| abstract |
An electrolytic solution containing a heteroelement-containing organic solvent in a molar ratio of 3-5 relative to a metal salt, the heteroelement-containing organic solvent containing a specific organic solvent having a relative permittivity of not greater than 10 and / or a dipole moment of not greater than 5D, the metal salt is a metal salt whose cation is an alkali metal, an alkaline earth metal or aluminum, and whose anion has a chemical structure represented by the following general formulas (1): (R1X1) (R2SO2) General formula (1). |