US4093784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium primary cell
Assignee: United States Department of the Army
•
Filing: 1977-08-26
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Granted: 1978-06-06
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Expires: 1997-08-26
Abstract
Abstract A lithium primary cell including lithium as the anode, a solution of an iganic salt in an inorganic solvent as the electrolyte, and a current collector as the cathode is improved in cell performance by coating the lithium anode with calcium.
Inventors
- 👤 Joseph R. Driscoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:15
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
In a lithium primary cell including lithium as the anode, a solution of an inorganic salt in an inorganic solvent as the electrolyte, and a current collector as the cathode, the improvement in cell performance obtained by coating the lithium anode with calcium.
Claim 2
Dependent Claim
43 words
In a lithium primary cell including lithium as the anode, a solution of an inorganic salt in an inorganic solvent as the electrolyte, and a current collector as the cathode, the improvement in cell performance obtained by coating the lithium anode with calcium.
Claim 3
Dependent Claim
26 words
An improved lithium primary cell according to claim 1 wherein the inorganic salt is selected from the group consisting of LiAlCl 4 and LiSbCl 6 .
Claim 4
Dependent Claim
34 words
An improved lithium primary cell according to claim 1 wherein the inorganic solvent is a covalent inorganic oxychloride solvent selected from the group consisting of thionyl chloride, phosphorous oxychloride, monofluorophosphoryl dichloride, and sulfuryl chloride.
Claim 5
Dependent Claim
25 words
An improved lithium primary cell according to claim 1 wherein the electrolyte is a solution of about 1.5 molar LiAlCl 4 in SOCl 2 .
Claim 6
Dependent Claim
29 words
An improved lithium primary cell according to claim 4 wherein the lithium anode is coated with calcium by exchange from a solution containing dissolved calcium in SOCl 2 .
Claim 7
Dependent Claim
21 words
An improved lithium primary cell according to claim 1 wherein the current collector is a high surface area electronically conducting material.
Claim 8
Dependent Claim
27 words
An improved lithium primary cell according to claim 6 wherein the high surface area electronically conducting material is selected from the group consisting of carbon and graphite.
Claim 9
Dependent Claim
19 words
An improved lithium primary cell according to claim 7 wherein the high surface area electronically conducting material is carbon.
Claim 10
Dependent Claim
21 words
An improved lithium primary cell according to claim 4 wherein the current collector is a high surface area electronically conducting material.
Claim 11
Dependent Claim
27 words
An improved lithium primary cell according to claim 9 wherein the high surface area electronically conducting material is selected from the group consisting of carbon and graphite.
Claim 12
Dependent Claim
19 words
An improved lithium primary cell according to claim 10 wherein the high surface area electronically conducting material is carbon.
Claim 13
Dependent Claim
20 words
An improved lithium primary cell according to claim 1 wherein said inorganic solvent is also the depolarizer for the battery.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |