US4371592A
Expired / Lapsed
US
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Primary cell of high energy density in which the anode active material is an alkali metal
Assignee: Gipelec SA
•
Filing: 1981-03-16
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Granted: 1983-02-01
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Expires: 2001-03-16
Abstract
Abstract A primary cell of high specific energy in which the anode active material (16) is an alkali metal and the cathode active material is sulphur oxychloride which simultaneously acts as an electrolyte solvent, said electrolyte further containing a dissolved salt and a co-solvent. The co-solvent is chosen from among phosphoryl chloride and benzoyl chloride; the dissolved salt is lithium tetrachloroaluminate.
Inventors
- 👤 Jean-Paul Gabano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:41
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A cell of high specific energy in which the anode active material is an alkali metal and the cathode active material is sulphur oxychloride which simultaneously acts as an electrolyte solvent, said electrolyte further containing a dissolved salt and a co-solvent whose reduction potential relative to said alkali metal is less than the reduction potential of sulphur dioxide, wherein the proportions (by volume) of the co-solvent relative to the solvent and co-solvent mixture lie between 32% and 43%, so as to obtain, in the discharge curves (voltage as a function of the discharge capacity) a second perceptible discharge plateau at the level of the reduction potential of sulphur dioxide.
Claim 2
Dependent Claim
109 words
A cell of high specific energy in which the anode active material is an alkali metal and the cathode active material is sulphur oxychloride which simultaneously acts as an electrolyte solvent, said electrolyte further containing a dissolved salt and a co-solvent whose reduction potential relative to said alkali metal is less than the reduction potential of sulphur dioxide, wherein the proportions (by volume) of the co-solvent relative to the solvent and co-solvent mixture lie between 32% and 43%, so as to obtain, in the discharge curves (voltage as a function of the discharge capacity) a second perceptible discharge plateau at the level of the reduction potential of sulphur dioxide.
Claim 3
Dependent Claim
12 words
A cell according to claim 1, wherein the alkali metal is lithium.
Claim 4
Dependent Claim
14 words
A cell according to claim 1, wherein the proportion of the co-solvent is 40%.
Claim 5
Dependent Claim
12 words
A cell according to claim 1, wherein said solvent is thionyl chloride.
Claim 6
Dependent Claim
12 words
A cell according to claim 1, wherein said solvent is sulphuryl chloride.
Claim 7
Dependent Claim
12 words
A cell according to claim 1, wherein said co-solvent is phosphoryl chloride.
Claim 8
Dependent Claim
12 words
A cell according to claim 1, wherein said co-solvent is benzoyl chloride.
Claim 9
Dependent Claim
24 words
A cell according to claim 1, wherein said dissolved salt is chosen from the group including lithium tetrachloroaluminate and lithium hexachloroantimoniate (SbCl 6 Li).
Claim 10
Dependent Claim
24 words
A primary cell according to claim 7, wherein the dissolved salt is lithium tetrachloroaluminate at a concentration of 0.8 to 1.5 moles per liter.
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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |