非水電解質溶液へのシリカオルガノゾル添加によるアルミ電解コンデンサの耐電圧向上

概要

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The sustaining voltage of aluminum electrolytic capacitors can be enhanced by the addition of colloidal silica into their operating nonaqueous electrolyte solutions. A systematic study on the effects of colloidal silica on the scintillation voltage of aluminum electrolytic capacitors was carried out using silica organo-sols dispersed in ethylene glycol and quaternary ammonium carboxylate/γ-butyrolactone solutions. It was confirmed that maintaining the dispersed state of nano-particles in electrolytes so as not to cause gelation is the prime requirement as a sustaining voltage booster. The synergetic effect of organo-phosphorous acids was also examined.