US 11,756,739 B2
Electrolytic capacitor
Yuichiro Tsubaki, Kyoto (JP); Tatsuji Aoyama, Kyoto (JP); Kazuyo Saito, Osaka (JP); and Yuji Otsuka, Yamaguchi (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.