US5238758A
Expired / Lapsed
US
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Badiation cured solid electrolytes and electrochemical devices employing the same
Assignee: MHB Joint Venture
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Filing: 1991-10-15
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Granted: 1993-08-24
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Expires: 2011-10-15
Abstract
Abstract A method for forming an interpenetrating polymeric network containing a liquid electrolyte for use in solid state electrochemical cells which comprises forming a mixture of a liquid monomeric or prepolymeric radiation polymerizable, compound, a radiation inert ionically conducting liquid, and an ionizable alkaline metal salt; subjecting said mixture to actinic radiation to thereby crosslink said radiation polymerizable ionically conducting material and form a solid matrix containing said ionically conducting liquid; and electrode half elements and electrochemical cells incorporating said network.
Inventors
- 👤 Mei-Tsu Lee
- 👤 Dale R. Shackle
- 👤 Gerhart Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:15
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; H01M6/181
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
104 words
A radiation curable composition useful in forming a solid electrolyte, said composition consisting essentially of a liquid monomeric or prepolymeric radiation polymerizable, polyethylenically unsaturated compound, at least 45% by weight of a radiation inert ionically conducting liquid and an ionizable ammonium or alkali metal salt wherein said ionically conducting liquid is an aprotic solvent and said polymerizable compound includes a repeating unit selected from the group consisting of ##STR2## where R' is hydrogen or a lower alkyl group and wherein said radiation polymerizable, polyethylenically unsaturated compound upon exposure to radiation is capable of producing a matrix which is interpenetrated by said ionically conducting liquid.
Claim 2
Dependent Claim
104 words
A radiation curable composition useful in forming a solid electrolyte, said composition consisting essentially of a liquid monomeric or prepolymeric radiation polymerizable, polyethylenically unsaturated compound, at least 45% by weight of a radiation inert ionically conducting liquid and an ionizable ammonium or alkali metal salt wherein said ionically conducting liquid is an aprotic solvent and said polymerizable compound includes a repeating unit selected from the group consisting of ##STR2## where R' is hydrogen or a lower alkyl group and wherein said radiation polymerizable, polyethylenically unsaturated compound upon exposure to radiation is capable of producing a matrix which is interpenetrated by said ionically conducting liquid.
Claim 3
Dependent Claim
64 words
The composition of claim 1 wherein said radiation polymerizable compound is selected from the group consisting of the formulas I to III below: ##STR3## wherein A represents an ethylenically unsaturated moiety or a glycidyl moiety, R is hydrogen or a C 1 -C 3 alkyl group, and n is a polyethylene glycol modified compound selected from the group consisting of about 3 to 50.
Claim 4
Dependent Claim
26 words
The composition of claim 1 wherein said radiation polymerizable compound is a polyethylene glycol modified to include terminal ethylenically unsaturated groups or an acrylate functionalized polyurethane.
Claim 5
Dependent Claim
33 words
The composition of claim 3 wherein said radiation polymerizable compound is a polyethylene glycol modified compound selected from the group consisting of polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, and polyethylene glycol diglycidyl ether.
Claim 6
Dependent Claim
15 words
The composition of claim 4 wherein said ionically conducting liquid is polyethylene glycol dimethyl ether.
Claim 7
Dependent Claim
22 words
The composition of claim 4 wherein said radiation polymerizable compound is a mixture of a difunctional and a trifunctional polyethylenically unsaturated compound.
Claim 8
Dependent Claim
59 words
The composition of claim 1 wherein said salt is a salt of a cation selected from the group consisting of lithium, sodium, potassium, and ammonium cations; and an anion selected from the group consisting of I-, Br-, SCN- C10 4 -, CF 3 SO 3 -, BF 4 -, PF 6 -, AsF 6 -, and CF 3 C00-.
Claim 9
Dependent Claim
15 words
The composition of claim 1 wherein said radiation is ultraviolet radiation or electron beam radiation.
Claim 10
Dependent Claim
15 words
The composition of claim 1 where said composition is cured by exposure to actinic radiation.
Claim 11
Dependent Claim
13 words
The composition of claim 9 wherein said actinic radiation is electron beam radiation.
Claim 12
Dependent Claim
12 words
The composition of claim 9 wherein said actinic radiation is ultraviolet radiation.
Claim 13
Dependent Claim
9 words
The composition of claim 11 including an ultraviolet initiator.
Claim 14
Dependent Claim
29 words
The composition of claim 1 wherein said radiation polymerizable compound upon exposure to actinic radiation produces a polymerized or crosslinked matrix which is interpenetrated by said ionically conducting liquid.
Claim 15
Dependent Claim
80 words
A radiation curable composition useful in forming a solid electrolyte, said composition consisting essentially of: a liquid monomeric or prepolymeric radiation polymerizable, polyethylenically unsaturated compound, at least 45% by weight of a radiation inert ionically conducting liquid and an ionizable ammonium or alkali metal salt wherein said ionically conducting liquid is an aprotic solvent and wherein said radiation polymerizable, polyethylenically unsaturated compound upon exposure to radiation is capable of producing a matrix which is interpenetrated by said ionically conducting liquid.
Claim 16
Dependent Claim
80 words
A radiation curable composition useful in forming a solid electrolyte, said composition consisting essentially of: a liquid monomeric or prepolymeric radiation polymerizable, polyethylenically unsaturated compound, at least 45% by weight of a radiation inert ionically conducting liquid and an ionizable ammonium or alkali metal salt wherein said ionically conducting liquid is an aprotic solvent and wherein said radiation polymerizable, polyethylenically unsaturated compound upon exposure to radiation is capable of producing a matrix which is interpenetrated by said ionically conducting liquid.
Claim 17
Dependent Claim
25 words
The composition of claim 14 wherein said aprotic solvent is selected from the group consisting of propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, 2-methyltetrahydrofuan, tetraglyme, hexaglyme, and heptaglyme.
Claim 18
Dependent Claim
24 words
The composition of claim 15 wherein said radiation inert liquid is present in said mixture in an amount of at least 70% by weight.
Claim 19
Dependent Claim
25 words
The composition of claim 15 wherein said radiation polymerizable compound is poly (ethylene glycol-300) diacrylate and said radiation inert ionically conducting liquid is propylene carbonate.
Claim 20
Dependent Claim
15 words
The composition of claim 14 where said composition is cured by exposure to actinic radiation.
Claim 21
Dependent Claim
13 words
The composition of claim 18 wherein said actinic radiation is electron beam radiation.
Claim 22
Dependent Claim
12 words
The composition of claim 18 wherein said actinic radiation is ultraviolet radiation.
Claim 23
Dependent Claim
9 words
The composition of claim 20 including an ultraviolet initiator.
Claim 24
Dependent Claim
12 words
The composition of claim 18 wherein said actinic radiation is visible light.
Claim 25
Dependent Claim
29 words
The composition of claim 14 wherein said radiation polymerizable compound upon exposure to actinic radiation produces a polymerized or crosslinked matrix which is interpenetrated by said ionically conducting liquid.
Claim 26
Dependent Claim
14 words
The composition according to claim 14 wherein the ionically conducting liquid is propylene carbonate.
Claim 27
Dependent Claim
24 words
The composition according to claim 14 wherein said radiation polymerizable compound is an acrylate functionalized polyurethane and said ionically conducting liquid is propylene carbonate.
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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) | 1996-08-23 | 1997-02-22 | 1997-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-23 | 2001-02-22 | 2001-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-23 | 2005-02-22 | 2005-08-24 | $7700.00 | Window Closed / Lapsed |