US 12,354,811 B2
Solid electrolytic capacitor element and solid electrolytic capacitor
Masatoshi Takeshita, Osaka (JP); Hiromi Ozawa, Osaka (JP); Yihan Zhang, Osaka (JP); and Hitoshi Fukui, Saga (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 18/004,612
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jul. 15, 2021, PCT No. PCT/JP2021/026539
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/024771, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-130168 (JP), filed on Jul. 31, 2020.
Prior Publication US 2023/0245836 A1, Aug. 3, 2023
Int. Cl. H01G 9/025 (2006.01); H01G 9/15 (2006.01)
CPC H01G 9/025 (2013.01) [H01G 9/15 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A solid electrolytic capacitor element comprising:
an anode body;
a dielectric layer disposed on a surface of the anode body; and
a cathode part covering at least a part of the dielectric layer,
wherein:
the cathode part includes a solid electrolyte layer covering the at least the part of the dielectric layer,
the solid electrolyte layer contains a first polymer component and a second polymer component, the first polymer component including a monomer unit corresponding to a thiophene compound, the second polymer component including a polymer anion,
a weight-average molecular weight of the polymer anion ranges from 300 to 250,000, inclusive, and
a Raman spectrum of a surface layer in the solid electrolyte layer has a peak characteristic for the first polymer component.