Solid polymer electrolyte for batteries
AssigneeNational Research Council of Canada
InventorsAsmae Mokrini, Alexis Laforgue
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Abstract
Provided is a solid polymer electrolyte (SPE) comprising a dissociable metal salt; a metal ion conductive polymer system; and a phosphonium salt having the general formula [PR1R2R3R4]X, where each of R1, R2, R3 and R4 are independently selected from C1 to C12 hydrocarbons, which hydrocarbons may be optionally substituted by 1 to 5 heteroatoms selected from N, O, and S, and X is an anion. Further provided are a method for preparing the solid polymer electrolyte and an electrochemical cell comprising the solid polymer electrolyte.
Claims21
A solid polymer electrolyte comprising
- a. a dissociable metal salt;
- b. a metal ion conductive polymer system;
- and
- c. a phosphonium salt;
- wherein
- the dissociable metal salt is soluble in the metal ion conductive polymer system and the phosphonium salt;
- the dissociable metal salt, metal ion conductive polymer system, and phosphonium salt form a homogeneous structure;
- the phosphonium salt has the general formula [PR1R2R3R4]X, where each of R1, R2, R3 and R4 are independently selected from C1 to C12 hydrocarbons, which hydrocarbons may be optionally substituted by 1 to 5 heteroatoms selected from N, O, and S, and X is an anion;
- the phosphonium salt has a melting point below 80° C.;
- and
- the solid polymer electrolyte is solid at a temperature of 20° C.
A method for preparing a solid polymer electrolyte, the method comprising:
- a. providing a mixture comprising a metal ion conductive polymer system, a phosphonium salt, and a dissociable metal salt;
- and
- b. forming the mixture into a body, wherein the metal ion conductive polymer system and the phosphonium salt solubilize the dissociable metal salt;
- the dissociable metal salt, metal ion conductive polymer system, and phosphonium salt form a homogeneous structure;
- the phosphonium salt has the general formula [PR1R2R3R4]X, where each of R1, R2, R3 and R4 are independently selected from C1 to C12 hydrocarbons, which hydrocarbons may be optionally substituted by 1 to 5 heteroatoms selected from N, O, and S, and X is an anion;
- the phosphonium salt has a melting point below 80° C.;
- and
- the solid polymer electrolyte is solid at a temperature of 20° C.
Dependencies are inferred from the claim text.