Patent CA584121A successfully refreshed from Google Patents.
Patent US3947289A successfully refreshed from Google Patents.
US3947289A
Expired / Lapsed
US
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Mixed solvents for high and low temperature organic electrolyte batteries
Assignee: Duracell Inc USA
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Filing: 1973-11-23
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Granted: 1976-03-30
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Expires: 1993-11-23
Abstract
Abstract An organic electrolyte system suitable for use at low and ambient temperatures with active metals is described comprising binary or ternary solvent mixtures having tetrahydrofuran or N-nitrosodimethylamine or mixtures thereof as one component and propylene carbonate; gamma-butryolactone; 1,3-dioxolane; dimethyoxy ethane; bis-2-ethoxyethyl ether; bis-(2-methoxy) ethoxyethyl ether as the other components with active metal salts as the solute. Electrochemical cells with this electrolyte are also described.
Inventors
- 👤 Arabinda Dey
- 👤 Bernard P. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:35
CPC Classifications
H; H01; H01M; H01M12/00; H01M12/04; H01M12/06; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
An electrolyte for use in active metal high potential electrochemical cells comprising an active metal salt dissolved in a non-aqueous solvent system comprising (a) at least 10 volume percent of tetrahydrofuran or N-nitrosodimethylamine or mixtures thereof; and (b) propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, dimethoxyethane, bis (2-ethoxy) ethyl ether, bis (2-methoxy) ethoxy-ethyl ether and mixtures thereof.
Claim 2
Dependent Claim
54 words
An electrolyte for use in active metal high potential electrochemical cells comprising an active metal salt dissolved in a non-aqueous solvent system comprising (a) at least 10 volume percent of tetrahydrofuran or N-nitrosodimethylamine or mixtures thereof; and (b) propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, dimethoxyethane, bis (2-ethoxy) ethyl ether, bis (2-methoxy) ethoxy-ethyl ether and mixtures thereof.
Claim 3
Dependent Claim
20 words
The electrolyte according to claim 1, wherein said solvent system includes up to 5 weight percent of a polymerization inhibitor.
Claim 4
Dependent Claim
40 words
The electrolyte according to claim 1, wherein said salt is selected from among salts of active metals, selected from the group consisting of lithium, sodium, potassium, beryllium, calcium, magnesium and aluminum with the haloacids, chlorates, perchlorates, tetrachloroaluminates, tetrafluoroborates, hexaflorophosphates, hexafluoroarsenates.
Claim 5
Dependent Claim
23 words
The electrolyte according to claim 1, wherein said solution of said active metal salts in said solvent is additionally saturated with sulfur dioxide.
Claim 6
Dependent Claim
19 words
The electrolyte according to claim 3, wherein said salt is present in a concentration in excess of 0.2 molar.
Claim 7
Dependent Claim
47 words
The electrolyte according to claim 1, wherein said solvent system is a binary solvent system essentially consisting of about 50 volume percent of a solvent selected from the group consisting of tetrahydrofuran and N-nitrosodimethylamine and the balance selected from the group of the individual solvents of (b).
Claim 8
Dependent Claim
59 words
The electrolyte according to claim 1, wherein said solvent system is a ternary solvent system consisting essentially of about 10 to about 50 volume percent of either tetrahydrofuran or N-nitrosodimethylamine, the remainder of the ternary system consisting of two components selected from the group of propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, dimethoxyethane, bis (2-ethoxy) ethyl ether, and bis (2-methoxy) ethoxy-ethyl ether.
Claim 9
Dependent Claim
58 words
The electrolyte according to claim 1, wherein said solvent system is a ternary solvent system consisting essentially of about 10 to about 50 volume percent of tetrahydrofuran and N-nitrosodimethylamine, the remainder of the ternary system consisting of a component selected from the group of propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, dimethoxyethane, bis (2-ethoxy) ethyl ether, and bis (2-methoxy) ethoxy-ethyl ether.
Claim 10
Dependent Claim
82 words
An electrochemical cell system for utilizing the electrolyte according to claim 1, wherein said electrode system is selected from the group consisting of Li/V 2 O 5 ; Li/MoO 3 ; Li/Ag 2 CrO 4 ; Li/HgCrO 4 ; Li/CuCrO 4 ; Li/MnO 2 ; Li/HgO; Li/PbO 2 ; Li/Ag 2 O 2 ; Li/CuO; and semi-fuel cells having lithium anodes and fuels selected from electrolyte soluble gaseous depolarizers from the group consisting of halogen, sulfur oxides, nitrogen oxides and hydrogen sulfide.
References Cited (Backward Citations)
US3493433A
Cited
US3468716A
Cited
US3542602A
Cited
US3511716A
Cited
US3567515A
Cited
US3658592A
Cited
US3769092A
Cited
US3681144A
Cited
US3681143A
Cited
US3796605A
Cited
US3796604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |