Patent US3844837A successfully refreshed from Google Patents.
US3844837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonaqueous battery
Assignee: United States Department of the Navy
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Filing: 1972-07-07
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Granted: 1974-10-29
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Expires: 1992-07-07
Abstract
Abstract Batteries in which the cathodes are electronically conducting lamellar compounds of graphite are described. Fabrication is carried out by preparing a discharged battery having a reinforced pyrolytic graphite cathode, a nonwoven polypropylene cloth separator, an anode substrate and an electrolyte solution of a suitable lithium salt in either dimethyl sulfite or propylene carbonate between the cathode and anode and then charging the battery to cause an electronically conducting lamellar compound of graphite to be formed as the cathode and lithium to be precipitated as the anode on the anode substrate.
Inventors
- 👤 D Bennion
- 👤 J Dunning
- 👤 W Tiedemann
- 👤 L Hsueh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:28
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; H01M2004/026; H01M2004/028; H01M4/587; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
A NONAQUEOUS BATTERY COMPRISING, A. AN ELECTRONICALLY CONDUCTING CATHODE FORMED BY REACTING PYROLYTIC GRAPHITE WITH A SALT SELECTED FROM THE GROUP CONSISTING OF LICLO4, LICF3SO3 AND LIBF4, TO FORM A COMPOUND OF PYROLYTIC GRAPHITE AND THE NEGATIVE ION OF SAID SALT; B. A LITHIUM ANODE; AND C. AN ELECTROLYTE SOLUTION MADE UP BY DISSOLVING A SALT SELECTED FROM THE GROUP CONSITING OF LICLO4, LICF3SO3, AND LIBF4 IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYL SULFITE AND PROPYLENE CARBONATE.
Claim 2
Dependent Claim
80 words
A NONAQUEOUS BATTERY COMPRISING, A. AN ELECTRONICALLY CONDUCTING CATHODE FORMED BY REACTING PYROLYTIC GRAPHITE WITH A SALT SELECTED FROM THE GROUP CONSISTING OF LICLO4, LICF3SO3 AND LIBF4, TO FORM A COMPOUND OF PYROLYTIC GRAPHITE AND THE NEGATIVE ION OF SAID SALT; B. A LITHIUM ANODE; AND C. AN ELECTROLYTE SOLUTION MADE UP BY DISSOLVING A SALT SELECTED FROM THE GROUP CONSITING OF LICLO4, LICF3SO3, AND LIBF4 IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF DIMETHYL SULFITE AND PROPYLENE CARBONATE.
Claim 3
Dependent Claim
18 words
A battery according to claim 1 wherein said cathode is formed by the reaction of LiClO4 with graphite.
Claim 4
Dependent Claim
18 words
A battery according to claim 1 wherein said cathode is formed by the reaction of LiCF3SO3 with graphite.
Claim 5
Dependent Claim
18 words
A battery according to claim 1 wherein said cathode is formed by the reaction of LiBF4 with graphite.
Claim 6
Dependent Claim
126 words
A method for fabricating a battery of the type described in claim 1, said method comprising the steps of: a. preparing a discharged battery having a pyrolytic graphite cathode, a nonwoven polypropylene cloth separator, an anode substrate selected from the group consisting of lithium metal, copper metal, aluminum metal, nickel metal, stainless steel and graphite and an electrolyte solution made up of a salt selected from the group consisting of LiCF3SO3, LiClO4 and LiBF4 dissolved in a solvent selected from the group consisting of dimethyl sulfite and propylene carbonate; and b. charging said battery to cause a reaction wherein an electronically conducting lamellar compound of graphite and the negative ion of said salt is formed as the cathode and Li is deposited on said anode substrate.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |