dependent Claim
87 words
A sealed primary sodium-halogen cell comprising a casing, an anode positioned in the casing, the anode selected from the class consisting of sodium, sodium as an amalgam, and sodium in a nonaqueous electrolyte, a solid sodium beta-alumina ion-conductive electrolyte positioned in the casing adjacent the anode, and a cathode positioned adjacent the opposite side of the electrolyte, the cathode comprising from 5.0 weight percent to 95.0 weight percent of a halogen selected from the class consisting of bromine, iodine, and mixtures thereof in nitrobenzene as a solvent.
Claim 5
Dependent Claim
21 words
A sealed primary sodium-halogen battery as in claim 1, in which the cathode contains a small amount of an ionic salt.
Claim 6
Dependent Claim
18 words
A sealed primary sodium-halogen battery as in claim 1, in which the cathode contains an electronically conductive material.
Claim 7
Dependent Claim
25 words
A sealed primary sodium-halogen battery as in claim 1, in which the cathode contains bromine and from 0.01 to 1.5 weight percent of sodium bromide.
Claim 8
Dependent Claim
25 words
A sealed primary sodium-halogen battery as in claim 1, in which the cathode contains iodine and from 0.01 to 5.0 weight percent of sodium iodide.
References Cited (Backward Citations)
US3730771A
Cited
US3773558A
Cited
US3703415A
Cited
US3817790A
Cited
US3793080A
Cited
US3762955A
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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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |