US4252875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-catalysts for the cathode(s) to enhance its activity to reduce SoCl2 in Li/SoCl2 battery
Assignee: Northrop Grumman Innovation Systems LLC
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Filing: 1980-04-14
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Granted: 1981-02-24
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Expires: 2000-04-14
Abstract
Abstract In a lithium-thionyl chloride cell having a lithium anode, an electrolyte including thionyl chloride and a cathode with current collector, the improvement comprising a coating of a metal phthalocyanine complex on a said cathode. Particularly preferred are transition metal phthalocyanine complexes, such as copper and cobalt phthalocyanine.
Inventors
- 👤 Hanumanthiya V. Venkatasetty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
In a lithium-thionyl chloride cell having a lithium anode, and electrolyte include thionyl chloride, and a cathode, the improvement comprising a coating of phthalocyanine complex on said cathode.
Claim 2
Dependent Claim
28 words
In a lithium-thionyl chloride cell having a lithium anode, and electrolyte include thionyl chloride, and a cathode, the improvement comprising a coating of phthalocyanine complex on said cathode.
Claim 3
Dependent Claim
15 words
The cell of claim 1 wherein said phthalocyanine complex is a transition metal phthalocyanine complex.
Claim 4
Dependent Claim
15 words
The cell of claim 2 wherein said transition metal is selected from copper and cobalt.
Claim 5
Dependent Claim
11 words
The cell of claim 1 wherein said cathode is a metal.
Claim 6
Dependent Claim
20 words
The cell of claim 4 wherein said metal is selected from the group consisting of platinum, nickel and stainless steel.
Claim 7
Dependent Claim
10 words
The cell of claim 1 wherein said cathode is carbon.
Claim 8
Dependent Claim
32 words
The cell of claim 1 wherein said complex is applied to said cathode by vacuum drying a cathode which has been contacted with a solution of metal complex dissolved in a solvent.
Claim 9
Dependent Claim
17 words
The cell of claim 7 wherein said solution contains 2% to 10% by weight of said complex.
Claim 10
Dependent Claim
21 words
The cell of claim 8 wherein said solvent is selected from the group consisting of tetrahydrofuran, dimethylformamide, trichloroethylene, acetonitrile, and nitromethane.
Claim 11
Dependent Claim
23 words
The cell of claim 9 wherein said phthalocyanine complex is a transition metal complex selected from the group consisting of copper and cobalt.
References Cited (Backward Citations)
US4093784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |