US4069374A
Expired / Lapsed
US
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High energy density electric cells
Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1977-02-16
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Granted: 1978-01-17
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Expires: 1997-02-16
Abstract
Abstract High energy density electric cells have lithium as the negative active material, a silver salt or a silver oxide as the positive material and a solution comprising one solute and at least two solvents as the electrolyte. According to the invention, the first solvent is chosen from the group of esters and the second is chosen from the group formed by benzene and its substituted derivatives.
Inventors
- 👤 Jean-Paul Gabano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:55
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
An electric cell having lithium as its negative active material, a silver salt or silver oxide as its positive active material and a solution comprising one solute and at least two solvents as its electrolyte, the first of the solvents being selected from the group consisting of carbonate and sulphate esters, and the second solvent of the electrolyte being an aromatic hydrocarbon selected from the group, consisting of benzene and its substituted derivatives.
Claim 2
Dependent Claim
73 words
An electric cell having lithium as its negative active material, a silver salt or silver oxide as its positive active material and a solution comprising one solute and at least two solvents as its electrolyte, the first of the solvents being selected from the group consisting of carbonate and sulphate esters, and the second solvent of the electrolyte being an aromatic hydrocarbon selected from the group, consisting of benzene and its substituted derivatives.
Claim 3
Dependent Claim
23 words
An electric cell according to claim 1, wherein said aromatic hydrocarbon is selected from the group consisting of benzene, toluene and the xylenes.
Claim 4
Dependent Claim
24 words
An electric cell according to claim 1, wherein said ester is selected from the group consisting of propylene carbonate, ethylene carbonate and dimethyl carbonate.
Claim 5
Dependent Claim
13 words
An electric cell according to claim 1, wherein the solute is lithium perchlorate.
Claim 6
Dependent Claim
30 words
An electric cell according to claim 1, wherein said ester is selected from the group consisting of dimethyl sulphite, propylene sulphite, propylene glycol sulphite, ethylene glycol sulphite and vinylene sulphite.
Claim 7
Dependent Claim
13 words
An electric cell according to claim 1, wherein the solute is lithium hexafluoroarsenate.
Claim 8
Dependent Claim
58 words
An electric cell according to claim 1, wherein the solute is selected from the group consisting of lithium perchlorate and lithium hexafluoroarsenate and wherein the first solvent is an ester selected from the group consisting of carbonates and sulphites and the second solvent is an aromatic hydrocarbon selected from the group consisting of benzene, toluene and the xylenes.
Claim 9
Dependent Claim
20 words
An electric cell according to claim 1, wherein said electrolyte is a molar solution of said solute and said solvents.
Claim 10
Dependent Claim
29 words
An electric cell accordin to claim 7, wherein said ester and said aromatic hydrocarbon are present in said solution in the respective proportions of 85% and 15%, by volume.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |