Functionalized phosphorus containing 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 phosphate-terminated or phosphonate-terminated perfluoropolyethers (PFPEs) having high ionic conductivity. Also provided are non-flammable electrolyte compositions including phosphate-terminated or phosphonate-terminated perfluoropolyethers (PFPEs) and alkali-metal ion batteries including the non-flammable electrolyte compositions.
Claims30
A non-flammable liquid or solid electrolyte composition comprising:
- an electrolyte solvent including a functionally substituted perfluoropolyether according to Formula I or Formula II:
- Rf—Xo—R′ (I)
- R″—Xm—Rf—Xo—R′ (II)
- wherein Rf is a perfluoropolyether backbone having no C—H bonds,
- X is an alkyl, fluoroalkyl, ether, or fluoroether group, wherein ‘m’ and ‘o’ are each independently zero or an integer ≧1, and
- R″ and R′ are each independently selected from the group consisting of phosphate or phosphonate containing groups;
- and
- an alkali metal salt dissolved in the functionally substituted perfluoropolyether.
Dependencies are inferred from the claim text.