US 12,087,514 B2
Electrolytic capacitor and paste for forming conductive layer of electrolytic capacitor
Kei Hirota, Okayama (JP); and Keita Uenaka, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/760,001
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 17, 2021, PCT No. PCT/JP2021/005825
§ 371(c)(1), (2) Date Aug. 2, 2022,
PCT Pub. No. WO2021/172123, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 2020-034465 (JP), filed on Feb. 28, 2020.
Prior Publication US 2023/0074619 A1, Mar. 9, 2023
Int. Cl. H01G 9/042 (2006.01); H01G 9/048 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/0425 (2013.01) [H01G 9/048 (2013.01); H01G 9/15 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising a capacitor element, the capacitor element including:
an anode body;
a dielectric layer covering at least a part of the anode body;
a solid electrolyte layer covering at least a part of the dielectric layer; and
a cathode lead-out layer covering at least a part of the solid electrolyte layer, wherein:
the cathode lead-out layer includes a conductive layer,
the conductive layer includes carbon particles having conductivity and a first polymer having an acid group,
the acid group includes at least one selected from the group consisting of a sulfone group and a sulfonic acid derivative, and
an oxygen permeability of the conductive layer at a thickness of 10 μm is less than or equal to 7 cc/m2·day·atm.