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US4886716A
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Solid polymeric electrolyte and electrochemical generators containing it
Assignee: Eni Tecnologie SpA
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Filing: 1988-10-06
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Granted: 1989-12-12
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Expires: 2008-10-06
Abstract
Abstract A solid polymeric electrolyte is constituted by a solid solution of an ionic compound in a cross-linked polyether, wherein this latter is the copolymerization product of a vinyl-ether of formula: R--(O--CH.sub.2 --CH.sub.2).sub.n --O--CH═CH.sub.2 (I) wherein: R is the methyl or ehtyl radical; and n is an integer comprised within the range of from 1 to 16; with a di-vinyl-ether of formula: CH.sub.2 ═CH--(O--CH.sub.2 --CH.sub.2).sub.m --O--CH═CH.sub.2(II) wherein: m is an integer comprised within the range of from 1 to 16; with a molar ratio of the di-vinyl-ether (II) to the vinyl-ether (I) comprised within the range of from 1/100 to 10/100; with said polyether having a weight average molecular weight of about 10,000, and a glass transition temperature (T g ) comprised within the range of from --60° C. to --80° C. Such a solid polymeric electrolyte is used in the manufacturing of high-energy-density electrochemical generators.
Inventors
- 👤 Arnaldo Roggero
- 👤 Bruno Scrosati
- 👤 Maria Andrei
- 👤 Stefano Passerini
- 👤 Ugo Pedretti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:31
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1523; G02F1/1525; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; H01B1/124; H01B1/125; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
Solid polymeric electrolyte, constituted by a solid solution of an ionic compound dissolved in a polyether, characterized in that said polyether is a solid and cross-linked polyether obtained by means of the copolymerization of a vinyl-ether of formula: R--(O--CH.sub.2 --CH.sub.2).sub.n --O--CH═CH.sub.2 (I) wherein: R is the methyl or ethyl radical; and n is an integer comprised within the range of from 1 to 16; with a di-vinyl-ether of formula: CH.sub.2 ═CH--(O--CH.sub.2 --CH.sub.2).sub.m --O--CH═CH.sub.2 (II) wherein: m is an integer comprised within the range of from 1 to 16; with a molar ratio of the di-vinyl-ether (II) to the vinyl-ether (I) comprised within the range of from 1/100 to 10/100; with said polyether having a weight average molecular weight of about 10,000, and a glass transition temperature (T g ) comprised within the range of from -60° C. to -80° C.
Claim 2
Dependent Claim
140 words
Solid polymeric electrolyte, constituted by a solid solution of an ionic compound dissolved in a polyether, characterized in that said polyether is a solid and cross-linked polyether obtained by means of the copolymerization of a vinyl-ether of formula: R--(O--CH.sub.2 --CH.sub.2).sub.n --O--CH═CH.sub.2 (I) wherein: R is the methyl or ethyl radical; and n is an integer comprised within the range of from 1 to 16; with a di-vinyl-ether of formula: CH.sub.2 ═CH--(O--CH.sub.2 --CH.sub.2).sub.m --O--CH═CH.sub.2 (II) wherein: m is an integer comprised within the range of from 1 to 16; with a molar ratio of the di-vinyl-ether (II) to the vinyl-ether (I) comprised within the range of from 1/100 to 10/100; with said polyether having a weight average molecular weight of about 10,000, and a glass transition temperature (T g ) comprised within the range of from -60° C. to -80° C.
Claim 3
Dependent Claim
49 words
Solid polymeric electrolyte according to claim 1, characterized in that in the above formulae (I) and (II) R represents the methyl radical, m is an integer comprised within the range of from 1 to 6, and n is an integer comprised within the range of from 1 to 6.
Claim 4
Dependent Claim
55 words
Solid polymeric electrolyte according to claim 1, characterized in that in the copolymerization, molar ratios of the di-vinyl-ether (II) to the vinyl-ether (I) comprised within the ratio of from 1/100 to 3/100 are preferably used, and the cross-linked polyether has values of weight average molecular weight comprised within the range of from 20,000 to 100,000.
Claim 5
Dependent Claim
65 words
Solid polymeric electrolyte according to claim 1, characterized in that it contains an ionic compound selected from perchlorates, borates, fluoborates, thiocyanates, trifluoroacetates and trifluoromethanesulphonates of metals lithium, sodium, potassium, calcium, copper, zinc, magnesium, lead, tin and aluminum, in such an amount as to have an atomic ratio of the polyether oxygen to the metal comprised within the range of from about 4/1 to about 12/1.
Claim 6
Dependent Claim
17 words
Solid polymeric electrolyte according to claim 4, characterized in that said ionic compound is a lithium compound.
Claim 7
Dependent Claim
16 words
Solid polymeric electrolyte according to claim 5, characterized in that said lithium compound is lithium perchlorate.
Claim 8
Dependent Claim
31 words
Solid polymeric electrolyte according to claim 1, characterized in that it is in the form of a membrane having a thickness comprised within the range of from 50 to 200 microns.
Claim 9
Dependent Claim
18 words
An electrolytic generator, incorporating the solid electrolytic polymer of claims 1, 2, 3, 4, 5, 6, or 7.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |