ELECTROLYTE SOLUTION AND ELECTROLYTIC CAPACITOR USING THE SAME

摘要

Disclosed is an electrolyte solution for electrolytic capacitors, which contains an organic solvent, an additive dissolved in the organic solvent, and an electrolyte. The additive is composed of at least one boric acid ester represented by one of the formula (1), formula (2) and formula (3) below. The electrolyte is composed of an onium cation and an anion of a polyvalent carboxylic acid. Formula (1) Formula (2) Formula (3) In the formulae, an end may be CH<SUB>3</SUB> or H; R1, R2 and R3 respectively represent -CH<SUB>2</SUB>O-, -C<SUB>2</SUB>H<SUB>4</SUB>O-, -C<SUB>3</SUB>H<SUB>6</SUB>O- or -C<SUB>4</SUB>H<SUB>8</SUB>O-; and k, l, m and n respectively represent an arbitrary natural number.