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US4629666A
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Separators for electrochemical cells
Assignee: Duracell Inc USA
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Filing: 1985-11-22
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Granted: 1986-12-16
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Expires: 2005-11-22
Abstract
Abstract This invention pertains to separators for electrochemical cells. These separators are best suited for electrochemical cells which contain reactive metals such as lithium and strong oxidants. It has been discovered that a certain class of partially halogenated hydrocarbons will stand up to these materials without degrading.
Inventors
- 👤 Carl R. Schlaikjer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:20
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M2300/00; H01M2300/0017; H01M2300/002
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
90 words
An electrochemical cell comprising a container having two electrically isolated terminals; the container having therein an anode connected to one terminal, a cathode connected to the other terminal, a fluid electrolyte, an ionizable solute dissolved in said electrolyte, and a separator positioned between and in contact with the anode and the cathode; wherein the separator is characterized by being a substantially continuous microporous film comprising a polymer that is a copolymer of ethylene and a fully halogenated analogue of ethylene having the following formula: ##STR2## where the X's are halogens.
Claim 2
Dependent Claim
90 words
An electrochemical cell comprising a container having two electrically isolated terminals; the container having therein an anode connected to one terminal, a cathode connected to the other terminal, a fluid electrolyte, an ionizable solute dissolved in said electrolyte, and a separator positioned between and in contact with the anode and the cathode; wherein the separator is characterized by being a substantially continuous microporous film comprising a polymer that is a copolymer of ethylene and a fully halogenated analogue of ethylene having the following formula: ##STR2## where the X's are halogens.
Claim 3
Dependent Claim
19 words
The cell recited in claim 1 wherein the halogens are selected from the group consisting of chlorine and fluorine.
Claim 4
Dependent Claim
16 words
The cell recited in claim 2 wherein the fluid electrolyte is comprised of a liquid depolarizer.
Claim 5
Dependent Claim
78 words
The cell recited in claim 2 wherein the fluid electrolyte comprises a solvent or material selected from the group consisting of SO 2 , SOCl 2 , SO 2 Cl 2 , S 2 O 5 Cl 2 , SO 3 , POCl 3 , P 2 O 3 Cl 4 , SeOCl 2 , CrO 2 Cl 2 , VOCl 3 , CSCl 2 , CH 3 CClO, Si 2 OCl 6 , and Cl 2 .
Claim 6
Dependent Claim
11 words
The cell recited in claim 4 wherein the X's represent fluorine.
Claim 7
Dependent Claim
19 words
The cell recited in claim 4 wherein 3 of the X's represent fluorine and the fourth X is chlorine.
Claim 8
Dependent Claim
21 words
The cell recited in claim 4 wherein the anode is comprised of an alkali or alkaline earth metal or mixtures thereof.
Claim 9
Dependent Claim
13 words
The cell recited in claim 4 wherein the anode is comprised of lithium.
Claim 10
Dependent Claim
87 words
An electrochemical cell comprising a container having two electrically isolated terminals; the container having therein an anode connected to one terminal, a cathode connected to the other terminal, a fluid electrolyte, an ionizable solute dissolved in said electrolyte, and a separator positioned between the anode and the cathode; wherein the separator is characterized by being a microporous film that is fabricated from a polymer having a repeating formula of alternating units of (CF 2 CFX) and (CH 2 CH 2 ) where X is fluorine or chlorine.
Claim 11
Dependent Claim
87 words
An electrochemical cell comprising a container having two electrically isolated terminals; the container having therein an anode connected to one terminal, a cathode connected to the other terminal, a fluid electrolyte, an ionizable solute dissolved in said electrolyte, and a separator positioned between the anode and the cathode; wherein the separator is characterized by being a microporous film that is fabricated from a polymer having a repeating formula of alternating units of (CF 2 CFX) and (CH 2 CH 2 ) where X is fluorine or chlorine.
Claim 12
Dependent Claim
73 words
The cell recited in claim 9 wherein the fluid electrolyte contains a solvent selected from the group consisting of SO 2 , SOCl 2 , SO 2 Cl 2 , S 2 O 5 Cl 2 , SO 3 , POCl 3 , P 2 O 3 Cl 4 , SeOCl 2 , CrO 2 Cl 2 , VOCl 3 , CSCl 2 , CH 3 CClO, and Si 2 OCl 6 .
Claim 13
Dependent Claim
31 words
The cell recited in claim 9 wherein the fluid electrolyte is comprised of SOCl 2 , the solute is comprised of LiAlCl 4 , and the anode is comprised of lithium.
Claim 14
Dependent Claim
31 words
The cell recited in claim 9 wherein the fluid electrolyte is comprised of SO 2 , the solute is comprised of LiAlCl 4 , and the anode is comprised of lithium.
References Cited (Backward Citations)
US4508800A
Cited
US4513067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |