Patent US4818643A successfully refreshed from Google Patents.
US4818643A
Expired / Lapsed
US
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Materials for electrical devices
Assignee: RAYCOM Ltd A Co OF UNITED KINGDOM
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Filing: 1986-12-17
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Granted: 1989-04-04
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Expires: 2006-12-17
Abstract
Abstract Melt-extruded polymeric electrolyte material for electrochemical power cells may be coextruded with other components of the cell, notably a lithium metal anode.
Inventors
- 👤 John A. Cook
- 👤 George B. Park
- 👤 Robert H. McLoughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:17
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/07; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29L; B29L2031/00; B29L2031/30; B29L2031/3055; B29L2031/3061; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
A polymeric electrolyte material for use as an electrolyte in an electrochemical cell, comprising a blend of (a) an ionizable salt, (b) an extrudable organic polymer cpable of permitting sufficient transfer of dissociated ions of the salt so that the blend can function as an electrolyte in an electrochemical cell in the substantial absence of any liquid, and (c) a plasticizing agent which inhibits change in the morphology of the polymer from an amorphous phase to a crystalline phase.
Claim 2
Dependent Claim
79 words
A polymeric electrolyte material for use as an electrolyte in an electrochemical cell, comprising a blend of (a) an ionizable salt, (b) an extrudable organic polymer cpable of permitting sufficient transfer of dissociated ions of the salt so that the blend can function as an electrolyte in an electrochemical cell in the substantial absence of any liquid, and (c) a plasticizing agent which inhibits change in the morphology of the polymer from an amorphous phase to a crystalline phase.
Claim 3
Dependent Claim
20 words
A polymeric electrolyte material according to claim 1, wherein the plasticizing agent has a dielectric constrant of at least 15.
Claim 4
Dependent Claim
20 words
A polymeric electrolyte material according to claim 1, wherein the plasticizing agent has a dielectric constant of at least 30.
Claim 5
Dependent Claim
22 words
A polymeric electrolyte material according to claim 1, wherein the blend comprises between 5 and 60% by weight of the plasticizing agent.
Claim 6
Dependent Claim
22 words
A polymeric electrolyte material according to claim 1, wherein the blend comprises between 25 and 40% by weight of the plasticizing agent.
Claim 7
Dependent Claim
32 words
A polymeric electrolyte material according to claim 1, wherein the plasticizing agent is selected from the group consisting of propylene carbonate, ethylene carbonate, tetramethylene sulfone, gamma-butyrolactone, dimethylformamide, dioctyl phthalate, and dibutyl phthalate.
Claim 8
Dependent Claim
26 words
A polymeric electrolyte material according to claim 1, wherein the plasticizing agent is selected from the group consisting of propylene carbonate, ethylene carbonate, and tetramethylene sulfone.
Claim 9
Dependent Claim
15 words
A polymeric electrolyte material according to claim 1, wherein the ionizable salt is lithium trifluoromethanesulfonate.
Claim 10
Dependent Claim
93 words
A polymeric electrolyte material according to claim 1, wherein the polymer has the repeat unit ##STR4## wherein R is hydrogen or a group R a , -CH 2 OR a , -CH 2 OR e R a or -CH 2 N(CH 3 ) 2 and R" is R a or R e R a , R a being a C 1 to C 16 alkyl or cycloalkyl group and R e being an ether group of the formula -(CH 2 CH 2 O) p -where p is a number from 1 to 100.
Claim 11
Dependent Claim
14 words
A polymeric electrolyte material according to claim 1, wherein the polymer is poly(ethylene oxide).
References Cited (Backward Citations)
US4060673A
Cited
US4121022A
Cited
US4168352A
Cited
FR2442513A1
Cited
EP0145231A1
Cited
EP0146246A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |