US5037712A
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Preparation of radiation cured solid electrolytes and electrochemical devices employing the same
Assignee: Ultracell Inc
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Filing: 1990-04-06
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Granted: 1991-08-06
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Expires: 2010-04-06
Abstract
Abstract A method is described for forming a solid electrolyte comprising a polymeric network structure containing an ionically conducting liquid for use in solid state electrochemical cells which comprises forming a mixture of a crosslinkable polysiloxane or a crosslinkable polyethylene oxide, an ionically conducting liquid, and an ionizable ammonium or alkali metal salt, and subjecting said mixture to actinic radiation to thereby crosslink said crosslinkable polysiloxane or crosslinkable polyethylene oxide to form a solid matrix through which said ionically conducting liquid interpenetrates to provide continuous paths of high conductivity in all directions throughout said matrix.
Inventors
- 👤 Dale R. Shackle
- 👤 Mei-Tsu Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:05
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/24; H01M10/28; H01M10/05; H01M10/056; H01M10/0564; H01M10/0565; C; C08; C08F; C08F283/00; C08F283/06; C08F283/12; C08L; C08L71/00; C08L71/02; H01M6/00; H01M6/14; H01M6/18; H01M6/181; H01M10/052; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
92 words
A method for forming a solid electrolyte comprising a polymeric network structure containing an ionically conducting liquid for use in solid state electrochemical cells which comprises forming a mixture of a crosslinkable polysiloxane or a crosslinkable polyethylene oxide, an ionically conducting liquid, and an ionizable ammonium or alkali metal salt, and subjecting said mixture to actinic radiation to thereby crosslink said crosslinkable polysiloxane or crosslinkable polyethylene oxide to form a solid matrix through which said ionically conducting liquid interpenetrates to provide continuous paths of high conductivity in all directions throughout said matrix.
Claim 2
Independent Claim
92 words
A method for forming a solid electrolyte comprising a polymeric network structure containing an ionically conducting liquid for use in solid state electrochemical cells which comprises forming a mixture of a crosslinkable polysiloxane or a crosslinkable polyethylene oxide, an ionically conducting liquid, and an ionizable ammonium or alkali metal salt, and subjecting said mixture to actinic radiation to thereby crosslink said crosslinkable polysiloxane or crosslinkable polyethylene oxide to form a solid matrix through which said ionically conducting liquid interpenetrates to provide continuous paths of high conductivity in all directions throughout said matrix.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said mixture also contains a crosslinkable polyethylenically unsaturated compound.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein said crosslinkable polysiloxane is a polyethylene oxide grafted polysiloxane.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein said polyethylenically unsaturated compound including at least one heteroatom in the molecule.
Claim 6
Dependent Claim
30 words
The method of claim 4 wherein said polyethylenically unsaturated compound includes a repeating unit selected from the group consisting of ##STR3## where R' is hydrogen or a lower alkyl group.
Claim 7
Dependent Claim
50 words
The method of claim 5 wherein said polyethylenically unsaturated compound is represented by the formulas I to III below, ##STR4## where n is about 3 to 50 and R is hydrogen or a C 1 -C 3 alkyl group and A represents an ethylenically unsaturated moiety or a glycidyl moiety.
Claim 8
Dependent Claim
21 words
The method of claim 6 wherein said polyethylenically unsaturated compound is a polyethylene glycol modified to include terminal ethylenically unsaturated groups.
Claim 9
Dependent Claim
26 words
The method of claim 7 wherein said polyethylenically unsaturated compound is polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, an acrylate functionized polyurethane, or polyethylene glycol diglycidyl ether.
Claim 10
Dependent Claim
71 words
The method of claim 8 wherein said ionizable 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 - , ClO 4 - , CFSO 3 - , BF 4 - , PF 6 - , AsF 6 - , and CF 3 COO - .
Claim 11
Dependent Claim
13 words
The method of claim 9 wherein said ionizable salt is a lithium salt.
Claim 12
Dependent Claim
15 words
The method of claim 10 wherein said lithium salt is LiCF 3 SO 3 .
Claim 13
Dependent Claim
35 words
The method of claim 1 wherein said ionically conducting liquid is selected from the group consisting of polyethylene glycol dimethyl ether, propylene carbonate, gamma-butyrolactone, 1,3-dioxolane, 2-methyltetrahydrofuran, tetraglyme, hexaglyme, and heptaglyme, and polyethylene oxide grafted polysiloxane.
Claim 14
Dependent Claim
16 words
The method of claim 12 wherein said ionically conducting liquid is a polyethylene oxide grafted polysiloxane.
Claim 15
Dependent Claim
24 words
The method of claim 12 wherein said ionically conducting liquid is present in said mixture in an amount of at least 45% by weight.
Claim 16
Dependent Claim
24 words
The method of claim 12 wherein said ionically conducting liquid in present is said mixture in an amount of at least 70% by weight.
Claim 17
Dependent Claim
14 words
The method of claim 14 wherein said mixture additionally contains a radiation curable comonomer.
Claim 18
Dependent Claim
20 words
The method of claim 15 wherein said radiation curable comonomer is trimethylolpropane triacrylate, trimethylolpropane ethoxylated triacrylate or trimethylolpropane propoxy triacrylate.
Claim 19
Independent Claim
129 words
A method for forming a solid electrolyte comprising a polymeric network structure containing an ionically conducting liquid for use in solid state electrochemical cells which comprises forming a mixture of a crosslinkable polyethylenically unsaturated compound, a crosslinkable polysiloxane or a crosslinkable polyethylene oxide, an ionically conducting liquid polyethylene oxide grafted polysiloxane, and LiCF 3 SO 3 , said polyethylenically unsaturated compound being represented by the formulas ##STR5## where n is about 3 to 50, R is hydrogen or a C 1 -C 3 alkyl group and A represents an ethylenically unsaturated moity or a glycidyl moiety, and subjecting said mixture to actinic radiation to form a solid matrix through which said ionically conducting, liquid polyethylene oxide grafted polysiloxane interpenetrated to provide continuous paths of high conductivity in all directions.
Claim 20
Independent Claim
129 words
A method for forming a solid electrolyte comprising a polymeric network structure containing an ionically conducting liquid for use in solid state electrochemical cells which comprises forming a mixture of a crosslinkable polyethylenically unsaturated compound, a crosslinkable polysiloxane or a crosslinkable polyethylene oxide, an ionically conducting liquid polyethylene oxide grafted polysiloxane, and LiCF 3 SO 3 , said polyethylenically unsaturated compound being represented by the formulas ##STR5## where n is about 3 to 50, R is hydrogen or a C 1 -C 3 alkyl group and A represents an ethylenically unsaturated moity or a glycidyl moiety, and subjecting said mixture to actinic radiation to form a solid matrix through which said ionically conducting, liquid polyethylene oxide grafted polysiloxane interpenetrated to provide continuous paths of high conductivity in all directions.
Claim 21
Dependent Claim
25 words
The method of claim 18 wherein said polyethylene oxide grafted polysiloxane is present in said mixture in an amount of at least 45% by weight.
Claim 22
Dependent Claim
19 words
The method of claim 19 wherein said mixture additionally contains trimethylolpropane triacrylate, trimethylolpropane ethoxylated triacrylate or trimethylolpropane propoxylated triacrylate.
References Cited (Backward Citations)
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