| 摘要 |
The present invention provides a cell that does not impair heat resistant safety and electrochemical characteristics such as a discharge characteristic, and enhances long-period reliability. In the cell of the present invention, a nonaqueous solvent has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of 200° C. or higher, and has, among compounds represented by the following general formula (1), at least one solvent having a boiling point of lower than 200° C.; and the total volume ratio at 23° C. of the compounds represented by the following general formula (1) is 95 to 100 percent of the nonaqueous solvent, <?in-line-formulae description="In-line Formulae" end="lead"?>X-(O-C<SUB>2</SUB>H<SUB>4</SUB>)n-O-Y (1)<?in-line-formulae description="In-line Formulae" end="tail"?> (where X and Y are independently an alkyl group (number of carbons: 1-4), and n is 1-5).
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