| 摘要 |
PROBLEM TO BE SOLVED: To prevent leakage of driving electrolyte by employing a salt of 4-imidazolone group shown by a specific formula as a solute. SOLUTION: A driving electrolyte employing a salt of 5-imidazolones shown by a formula (in the formula, R1 , R2 and R3 are selected, respectively, from hydrogen and alkyl group of 1-3C) as a salute is used. Salt of 5-imidazolones can be selected freely and a salt of organic carboxylic acid, e.g. phthalic acid or maleic acid, is preferably employed. Furthermore, a solvent principally comprising one or two kind of material selected fromγ-butyrolactone and ethylene glycol is preferably employed. According to the arrangement, leakage of driving electrolyte can be eliminated.
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