NONAQUEOUS ELECTROLYTE AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

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 ioni c 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.