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Patent US4252876A successfully refreshed from Google Patents.
US4252876A
Expired / Lapsed
US
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Lithium battery
Assignee: Eic Corp
•
Filing: 1979-07-02
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Granted: 1981-02-24
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Expires: 1999-07-02
Abstract
Abstract An electrolyte for a rechargeable electrochemical cell featuring diethylether, a cosolvent, and a lithium salt.
Inventors
- 👤 Victor R. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:01
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0566; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
80 words
A rechargable electrochemical cell comprising a lithium-containing electrode and an electrolyte, said electrolyte comprising: diethyl ether, a cosolvent, and a lithium salt, wherein said diethyl ether and said cosolvent are present in proportional amounts greater than or equal to 70 percent and 5 percent by volume, respectively, said amounts being selected to produce an increase in conductivity compared to that of pure diethyl ether proportionally equal to or greater than any decrease in cycling efficiency compared to pure diethyl ether.
Claim 2
Dependent Claim
80 words
A rechargable electrochemical cell comprising a lithium-containing electrode and an electrolyte, said electrolyte comprising: diethyl ether, a cosolvent, and a lithium salt, wherein said diethyl ether and said cosolvent are present in proportional amounts greater than or equal to 70 percent and 5 percent by volume, respectively, said amounts being selected to produce an increase in conductivity compared to that of pure diethyl ether proportionally equal to or greater than any decrease in cycling efficiency compared to pure diethyl ether.
Claim 3
Dependent Claim
24 words
The cell of claim 1 wherein said cosolvent is present in an amount which does not decrease cycling efficiency compared to pure diethyl ether.
Claim 4
Dependent Claim
22 words
The cell of claim 2 wherein said cosolvent is present in an amount which increases cycling efficiency compared to pure diethyl ether.
Claim 5
Dependent Claim
12 words
The cell of claim 1 wherein said cosolvent comprises a saturated compound.
Claim 6
Dependent Claim
13 words
The cell of claim 4 wherein said saturated compound comprises a saturated ether.
Claim 7
Dependent Claim
12 words
The cell of claim 5 wherein said saturated either consists of tetrahydrofuran.
Claim 8
Dependent Claim
12 words
The cell of claim 5 wherein said saturated ether consists of dimethoxyethane.
Claim 9
Dependent Claim
13 words
The cell of claim 5 wherein said saturated ether consists of 1, 3-dioxolane.
Claim 10
Dependent Claim
12 words
The cell of claim 5 wherein said saturated ether consists of dimethylether.
Claim 11
Dependent Claim
14 words
The cell of claim 5 wherein said saturated ether consists of ethyl tetrahydrofurfuryl ether.
Claim 12
Dependent Claim
12 words
The cell of claim 1 wherein said cosolvent comprises an unsaturated compound.
Claim 13
Dependent Claim
11 words
The cell of claim 1 wherein said cosolvent comprises a furan.
Claim 14
Dependent Claim
12 words
The cell of claim 11 wherein said unsaturated compound consists of 2-methylfuran.
Claim 15
Dependent Claim
12 words
The cell of claim 11 wherein said unsaturated compound consists of 2,5-dimethylfuran.
Claim 16
Dependent Claim
12 words
The cell of claim 11 wherein said unsaturated compound consists of N-methylpyrrole.
Claim 17
Dependent Claim
14 words
The cell of claim 11 wherein said unsaturated compound consists of 3, 5- dimethylisoxazole.
Claim 18
Dependent Claim
10 words
The cell of claim 1, further comprising a second cosolvent.
Claim 19
Dependent Claim
14 words
The cell of claim 17 wherein said second cosolvent consists of a saturated ether.
Claim 20
Dependent Claim
28 words
The cell of either of claims 1 or 17 wherein said lithium salt is present in a concentration sufficient to prevent the separation of said electrolyte into layers.
Claim 21
Dependent Claim
23 words
The cell of claim 1 wherein said diethyl ether is present in a proportional amount equal to or greater than 80% by volume.
Claim 22
Dependent Claim
23 words
The cell of claim 1 wherein said diethyl ether is present in a proportional amount equal to or greater than 90% by volume.
Claim 23
Dependent Claim
35 words
The cell of claim 6 wherein said diethyl ether is present in a proportional amount equal to or greater than 90%, and said tetrahydrofuran is present in an amount equal to or less than 10%.
Claim 24
Dependent Claim
14 words
The cell of claim 1 wherein said lithium salt consists of LiAsF 6 .
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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 |