Graft oligomeric electrolytes
AssigneeE. I. Du Pont de Nemours and Company
InventorsHanne Anna Katharina Blau, Pui-Yan Lin, José Manuel Rodriguez-Parada
Life of this patent
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Abstract
Disclosed are compositions prepared by free-radical-driven grafting onto hydrocarbons or hydrocarbon ethers of olefinically unsaturated fluorocarbons containing sulfonyl fluoride, fluorosulfonate, fluorosulfonimide, or fluorosulfonyl methide groups, wherein the grafting step is followed by a hydrolysis step in the case of sulfonyl fluoride.
Claims29
A composition comprising a saturated acyclic aliphatic hydrocarbon radical, said hydrocarbon radical having disposed thereupon at least one pendant group represented by the formula
- wherein said hydrocarbon radical is optionally substituted with one or more ether oxygens;
- wherein Rf is represented by the formula
- —Q—Oa—(CF2CFRf′—Ob)cCF2CF2—
- where a=0 or 1, b=0 or 1, c=0,1 or 2;
- —Q— is represented by the formula
- —CZ2CZ2—
- where Z is H, F, alkyl or fluoroalkyl with the proviso that not more than one Z may be alkyl or fluoroalkyl:
- Rf′ is F or a perfluoroalkyl radical having 1-10 carbons optionally substituted by one or more ether oxygens;
- X is F or —Y(M)(SO2Rf″)p wherein p=0-2, with the proviso that Y is O when p=0, Y is N when p=1, and Y is C when p=2, M is an alkali metal cation or H+, and Rf″ is a perfluoroalkyl radical having 1-10 carbons optionally substituted with one or more ether oxygens, or Rf″ is CN when p=2.
A process for forming a composition, the process comprising contacting in the presence of a free radical initiator a saturated acyclic aliphatic hydrocarbon optionally substituted with one or more ether oxygens, with an olefinically unsaturated fluorocarbon and, heating in order to decompose the initiator and form free radicals;
- said olefinically unsaturated fluorocarbon being represented by the formula
- CZ2=CZ—Oa—(CF2CFRf′—Ob)cCF2CF2—SO2X
- where Z is H, F, alkyl or fluoroalkyl with the proviso that not more than one Z may be alkyl or fluoroalkyl;
- Rf′ is F or a perfluoroalkyl radical having 1-10 carbons optionally substituted by one or more ether oxygens;
- and X is F or —Y(M)(SO2Rf″)p wherein p=0-2, with the proviso that Y is O when p=0, Y is N when p=1, and Y is C when p=2, M is an alkali metal cation or H+, and Rf″ is a perfluoroalkyl radical having 1-10 carbons optionally substituted with one or more ether oxygens.
An electrolyte composition comprising a liquid, a polymer, or a mixture thereof combined with a composition comprising a saturated acyclic aliphatic hydrocarbon radical optionally substituted with one or more ether oxygens, said hydrocarbon radical having disposed thereupon at least one pendant group represented by the formula
- wherein Rf is represented by the formula
- —Q—Oa—(CF2CFRf′—Ob)cCF2CF2—
- where a=0 or 1, b=0 or 1, c=0,1 or 2;
- —Q— is represented by the formula
- —CZ2CZ2—
- where Z is H, F, alkyl or fluoroalkyl with the proviso that not more than one Z may be alkyl or fluoroalkyl;
- Rf′ is F or a perfluoroalkyl radical having 1-10 carbons optionally substituted by one or more ether oxygens;
- X is F or —Y(M)(SO2Rf″)p wherein p=0-2, with the proviso that Y is O when p=0, Y is N when p=1, and Y is C when p=2, M is an alkali metal cation or H+, and Rf″ is a perfluoroalkyl radical having 1-10 carbons optionally substituted with one or more ether oxygens, or Rf″ is CN when p=2.
An electrochemical cell comprising a positive electrode, a negative electrode, a separator, and an electrolyte solution, in ionically conductive contact with one another, said electrolyte solution comprising a liquid or a polymer combined with a composition comprising a saturated acyclic aliphatic hydrocarbon radical optionally substituted with one or more ether oxygens, said hydrocarbon radical optionally substituted with one or more ether oxygens having disposed thereupon at least one pendant group represented by the formula
- wherein Rf is represented by the formula
- —Q—Oa—(CF2CFRf′—Ob)cCF2CF2—
- where a=0 or 1, b=0 or 1, c=0,1 or 2;
- —Q— is represented by the formula
- —CZ2CZ2—
- where Z is H, F, alkyl or fluoroalkyl with the proviso that not more than one Z may be alkyl or fluoroalkyl;
- Rf′ is F or a perfluoroalkyl radical having 1-10 carbons optionally substituted by one or more ether oxygens;
- X is F or —Y(M)(SO2Rf″)p wherein p=0-2, with the proviso that Y is O when p=0, Y is N when p=1, and Y is C when p=2, M is an alkali metal cation or H+, and Rf″ is a perfluoroalkyl radical having 1-10 carbons optionally substituted with one or more ether oxygens, or Rf″ is CN when p=2.
Dependencies are inferred from the claim text.