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US 10,308,587 B2Granted
Functionalized fluoropolymers and electrolyte compositions
AssigneeBlue Current, Inc.
InventorsAlexander Teran, Benjamin Rupert, Eduard Nasybulin, Joanna Burdynska
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Abstract
Provided herein are functionally substituted fluoropolymers suitable for use in liquid and solid non-flammable electrolyte compositions. The functionally substituted fluoropolymers include perfluoropolyethers (PFPEs) having high ionic conductivity. Also provided are non-flammable electrolyte compositions including functionally substituted PFPEs and alkali-metal ion batteries including the non-flammable electrolyte compositions.
Claims30
A non-flammable electrolyte composition comprising:
- an alkali metal salt;
- and
- an electrolyte solvent comprising a functionally substituted perfluoropolyether and one or more Cl—CIO cycloalkyl carbonates, wherein the functionally substituted perfluoropolyether comprises between 30 wt % and 95 wt % of the solvent, the one or more Cl—CIO cycloalkyl carbonates comprises at least 5 wt % of the solvent, and the functionally substituted perfluoropolyether is the largest component by weight of the solvent, wherein the functionally substituted perfluoropolyether is according to Formula (I):
- Rf—X0—R′ (I)
- wherein Rf is an unsubstituted perfluoropolyether backbone;
- X is an alkyl, fluoroalkyl, ether, or fluoroether linking group, wherein ‘o’ zero or an integer ≥1;
- and
- R′ is a linear carbonate containing group.
5 more elements
Dependencies are inferred from the claim text.