US4737422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric electrolytes
Assignee: UK Secretary of State for Defence
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Filing: 1985-08-21
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Granted: 1988-04-12
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Expires: 2005-08-21
Abstract
Abstract A polymeric electrolyte comprising a solution of an ionic salt in a polymer X having a bacbone of formula --A--B--, where A is an oligomeric chain and B is a chain extender group, attached to oligomer A, containing one or more linkage atoms Z selected from Si, C and P, wherein the polymer contains oxymethylene units which are present in one or more of the polymer backbone, sidechains or crosslinks, such that where A is an oxyethylene oligomer of formula --CH 2 CH 2 --O) n , n is an integer from 3 to 10 and where the oxyethylene oligomer is contained in a sidechain or crosslink attached at B, n is from 2 to 25.
Inventors
- 👤 John Knight
- 👤 Colin Booth
- 👤 Richard H. Mobbs
- 👤 John R. Owen
- 👤 Jeremy R. M. Giles
- 👤 John R. Craven
- 👤 Ian E. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/336; C08G65/337; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
151 words
A polymeric electrolyte characterized in that it comprises a solution of an ionic salt in a polymer X having a backbone of formula --A--B--, where A is an oligomeric chain and B is a chain extender group attached to oligomer A, containing one or more linkage atoms Z selected from the class consisting of silicon, carbon present as one or more --CH 2 O-- groups, and phosphorus present as one or more ═PO or ═P(R 1 )O groups where R 1 is C 1-20 alkyl, wherein the polymer contains units which are present in one or more of the polymeric backbone, sidechains or crosslinks, such that, when A is an oxyethylene oligomer of formula --CH 2 CH 2 O) n n is an integer from 3 to 10, and where the oxyethylene oligomer is contained in a sidechain or crosslink attached at B, n is an integer from 2 to 25.
Claim 2
Dependent Claim
151 words
A polymeric electrolyte characterized in that it comprises a solution of an ionic salt in a polymer X having a backbone of formula --A--B--, where A is an oligomeric chain and B is a chain extender group attached to oligomer A, containing one or more linkage atoms Z selected from the class consisting of silicon, carbon present as one or more --CH 2 O-- groups, and phosphorus present as one or more ═PO or ═P(R 1 )O groups where R 1 is C 1-20 alkyl, wherein the polymer contains units which are present in one or more of the polymeric backbone, sidechains or crosslinks, such that, when A is an oxyethylene oligomer of formula --CH 2 CH 2 O) n n is an integer from 3 to 10, and where the oxyethylene oligomer is contained in a sidechain or crosslink attached at B, n is an integer from 2 to 25.
Claim 3
Dependent Claim
41 words
A polymeric electrolyte as claimed in claim 1 characterized in that A in the polymer backbone is --CH 2 CH 2 O) n , where n is an integer from 3 to 10 and B is as defined in claim 1.
Claim 4
Dependent Claim
27 words
A polymeric electrolyte as claimed in claim 1 characterized in that the polymer is crosslinked by a group comprising --A--B) x A-- where x is an integer.
Claim 5
Dependent Claim
20 words
A polymeric electrolyte according to claim 1 characterized in that the average value of n is from 3 to 10.
Claim 6
Dependent Claim
27 words
A polymeric electrolyte as claimed in claim 1 characterized in that the number of units --A--B-- in each molecule of polymer is on average more than 3.
Claim 7
Dependent Claim
22 words
A polymeric electrolyte as claimed in claim 1, characterized in that the polymer has an average molecular weight of more than 1000.
Claim 8
Dependent Claim
22 words
A polymeric electrolyte as claimed in claim 6 characterized in that the polymer has an average molecular weight of more than 10,000.
Claim 9
Dependent Claim
21 words
A polymeric electrolyte according to claim 7 characterized in that the polymer has an average molecular weight of more than 100,000.
Claim 10
Dependent Claim
18 words
A polymeric electrolyte according to claim 1 characterized in that B contains at least one oxygen linking atom.
Claim 11
Dependent Claim
41 words
A polymeric electrolyte as claimed in claim 9 characterized in that Z is Si and at least one of the groups B in each polymer chain is of the formula --(Si(CH 3 ) 2 --O--)-- or --(Si(CH 2 CH 3 )--O--)--.
Claim 12
Dependent Claim
24 words
A polymeric electrolyte as claimed in claim 10 characterized in that the average value of n is 3 or greater, but less than 5.7.
Claim 13
Dependent Claim
25 words
A polymeric electrolyte as claimed in claim 10 or 11, wherein the polymer X is a reaction product of poly (ethylene glycol) ("PEG") and trichloromonomethylsilane.
Claim 14
Dependent Claim
22 words
A polymeric electrolyte as claimed in claim 10 or 11, wherein the polymer X is a reaction product of PEG and dichlorodimethylsilane.
Claim 15
Dependent Claim
23 words
A polymeric electrolyte as claimed in claim 10 or 11, wherein the polymer X is a reaction product of PEG, dichlorodimethylailane and trichloromonomethylsilane.
Claim 16
Dependent Claim
20 words
A polymeric electrolyte as claimed in claim 1 wherein the polymer X is a reaction product of PEG and dibromomethane.
Claim 17
Dependent Claim
24 words
A polymeric electrolyte as claimed in claim 1 wherein the polymer X is a reaction product of PEG and phosphoryl chloride or ethyl phosphoro-dichloridate.
Claim 18
Dependent Claim
34 words
A polymeric electrolyte as claimed in claim 1 characterized in that the molar ratio of the ionic salt to the groups --(CH 2 CH 2 O)-- in the electrolyte is from 1:4 to 1:30.
Claim 19
Dependent Claim
124 words
A polymeric electrolyte as claimed in claim 1 characterized in that the cation of the ionic salt is selected from the group consisting of Li + , Na + , Ca 2+ , NH 4 + , Mg 2+ , and the anion of the ionic salt is selected from the group consisting of I - , ClO 4 - , BF 4 - , AsF 6 - , PF 6 - , SCN - , CF 3 SO 3 - , CF 3 CO 2 - , CF 3 CF 2 COO - , CF 3 (CF 2 ) 6 SO 3 - , and BJ 4 - where J is C 6 H 5 , an alkyl chain or an aryl group.
Claim 20
Dependent Claim
30 words
An electrolytic cell comprising an anode, a cathode, and a polymeric electrolyte between the anode and the cathode, wherein the electrolyte comprises a polymeric electrolyte as claimed in claim 1.
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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) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |