摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum electrolytic capacitor having improved shelf characteristics. SOLUTION: In this aluminum electrolytic capacitor, a combination where phosphate ions is bonded to a water-soluble complex made of aminopolycarboxylic acid and aluminum is contained in a capacitor element using cathode foil where a silane coupling agent adheres onto a surface with a solvent containing water, thus achieving the low impedance characteristics, maintaining a proper amount of phosphate ions in the electrolyte for a long time, improving the shelf characteristic of the aluminum electrolytic capacitor by inhibiting deterioration in electrode foil after being left on a shelf, and increasing initial capacitance.
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