公开(公告)号：US20120026645A1

公开(公告)日：2012-02-02

申请号：US13258507

申请日：2009-07-11

申请人： Masao Sakakura ,  Junichi Kawakami ,  Kazuma Okura ,  Shingo Takeuchi ,  Masashi Ozama ,  Kenji Tamamitsu

发明人： Masao Sakakura ,  Junichi Kawakami ,  Kazuma Okura ,  Shingo Takeuchi ,  Masashi Ozama ,  Kenji Tamamitsu

IPC分类号： H01G9/02 ,  H01G9/035

CPC分类号： H01G9/035 ,  H01G9/045 ,  H01G9/145

摘要： Disclosed are an aluminum electrolytic capacitor having low impedance properties and a long service life, and an electrolytic solution which enables to give such capacitor. The electrolytic solution contains a solvent containing water, a phosphorus oxoacid ion-generating compound which can generate a phosphorus oxoacid ion in an aqueous solution, and a chelating agent which can coordinate with aluminum to form an aqueous aluminum chelate complex. The electrolytic solution further contains a compound selected from the group consisting of azelaic acid and an azelaic acid salt, and a compound selected from the group consisting of formic acid, a formic acid salt, adipic acid, an adipic acid salt, glutaric acid and a glutaric acid salt. The content of azelaic acid and/or the azelaic acid salt is at least 0.03 moles per kg of the solvent. When the electrolytic solution is used in an electrolytic capacitor which utilizes an anode having an aluminum oxide film containing phosphorus in an amount of 30 to 150 mg per unit CV product in terms of phosphoric acid, the service life of the capacitor is remarkably prolonged.

摘要翻译： 公开了一种具有低阻抗性和长使用寿命的铝电解电容器，以及能够提供这种电容器的电解液。 电解液含有含水的溶剂，能够在水溶液中产生含磷酸的离子的含磷酸氧离子的化合物，以及可与铝配位以形成铝酸水溶液络合物的螯合剂。 电解液还含有选自壬二酸和壬二酸盐的化合物和选自甲酸，甲酸盐，己二酸，己二酸盐，戊二酸和 戊二酸盐。 壬二酸和/或壬二酸盐的含量为每千克溶剂至少0.03摩尔。 当电解液用于利用具有氧化铝膜的阳极的电解电容器时，磷酸的含量为每单位CV产品30〜150mg，磷的使用寿命显着延长。