US3960595A
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Electrochemical generator
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1974-09-19
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Granted: 1976-06-01
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Expires: 1994-09-19
Abstract
Abstract The invention relates to high energy density electrochemical generators of the alkaline, more particularly lithium, negative electrode type. An electrolyte whose solvent contains 1-3 dioxane, dioxolane or propylene oxide, preferably mixed with propylene carbonate or ethylene carbonate is utilized. This electrolyte has excellent conductivity, even at a relatively slight concentration of the solute. Lithium perchlorate is preferred as the solute and copper oxide, monovalent silver chromate, lead chromate, fluorinated carbons, polymerized fluorinated carbons or mixtures of these latter with metal compounds are preferred as active positive material.
Inventors
- 👤 Gerard Lehmann
- 👤 Therese Rassinoux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:54
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
66 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and at least one solvent consisting of an ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 2
Dependent Claim
66 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and at least one solvent consisting of an ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 3
Dependent Claim
13 words
Electrochemical cell according to claim 1, wherein the electrolyte solute is lithium perchlorate.
Claim 4
Dependent Claim
21 words
Electrochemical cell according to claim 2, wherein the concentration of lithium perchlorate is in the range of 1 to 2.5 M.
Claim 5
Dependent Claim
90 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and at least one solvent which is a mixture consisting of from 10-50% of an ester selected from the group consisting of propylene carbonate and ethylene carbonate and the balance being 90-50% of an ester selected from the group consisting of propylene oxide and dioxolane.
Claim 6
Dependent Claim
90 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and at least one solvent which is a mixture consisting of from 10-50% of an ester selected from the group consisting of propylene carbonate and ethylene carbonate and the balance being 90-50% of an ester selected from the group consisting of propylene oxide and dioxolane.
Claim 7
Dependent Claim
66 words
For use in an electrochemical generator of the type including a negative electrode whose active material is lithium, and whose positive electrode contains active material selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising a solute and at least one solvent, said solvent consisting of a saturated ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 8
Dependent Claim
66 words
For use in an electrochemical generator of the type including a negative electrode whose active material is lithium, and whose positive electrode contains active material selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising a solute and at least one solvent, said solvent consisting of a saturated ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 9
Dependent Claim
93 words
For use in an electrochemical generator of the type including a negative electrode whose active material is lithium, and whose positive electrode contains positive active material selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising a solute and at least one solvent, said solvent consisting of a mixture of from about 90% to about 50% by volume of an ether selected from the group consisting of dioxolane and propylene oxide and the balance being an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 10
Dependent Claim
93 words
For use in an electrochemical generator of the type including a negative electrode whose active material is lithium, and whose positive electrode contains positive active material selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising a solute and at least one solvent, said solvent consisting of a mixture of from about 90% to about 50% by volume of an ether selected from the group consisting of dioxolane and propylene oxide and the balance being an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 11
Dependent Claim
21 words
For use in an electrochemical cell according to claim 5, an electrolyte wherein said solute in said solvent is lithium perchlorate.
Claim 12
Dependent Claim
61 words
Electrochemical cell with a negative electrode, the active material of which is lithium and with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and one solvent, said solvent consisting of an ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 13
Dependent Claim
61 words
Electrochemical cell with a negative electrode, the active material of which is lithium and with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and one solvent, said solvent consisting of an ether selected from the group consisting of 1-3 dioxane, dioxolane and propylene oxide.
Claim 14
Dependent Claim
49 words
Electrochemical cell with a negative electrode, the active material of which is lithium and with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and one solvent, said solvent consisting of propylene oxide
Claim 15
Dependent Claim
49 words
Electrochemical cell with a negative electrode, the active material of which is lithium and with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte in said cell comprising a solute and one solvent, said solvent consisting of propylene oxide
Claim 16
Dependent Claim
20 words
Electrochemical cell according to claim 8 wherein said solute is a lithium perchlorate whose concentration ranges from 1 to 2.5M.
Claim 17
Dependent Claim
92 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte comprising a solute and a solvent, said solvent consisting of a mixture of from about 90% to about 50% by volume of an ether selected from the group consisting of dioxolane and propylene oxide, and the balance from about 10% to about 50% by volume of an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 18
Dependent Claim
92 words
Electrochemical cell with a negative electrode, the active material of which is lithium, with a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate and with an electrolyte comprising a solute and a solvent, said solvent consisting of a mixture of from about 90% to about 50% by volume of an ether selected from the group consisting of dioxolane and propylene oxide, and the balance from about 10% to about 50% by volume of an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 19
Dependent Claim
25 words
For use in an electrochemical generator, an electrolyte according to claim 7, wherein said solute is lithium perchlorate whose concentration ranges from 1 to 2.5M.
Claim 20
Dependent Claim
52 words
For use in an electrochemical generator of the type including a lithium containing negative electrode, a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate, and electrolyte comprising lithium perchlorate as solute, and a solvent, said solvent consisting of propylene oxide.
Claim 21
Dependent Claim
52 words
For use in an electrochemical generator of the type including a lithium containing negative electrode, a positive electrode, the active material of which is selected from the group consisting of copper oxide and monovalent silver chromate, and electrolyte comprising lithium perchlorate as solute, and a solvent, said solvent consisting of propylene oxide.
Claim 22
Dependent Claim
83 words
For use in an electrochemical generator of the type including a lithium containing negative electrode, a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising lithium perchlorate solute whose concentration ranges from approximately 1 to 2.5M, a solvent consisting of a mixture of from about 90% to about 50% of propylane oxide, and the balance from about 10% to about 50% of an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 23
Dependent Claim
83 words
For use in an electrochemical generator of the type including a lithium containing negative electrode, a positive electrode selected from the group consisting of copper oxide and monovalent silver chromate, an electrolyte comprising lithium perchlorate solute whose concentration ranges from approximately 1 to 2.5M, a solvent consisting of a mixture of from about 90% to about 50% of propylane oxide, and the balance from about 10% to about 50% of an ester selected from the group consisting of propylene carbonate and ethylene carbonate.
Claim 24
Dependent Claim
12 words
Electrochemical cell according to claim 4 wherein said solute is lithium perchlorate.
Claim 25
Dependent Claim
20 words
Electrochemical cell according to claim 15 wherein said lithium perchlorate is present in a concentration ranging from 1 to 2.5M.
Claim 26
Dependent Claim
13 words
Electrochemical cell according to claim 4 wherein said ether consists of propylene oxide.
Claim 27
Dependent Claim
13 words
Electrochemical cell according to claim 1 wherein said solvent consists of propylene oxide.
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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |