US 11,945,923 B2
Conductive polymer dispersion liquid, electrolytic capacitor, and method for producing electrolytic capacitor
Daisuke Kubo, Osaka (JP); Hiroyuki Arima, Osaka (JP); Tomoyuki Tashiro, Yamaguchi (JP); Kazuhiro Takatani, Hyogo (JP); Kenta Chashiro, Osaka (JP); and Shumpei Matsushita, Yamaguchi (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/427,530
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Jan. 29, 2020, PCT No. PCT/JP2020/003112
§ 371(c)(1), (2) Date Jul. 30, 2021,
PCT Pub. No. WO2020/158783, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 2019-016512 (JP), filed on Jan. 31, 2019; and application No. 2019-016513 (JP), filed on Jan. 31, 2019.
Prior Publication US 2022/0162404 A1, May 26, 2022
Int. Cl. C08J 5/18 (2006.01); C08J 5/04 (2006.01); H01G 9/00 (2006.01); H01G 9/02 (2006.01)
CPC C08J 5/18 (2013.01) [C08J 5/045 (2013.01); C08J 5/046 (2013.01); H01G 9/0032 (2013.01); H01G 9/02 (2013.01); C08J 2365/00 (2013.01); C08J 2401/02 (2013.01); C08J 2433/26 (2013.01); C08J 2467/02 (2013.01); C08J 2477/00 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for producing an electrolytic capacitor, the method comprising the steps of:
preparing an anode foil that includes a dielectric layer, a cathode foil, and a fiber structure;
preparing a conductive polymer dispersion liquid that contains a conductive polymer component and a dispersion medium;
producing a separator by applying the conductive polymer dispersion liquid to the fiber structure and then removing at least a portion of the dispersion medium, wherein a mass of the conductive polymer component per unit area of the separator is 0.02 mg/cm2 or more; and
producing a capacitor element by sequentially stacking the anode foil, the separator, and the cathode foil,
wherein the dispersion medium contains water,
the fiber structure contains a synthetic fiber in an amount of 50 mass % or more, and
the fiber structure has a density of 0.2 g/cm3 or more and less than 0.45 g/cm3.