US 12,148,579 B2
Electrolytic capacitor
Yuichiro Tsubaki, Kyoto (JP); Tatsuji Aoyama, Kyoto (JP); Kazuyo Saito, Osaka (JP); and Yuji Otsuka, Yamaguchi (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Jul. 27, 2023, as Appl. No. 18/360,528.
Application 18/360,528 is a continuation of application No. 17/688,359, filed on Mar. 7, 2022, granted, now 11,756,739.
Application 17/688,359 is a continuation of application No. 16/833,951, filed on Mar. 30, 2020, granted, now 11,302,486, issued on Apr. 12, 2022.
Application 16/833,951 is a continuation of application No. PCT/JP2018/040226, filed on Oct. 30, 2018.
Claims priority of application No. 2017-210677 (JP), filed on Oct. 31, 2017.
Prior Publication US 2023/0377807 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01G 9/035 (2006.01); H01G 9/028 (2006.01); H01G 9/048 (2006.01)
CPC H01G 9/035 (2013.01) [H01G 9/028 (2013.01); H01G 9/048 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising:
a capacitor element; and
an electrolytic solution, wherein:
the capacitor element includes:
an anode body including a dielectric layer;
a cathode body; and
a solid electrolyte in contact with the dielectric layer,
the electrolytic solution includes a solvent, a solute, and a polymer component,
the polymer component includes polyalkylene glycol,
the polyalkylene glycol includes an oxyethylene-oxypropylene copolymer,
a concentration of the oxyethylene-oxypropylene copolymer in the electrolytic solution is more than or equal to 5% by mass and less than or equal to 50% by mass, and
a number-average molecular weight of the oxyethylene-oxypropylene copolymer ranges from 1,000 to 5,000, inclusive.