US 12,424,391 B2
Electrode foil for electrolytic capacitors, electrolytic capacitor, method for producing electrode foil for electrolytic capacitors, and method for producing electrolytic capacitor
Mitsuhisa Yoshimura, Osaka Fu (JP); Masami Tsubaki, Kyoto Fu (JP); Naomi Kurihara, Osaka Fu (JP); and Miwa Ogawa, Osaka Fu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/042,435
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Aug. 18, 2021, PCT No. PCT/JP2021/030242
§ 371(c)(1), (2) Date Feb. 21, 2023,
PCT Pub. No. WO2022/044932, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-143913 (JP), filed on Aug. 27, 2020.
Prior Publication US 2023/0335341 A1, Oct. 19, 2023
Int. Cl. H01G 9/055 (2006.01); H01G 9/00 (2006.01); H01G 9/045 (2006.01); H01G 9/145 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/055 (2013.01) [H01G 9/0029 (2013.01); H01G 9/045 (2013.01); H01G 9/145 (2013.01); H01G 9/15 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrode foil for an electrolytic capacitor comprising: an anode body having a porous portion and a core part continuous with the porous portion,
a dielectric layer covering a surface of a metal skeleton forming the porous portion, wherein:
an interface layer including a first element is present between the metal skeleton and the dielectric layer,
the first element is at least one selected from the group consisting of sulfur, phosphorous, and nitrogen,
the porous portion has a plurality of tunneled pits,
each of the plurality of tunneled pits includes at least a main pit extending from a surface side of the porous portion to a side of the core part,
the main pit has a wall surface declined relative to a length direction of the main pit at a cross section in a thickness direction of the porous portion of the anode body, and
the wall surface of the main pit is declined relative to the length direction of the main pit with an angle of 0.01° or more and 3° or less.