Electrolysis solution for electrolytic capacitors

• Main Authors: Abe, Koji, Matsumori, Yasuo, Yuguchi, Motoki, Ito, Akikazu, Hamamoto, Toshikazu, Ushigoe, Yoshihiro
• Format: Patent
• Language: English
• Published: 14.09.2004

The present invention relates to an electrolytic solution for electrolytic capacitors, that is, an electrolytic solution for driving electrolytic capacitors. Specifically, the invention relates to an electrolytic solution composition which is favorably employable as an electrolytic solution for driving medium-to-high pressure aluminum electrolytic capacitors. An electrolysis solution for electrolytic capacitors including an aqueous organic solvent consisting of water and a water-compatible organic solvent and 1,6-decane-dicarboxylic acid or salt thereof dissolved therein. The solution further contains one or more additives selected from dinitriles, pivalic acid and salts thereof, diesters, alkylated lactones, cyanoalkanoic esters, monocarbboxylic acids each having a Calkyl chain and substituted with two Calkyl groups at the -position to the carboxyl group and salts thereof, monocarboxylic acids each having Calkyl chain and substituted with one ethyl group at the -position to the carboxyl group and salts thereof, and monocarboxylic acids derived from cyclic saturated compounds each having five or six ring-constituting carbon atoms and salts thereof. When one or more compounds selected from among dinitriles, diesters, alkylated lactones and cyanoalkanoic esters are used as the additives, the 1,6-decanedicarboxylic acid may be replaced by other carboxylic acid.