US3864168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cells incorporating water scavengers
Assignee: Whittaker Technical Products Inc
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Filing: 1974-03-22
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Granted: 1975-02-04
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Expires: 1994-03-22
Abstract
Abstract An improved electrolytic cell comprises a metal anode such as lithium, sodium, zinc, or the like, a cathode such as monofluorographite or the like and an organic electrolyte such as propylene carbonate which contains an inorganic salt such as lithium perchlorate disposed between and in contact with the spaced electrodes. A particulate water scavenger is disposed in association with the electrolyte and/or at least one of the electrodes for the purpose of maintaining the water level of the electrolyte below that which interferes with the optimal electrical performance of the cell. In one embodiment, the scavenger comprises a porous sheet disposed on a surface of the anode and exposed to the electrolyte. In another embodiment, the scavenger is disposed within the cathode. Preferably, the scavenger comprises molecular sieve material, hydrophilic cellulosic material or the like.
Inventors
- 👤 Jr John E Casey
- 👤 Roland F Chireau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M6/00; H01M6/14; H01M6/16
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
60 words
AN IMPROVED ELECTROLYTIC CELL COMPRISING IN COMBINATION: A. A METALLIC ANODE; B. A CATHODE SPACED FROM SAID ANODE; C. AN ORGANIC SUBSTANTIALLY WATER-FREE ELECTROLYTE CONTAINING A DISSOLVED SALT CURRENT CARRIER DISPOSED BETWEEN AND IN CONTACT WITH BOTH OF SAID ELECTRODES, AND D. A PARTICULATE SOLID WATER SCAVENGER DISPOSED IN ASSOCIATION WITH AT LEAST ONE OF SAID ELECTRODES AND SAID ELECTROLYTE.
Claim 2
Dependent Claim
60 words
AN IMPROVED ELECTROLYTIC CELL COMPRISING IN COMBINATION: A. A METALLIC ANODE; B. A CATHODE SPACED FROM SAID ANODE; C. AN ORGANIC SUBSTANTIALLY WATER-FREE ELECTROLYTE CONTAINING A DISSOLVED SALT CURRENT CARRIER DISPOSED BETWEEN AND IN CONTACT WITH BOTH OF SAID ELECTRODES, AND D. A PARTICULATE SOLID WATER SCAVENGER DISPOSED IN ASSOCIATION WITH AT LEAST ONE OF SAID ELECTRODES AND SAID ELECTROLYTE.
Claim 3
Dependent Claim
25 words
The improved electrolytic cell of claim 1 wherein said scavenger comprises a porous sheet in contact with said electrolyte and one of the said electrodes.
Claim 4
Dependent Claim
20 words
The improved electrolytic cell of claim 2 wherein said sheet comprises particulate molecular sieve material disposed within a binder matrix.
Claim 5
Dependent Claim
46 words
The improved electrolytic cell of claim 3 wherein said sheet is approximately 4 - 10 mils thick, wherein said binder is present in a concentration in said sheet of about 20 -50% of weight of said sheet and wherein said molecular sieve material comprises synthetic zeolite.
Claim 6
Dependent Claim
21 words
The improved electrolytic cell of claim 3 wherein said sheet comprises organic fibers and is about 4 - 10 mils thick.
Claim 7
Dependent Claim
13 words
The improved electrolytic cell of claim 5 wherein said sheet comprises cross-linked carboxymethylcellulose.
Claim 8
Dependent Claim
14 words
The improved electrolytic cell of claim 5 wherein said sheet comprises uncrossed-linked ethyl cellulose.
Claim 9
Dependent Claim
19 words
The improved electrolytic cell of claim 1 wherein said scavenger is disposed within at least one of said electrodes.
Claim 10
Dependent Claim
20 words
The improved electrolytic cell of claim 8 wherein said scavenger comprises molecular sieve material and is disposed within said cathode.
Claim 11
Dependent Claim
31 words
The improved electrolytic cell of claim 9 wherein said sieve material comprises synthetic zeolite and is present in a concentration of at least of about 5% by weight of said cathode.
Claim 12
Dependent Claim
12 words
The improved electrolytic cell of claim 10 wherein said cathode comprises monofluorographite.
Claim 13
Dependent Claim
37 words
The improved electrolytic cell of claim 11 wherein said cathode includes acetylene black and polytetrafluoroethylene in a weight ratio, respectively, of about 10 and 5 to 75 parts of the monofluorographite and 10 parts of the scavenger.
Claim 14
Dependent Claim
21 words
The improved electrolytic cell of claim 12 wherein the particle size range of the scavenger is about 50 - 90 microns.
Claim 15
Dependent Claim
19 words
The improved electrolytic cell of claim 8 wherein said scavenger comprises organic fiber and is disposed within said cathode.
Claim 16
Dependent Claim
42 words
The improved electrolytic cell of claim 14 wherein said organic fiber comprises cellulosic fiber and is present in a concentration of at least about 1% by weight of said cathode and in a particle size range of about 50 - 90 microns.
Claim 17
Dependent Claim
22 words
The improved electrolytic cell of Claim 1 wherein said anode is lithium, said cathode is monofluorographite and said electrolyte is propylene carbonate.
Claim 18
Dependent Claim
23 words
The improved electrolytic cell of claim 1 wherein said anode is sodium, said cathode is chromium oxide and said electrolyte is ethylene carbonate.
Claim 19
Dependent Claim
22 words
The improved electrolytic cell of claim 1 wherein said anode is zinc, said cathode is copper chloride and the electrolyte is tetrahydrofuran.
Claim 20
Dependent Claim
22 words
The improved electrolytic cell of claim 1 wherein said anode is aluminum, said cathode is nickel chloride and said electrolyte is tetrahydropyran.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |