US4471037A
Expired / Lapsed
US
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Solid state electrochemical cell
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1983-04-05
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Granted: 1984-09-11
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Expires: 2003-04-05
Abstract
Abstract A solid state electrochemical cell comprises an anode having Li as its active material, a cathode and an electrolyte comprising a complex of a polyether with lithium. The polyether is atactic, has a low glass transition temperature and is capable of forming a complex with Li + ions but not with Na + ions. An example of such a polyether is polyvinyl methyl ether. The complex may be blended with another polymer such as a poly (ethylene oxide) - LiClO 4 complex to improve mechanical properties for fabrication into the electrolyte.
Inventors
- 👤 Dennis J. Bannister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
61 words
A solid state electrochemical cell comprising an anode having lithium as its active material, a cathode and an electrolyte comprising a complex of a polyether with lithium, the polyether being an atactic polyether having a glass transition temperature of substantially less than 0° C. and being capable of forming a complex with Li + ions but not with Na + ions.
Claim 2
Dependent Claim
61 words
A solid state electrochemical cell comprising an anode having lithium as its active material, a cathode and an electrolyte comprising a complex of a polyether with lithium, the polyether being an atactic polyether having a glass transition temperature of substantially less than 0° C. and being capable of forming a complex with Li + ions but not with Na + ions.
Claim 3
Dependent Claim
17 words
A solid state electrochemical cell as claimed in claim 1 wherein the polyether is polyvinyl methyl ether.
Claim 4
Dependent Claim
26 words
A solid state electrochemical cell as claimed in claim 1 wherein the polyether is blended with another polymer for improving the mechanical properties of the polyether.
Claim 5
Dependent Claim
17 words
A solid state electrochemical cell as claimed in claim 3 wherein the other polymer is poly(ethylene oxide).
Claim 6
Dependent Claim
34 words
A solid state electrochemical cell as claimed in claim 4 wherein the electrolyte comprises a complex of polyvinyl methyl ether with LiClO 4 blended with a complex of poly(ethylene oxide) with LiClO 4 .
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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |