Nonaqueous electrolyte and nonaqueous electrolyte secondary...

Details Nonaqueous electrolyte and nonaqueous electrolyte secondary... Nonaqueous electrolyte and nonaqueous electrolyte secondary...

H - Electricity

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H01M 10/40 (2006.01) C07C 217/08 (2006.01) C07C 311/48 (2006.01) C07D 233/56 (2006.01) C07D 295/088 (2006.01) H01M 2/16 (2006.01)

Patent

CA 2497109

A nonaqueous electrolyte which comprises an ionic liquid represented by the following general formula (1) and having a melting point of 50~C or lower, a compound which is reductively decomposed at a nobler potential than the ionic liquid, and a lithium salt. (1) In the formula, R1 to R4 are the same or different and each represents C1-5 alkyl or alkoxyalkyl represented by R'-O- (CH2)n- (wherein R' represents methyl or ethyl and n is an integer of 1 to 4), provided that two of R1, R2, R3, and R4 in combination may form a ring and that at least one of R1 to R4 is the alkoxyalkyl; X represents nitrogen or phosphorus; and Y represents a monovalent anion.

La présente invention concerne un électrolyte non aqueux qui comprend un liquide ionique représenté par la formule générale suivante (1) et présentant un point de fusion supérieur ou égal à 50 ·C, un composé décomposé par réduction à un potentiel plus noble que le liquide ionique, ainsi qu'un sel de lithium. Dans cette formule, R?1¿ à R?4¿ sont identiques ou différents et représentent chacun alkyle ou alkoxyalkyle C¿1-5?, représenté par R'-O-(CH¿2?)n- (où R' représente méthyle ou éthyle et n est un entier de 1 à 4), à condition que deux de R?1¿, R?2¿, R?3¿ et R?4¿ forment en combinaison un noyau et qu'au moins un de R?1¿ à R?4¿ soit l'alkoxyalkyle, X représente azote ou phosphore et Y représente un anion monovalent.

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