US 11,935,704 B2
Electrolytic capacitor comprising an electrolytic solution containing a first base component, a first acid component, and a second acid component
Yuichiro Tsubaki, Kyoto (JP); Kazuyo Saito, Osaka (JP); and Tatsuji Aoyama, Kyoto (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Aug. 9, 2022, as Appl. No. 17/884,290.
Application 17/884,290 is a continuation of application No. 17/080,932, filed on Oct. 27, 2020, granted, now 11,443,901.
Application 17/080,932 is a continuation of application No. PCT/JP2019/019822, filed on May 20, 2019.
Claims priority of application No. 2018-096710 (JP), filed on May 21, 2018.
Prior Publication US 2022/0392713 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01G 9/035 (2006.01); H01G 9/028 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/028 (2013.01) [H01G 9/035 (2013.01); H01G 9/15 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electrolytic capacitor comprising:
an anode body having a dielectric layer disposed on a surface of the anode body;
a solid electrolyte layer that is in contact with the dielectric layer, the solid electrolyte layer including a conductive polymer; and
an electrolytic solution, wherein:
the electrolytic solution contains a solvent, a first base component, a second base component, a first acid component, and a second acid component,
the solvent includes a glycol compound,
the first base component includes an amidine compound,
the second base component includes a primary amine compound,
the first acid component includes a composite compound of an inorganic acid and an organic acid,
the second acid component includes at least one selected from a group consisting of boric acid, phosphoric acid, phosphorous acid, hypophosphorous acid, and phosphonic acid,
a content proportion of a total amount of the first base component and the first acid component in the electrolytic solution ranges from 5 wt % to 30 wt %, inclusive, and
a pH of the electrolytic solution ranges from 1.5 to 5.5, inclusive.