US 11,756,739 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 Mar. 7, 2022, as Appl. No. 17/688,359.
Application 17/688,359 is a continuation of application No. 16/833,951, filed on Mar. 30, 2020, granted, now 11,302,486.
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 2022/0189705 A1, Jun. 16, 2022
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)] 9 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising a capacitor element and an electrolytic solution, the capacitor element including: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer, wherein:
the electrolytic solution includes a solvent, a solute, and a polymer component,
the solvent includes an ethylene glycol compound,
the polymer component includes polyalkylene glycol,
the polyalkylene glycol includes an oxyethylene-oxypropylene copolymer,
a molar ratio m/n of oxyethylene units to oxypropylene units in the polyalkylene glycol is greater than 1 and less than or equal to 5, and
a number-average molecular weight of the oxyethylene-oxypropylene copolymer ranges from 1,000 to 5,000, inclusive.