| 摘要 |
本发明的课题是以即便在维持高的初始导电率的状态且在周边环境的进一步高温化或多湿条件下，亦不会自密封部漏出电解液的方式，提高电解电容器的可靠性。本发明的铝电解电容器用电解液含有溶剂(A)及下述通式(1)所示的电解质(D)而成，相对于(A)及(D)的合计重量，选自由下述通式(2)~通式(4)所示的各化合物(E1)~化合物(E3)所组成的组群的至少1种化合物(E)的含量为3重量%以下：[式中，R 1 ~R 3 表示碳数1~3的烷基、R 4 ~R 7 表示碳数1~3的烷基或氢原子、X - 表示酸(C)的阴离子];[式中，R 8 为碳数1~3的伸烷基；R 9 ~R 12 为碳数1~3的烷基或氢原子；另外，R 11 与R 12 可进行共价键结];An object of the invention is to promote reliability of an electrolytic capacitor by generating no electrolyte leakage from a sealing part even under conditions of maintaining a high initial electrical conductivity and further temperature increase or high humidity of a peripheral environment. The electrolyte for an aluminum electrolytic capacitor of the invention includes a solvent (A) and an electrolyte (D) represented by the following general formula (1). A content of at least one compound (E) selected from a group consisting of compounds (E1)-(E3), respectively represented by the following general formulae (2)-(4), based on a total weight of (A) and (D) is 3 weight % or less: [in the formula, R 1 -R 3 represent an alkyl group of 1-3 carbons, R 4 -R 7 represent an alkyl group of 1-3 carbons or a hydrogen atom, and X - represents an anion of an acid (C)] ;[in the formula, R 8 is an alkylene group of 1-3 carbons; R 9 -R 12 represent an alkyl group of 1-3 carbons or a hydrogen atom; in addition, R 11 and R 12 may be covalently bonded] |
