Patent US5415959A successfully refreshed from Google Patents.
US5415959A
Expired / Lapsed
US
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Woven synthetic halogenated polymer fibers as separator material for electrochemical cells
Assignee: Electrochem Solutions Inc
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Filing: 1993-10-29
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Granted: 1995-05-16
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Expires: 2013-10-29
Abstract
Abstract A fabric separator woven from synthetic halogenated polymeric fibers for use in an electrochemical cell comprising a Group IA, IIA and IIIB metal anode and a depolarizer/catholyte or a solid cathode/electrolyte system, is described. The separator is resistant to the highly oxidizing components present in the cell, is tear resistant and has a reduced thickness to minimize the diminishing effect of the separator on the volumetric amount of active components in the cell. The separator can be used by itself or as a laminate with a microporous film, preferably made of a fluoropolymeric fiber.
Inventors
- 👤 Michael F. Pyszczek
- 👤 Christine A. Frysz
- 👤 Steven J. Ebel
- 👤 Esther S. Takeuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:10
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/414; H01M50/426; H01M50/489; H01M50/494; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
An electrochemical cell comprising: a) an anode body of alkali metal; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode; and d) a separator provided between the anode and the cathode to prevent internal electrical short circuit conditions, wherein the separator comprises a laminate of a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene,. and a continuous microporous film.
Claim 2
Dependent Claim
84 words
An electrochemical cell comprising: a) an anode body of alkali metal; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode; and d) a separator provided between the anode and the cathode to prevent internal electrical short circuit conditions, wherein the separator comprises a laminate of a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene,. and a continuous microporous film.
Claim 3
Dependent Claim
15 words
The electrochemical cell of claim 1 wherein the continuous microporous film comprises a fluoropolymeric material.
Claim 4
Dependent Claim
13 words
The electrochemical cell of claim 1 wherein the continuous microporous film comprises polyethylenetetrafluoroethylene.
Claim 5
Dependent Claim
25 words
The electrochemical cell of claim 1 wherein the anode is selected from the group consisting of lithium, a lithium alloy, sodium, potassium, calcium and magnesium.
Claim 6
Dependent Claim
39 words
The electrochemical cell of claim 1 wherein the cathode is made of a solid material selected from the group consisting of manganese dioxide, fluorinated carbon, silver vanadium oxide, titanium disulfide, copper oxide, copper sulfide, iron sulfide and iron disulfide.
Claim 7
Dependent Claim
51 words
The electrochemical cell of claim 1 wherein the cathode comprises a liquid selected from the group consisting of sulfur dioxide and an oxyhalide including phosphoryl chloride, thionyl chloride and sulfuryl chloride used individually or in combination with each other or in combination with halogens, interhalogens or other electrochemical promoters or stabilizers.
Claim 8
Dependent Claim
34 words
The electrochemical cell of claim 1 wherein the cathode comprises a carbonaceous material with the continuous microporous film of the laminate separator facing the cathode to provide a barrier to any dislodged carbon particles.
Claim 9
Dependent Claim
43 words
The electrochemical cell of claim 1 wherein the anode comprises lithium, the cathode comprises a carbonaceous material, the electrolyte comprises bromine trifluoride and the continuous microporous film of the laminate separator faces the cathode to provide a barrier to any dislodged carbon particles.
Claim 10
Dependent Claim
79 words
An electrochemical cell comprising: a) a lithium anode; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode, the electrolyte comprising bromine trifluoride; and d) a separator provided between the anode and the cathode to prevent internal electrical short circuit conditions, the separator comprising a fabric woven from a fluoropolymeric fiber selected from one of the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 11
Dependent Claim
79 words
An electrochemical cell comprising: a) a lithium anode; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode, the electrolyte comprising bromine trifluoride; and d) a separator provided between the anode and the cathode to prevent internal electrical short circuit conditions, the separator comprising a fabric woven from a fluoropolymeric fiber selected from one of the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 12
Dependent Claim
20 words
The electrochemical cell of claim 9 wherein the separator comprises a laminate of the woven fabric and a microporous film.
Claim 13
Dependent Claim
14 words
The electrochemical cell of claim 10 wherein the microporous film comprises a fluoropolymeric material.
Claim 14
Dependent Claim
12 words
The electrochemical cell of claim 10 wherein the microporous film comprises polyethylenetetrafluoroethylene.
Claim 15
Dependent Claim
34 words
The electrochemical cell of claim 29 wherein the cathode comprises a carbonaceous material with the continuous microporous film of the laminate separator facing the cathode to provide a barrier to any dislodged carbon particles.
Claim 16
Dependent Claim
76 words
An electrochemical cell comprising: a) an anode body of alkali metal; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode; and d) a separator provided between the anode and the cathode wherein to prevent internal electrical short circuit conditions, the separator comprises a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 17
Dependent Claim
76 words
An electrochemical cell comprising: a) an anode body of alkali metal; b) a cathode operatively associated with the anode and made of electronically conductive material; c) an electrolyte operatively associated with the anode and the cathode; and d) a separator provided between the anode and the cathode wherein to prevent internal electrical short circuit conditions, the separator comprises a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 18
Dependent Claim
25 words
The electrochemical cell of claim 14 wherein the anode is selected from the group consisting of lithium, a lithium alloy, sodium, potassium, calcium and magnesium.
Claim 19
Dependent Claim
39 words
The electrochemical cell of claim 14 wherein the cathode is made of a solid material selected from the group consisting of manganese dioxide, fluorinated carbon, silver vanadium oxide, titanium disulfide, copper oxide, copper sulfide, iron sulfide and iron disulfide.
Claim 20
Dependent Claim
51 words
The electrochemical cell of claim 14 wherein the cathode comprises a liquid selected from the group consisting of sulfur dioxide and an oxyhalide including phosphoryl chloride, thionyl chloride and sulfuryl chloride used individually or in combination with each other or in combination with halogens, interhalogens or other electrochemical promoters or stabilizers.
Claim 21
Dependent Claim
64 words
A separator for use in an electrochemical cell, the cell comprising an alkali metal anode, an operatively associated cathode and an electrolyte, wherein the separator is provided between the anode and the cathode to prevent internal electrical short circuit conditions, the improvement in the separator comprising: a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 22
Dependent Claim
64 words
A separator for use in an electrochemical cell, the cell comprising an alkali metal anode, an operatively associated cathode and an electrolyte, wherein the separator is provided between the anode and the cathode to prevent internal electrical short circuit conditions, the improvement in the separator comprising: a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 23
Dependent Claim
38 words
The separator of claim 18 wherein the cathode is prevented from physically contacting the anode by the woven fabric separator, the anode being selected from the group consisting of lithium, a lithium alloy, sodium, potassium, calcium and magnesium.
Claim 24
Dependent Claim
53 words
The separator of claim.1 wherein the anode is prevented from physically contacting the cathode by the woven fabric separator, the cathode being made of a solid material that is selected from the group consisting of manganese dioxide, fluorinated carbon, silver vanadium oxide, titanium disulfide, copper oxide, copper sulfide, iron sulfide and iron disulfide.
Claim 25
Dependent Claim
64 words
The separator of claim 1 wherein the anode is prevented from physically contacting the cathode by the woven fabric separator, the cathode comprising a liquid selected from the group consisting of sulfur dioxide and an oxyhalide including phosphoryl chloride, thionyl chloride and sulfuryl chloride used individually or in combination with each other or in combination with halogens, interhalogens or other electrochemical promoters or stabilizers.
Claim 26
Dependent Claim
63 words
A separator for use in an electrochemical cell, the cell comprising a lithium anode, an operatively associated cathode and an electrolyte, wherein the separator is provided between the anode and the cathode to prevent internal electrical short circuit conditions, the improvement in the separator comprising: a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 27
Dependent Claim
63 words
A separator for use in an electrochemical cell, the cell comprising a lithium anode, an operatively associated cathode and an electrolyte, wherein the separator is provided between the anode and the cathode to prevent internal electrical short circuit conditions, the improvement in the separator comprising: a fabric woven from a fluoropolymeric fiber selected from the group consisting of polyvinylidine fluoride, polyethylenetetrafluoroethylene, and polyethylenechlorotrifluoroethylene.
Claim 28
Dependent Claim
56 words
The separator of cell of claim 7 wherein the anode is prevented from physically contacting the cathode by the woven fabric separator, the cathode being made of a solid material that is selected from the group consisting of manganese dioxide, fluorinated carbon, silver vanadium oxide, titanium disulfide, copper oxide, copper sulfide, iron sulfide and iron disulfide.
Claim 29
Dependent Claim
65 words
The separator of claim 7 wherein the anode is prevented from physically contacting the cathode by the woven fabric separator, the cathode comprising a liquid catholyte selected from the group consisting of sulfur dioxide and an oxyhalide including phosphoryl chloride, thionyl chloride and sulfuryl chloride used individually or in combination with each other or in combination with halogens, interhalogens or other electrochemical promoters or stabilizers.
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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) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |