摘要 |
A nonaqueous electrolyte which contains an ionic liquid having general formula (1) below and a melting point not higher than 50° C., a compound which reductively decomposes at a more noble potential than the ionic liquid, and a lithium salt. In formula (1), R<SUP>1 </SUP>to R<SUP>4 </SUP>are each independently an alkyl group of 1 to 5 carbons or an alkoxyalkyl group of the formula R'-O-(CH<SUB>2</SUB>)<SUB>n</SUB>- (R' being methyl or ethyl, and the letter n being an integer from 1 to 4), and any two from among R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3 </SUP>and R<SUP>4 </SUP>may together form a ring, with the proviso that at least one of R<SUP>1 </SUP>to R<SUP>4 </SUP>is an alkoxyalkyl group of the above formula. X is a nitrogen atom or a phosphorus atom, and Y is a monovalent anion.
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