Patent US3884715A successfully refreshed from Google Patents.
US3884715A
Expired / Lapsed
US
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Secondary electrochemical power-producing cells having mixed cathode composition
Assignee: United States Department of Energy
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Filing: 1973-09-28
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Granted: 1975-05-20
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Expires: 1993-09-28
Abstract
Abstract A secondary electrochemical power-producing cell including an anode containing a molten alkali metal of low electronegativity, an electrolyte containing alkali-metal ions and a cathode containing a mixture of a chalcogen and a component which reduces the activity of said chalcogen in the electrolyte, thereby inhibiting transfer of the chalcogen from the cathode to the anode and increasing the cell life.
Inventors
- 👤 Eddie C Gay
- 👤 Hiroshi Shimotake
- 👤 Elton J Cairns
- 👤 William J Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M4/00; H01M4/02; H01M4/36; H01M4/38; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
49 words
IN A HIGH-TEMPERATURE, SECONDARY ELECTROCHEMICAL CELL COMPRISING AN ANODE CONTAINING AN ALKALI METAL, AN ELECTROLYTE CONTAINING IONS OF SAID METAL AND A CATHODE CONTAINING SULFUR, THE IMPROVEMENT WHEREIN SAID CATHODE INCLUDES ABOUT 10 ATOM PERCENT ARSENIC IN A SULFUR-ARSENIC MIXTURE TO INHIBIT LOSS OF SAID SULFFUR FROM SAID CATHODE.
Claim 2
Dependent Claim
49 words
IN A HIGH-TEMPERATURE, SECONDARY ELECTROCHEMICAL CELL COMPRISING AN ANODE CONTAINING AN ALKALI METAL, AN ELECTROLYTE CONTAINING IONS OF SAID METAL AND A CATHODE CONTAINING SULFUR, THE IMPROVEMENT WHEREIN SAID CATHODE INCLUDES ABOUT 10 ATOM PERCENT ARSENIC IN A SULFUR-ARSENIC MIXTURE TO INHIBIT LOSS OF SAID SULFFUR FROM SAID CATHODE.
Claim 3
Dependent Claim
54 words
In a high temperature, secondary electrochemical cell comprising an anode containing an alkali metal, an electrolyte containing ions of said metal and a cathode containing selenium, the improvement wherein said cathode includes about 2 atom percent thallium in a selenium-thallium mixture to suppress the transfer of said selenium from said cathode to said anode.
Claim 4
Dependent Claim
54 words
In a high temperature, secondary electrochemical cell comprising an anode containing an alkali metal, an electrolyte containing ions of said metal and a cathode containing selenium, the improvement wherein said cathode includes about 2 atom percent thallium in a selenium-thallium mixture to suppress the transfer of said selenium from said cathode to said anode.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |