Electrolytic capacitor and method for manufacturing electrolytic capacitor
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorKazuhiro Takatani
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Abstract
An electrolytic capacitor includes a capacitor element. The capacitor element includes an anode body that includes a dielectric layer disposed at a surface of the anode body, a cathode body, and a separator disposed between the anode body and the cathode body. The capacitor element is impregnated with an electrolytic solution. A conductive polymer and a polyacrylic acid-based compound are provided on the dielectric layer.
Claims13
An electrolytic capacitor comprising a capacitor element, the capacitor element including:
- an anode body that includes a dielectric layer disposed at a surface of the anode body;
- a cathode body;
- and
- a separator disposed between the anode body and the cathode body,
- wherein:
- the capacitor element is impregnated with an electrolytic solution,
- a conductive polymer and a polyacrylic acid-based compound are provided on the dielectric layer,
- the polyacrylic acid-based compound includes an acrylic acid unit and a methacrylic acid unit, and
- a mole ratio of the acrylic acid unit to the methacrylic acid unit in the polyacrylic acid-based compound ranges from 0.3 to 5.0, inclusive.
A method for manufacturing an electrolytic capacitor, the method comprising the steps of:
- forming a capacitor element including an anode body that includes a dielectric layer disposed at a surface of the anode body, a cathode body, and a separator disposed between the anode body and the cathode body;
- providing a conductive polymer and a polyacrylic acid-based compound on the dielectric layer by impregnating the capacitor element with a polymer dispersion containing the conductive polymer and the polyacrylic acid-based compound;
- and
- impregnating the capacitor element with an electrolytic solution, the capacitor element including the conductive polymer and the polyacrylic acid-based compound which are provided on the dielectric laver, wherein:
- the polyacrylic acid-based compound includes an acrylic acid unit and a methacrylic acid unit, and
- a mole ratio of the acrylic acid unit to the methacrylic acid unit in the polyacrylic acid-based compound ranges from 0.3 to 5.0, inclusive.
Dependencies are inferred from the claim text.