US3997362A
Expired / Lapsed
US
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Polyhalide high energy density cells
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-10-14
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Granted: 1976-12-14
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Expires: 1995-10-14
Abstract
Abstract An improved electrochemical cell comprises an alkali metal anode, a cathode, an oxidant of at least one quaternary ammonium polyhalide salt, and a dipolar aprotic electrolyte containing an ionizable salt of an alkali metal. A specific example includes a lithium anode, a carbon cathode, a tetraalkylammonium tribromide salt and an electrolyte of one mole lithium hexafluoride dissolved in propylene carbonate, which cell provides an open circuit voltage of about 3.6 volts. The oxidant can be incorporated in the cathode structure or be added independently to the cell, e.g., by use of a circulating electrolyte.
Inventors
- 👤 Daniel J. Eustace
- 👤 Bhaskara M. L. Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/582; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
An electrochemical cell comprising an anode containing at least one alkali metal as the anode-active material, a cathode, an oxidant of at least one quaternary ammonium polyhalide and an electrolyte of an aprotic solvent having an ionizable salt of at least one alkali metal dissolved therein.
Claim 2
Dependent Claim
46 words
An electrochemical cell comprising an anode containing at least one alkali metal as the anode-active material, a cathode, an oxidant of at least one quaternary ammonium polyhalide and an electrolyte of an aprotic solvent having an ionizable salt of at least one alkali metal dissolved therein.
Claim 3
Dependent Claim
16 words
The electrochemical cell described in claim 1 wherein the cathode comprises an electrochemically inactive electronic conductor.
Claim 4
Dependent Claim
18 words
The electrochemical cell described in claim 1 wherein the cathode includes porous carbon with the oxidant impregnated thereon.
Claim 5
Dependent Claim
36 words
The electrochemical cell as described in claim 1 wherein the anode contains lithium, the electrolyte is lithium hexafluorophosphate dissolved in propylene carbonate to which is added lithium tetramethylammonium tribromide and the cathode is electronically conductive carbon.
Claim 6
Dependent Claim
27 words
The electrochemical cell described in claim 1 wherein the halide in the polyhalide is at least one member of the group consisting of chlorine, bromine and iodine.
Claim 7
Dependent Claim
28 words
The electrochemical cell as described in claim 1 wherein the aprotic solvent is at least one member selected from the group consisting of propylene carbonate, nitrobenzene and sulfolane.
Claim 8
Dependent Claim
12 words
The electrochemical cell described in claim 1 wherein the anode is lithium.
Claim 9
Dependent Claim
15 words
The electrochemical cell described in claim 1 wherein the anode is an alloy of lithium.
Claim 10
Dependent Claim
36 words
The electrochemical cell described in claim 1 wherein the oxidant is at least one polyhalide selected from the group consisting of tetramethylammonium trichloride, tetramethylammonium tribromide, tetramethylammonium chlorodibromide, tetramethylammonium iododibromide, tetraethylammonium trichloride, tetraethylammonium tribromide, and tetraethylammonium chlorodibromide.
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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |