公开(公告)号：US20230145058A1

公开(公告)日：2023-05-11

申请号：US17802065

申请日：2021-02-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro YOSHINO ,  Hiroaki SUZUKI ,  Hitoshi ISHIMOTO ,  Toshiyuki KATO ,  Masahiro UEDA

IPC: H01G9/042 ,  H01G9/025

CPC classification number: H01G9/042 ,  H01G9/025

Abstract: A method for producing an electrode for an electrolytic capacitor, the method including: a chemical conversion step of allowing a current to flow through a metal material containing a valve metal in a chemical conversion solution containing an electrolyte, to form an oxide film on a surface of the metal material, wherein the chemical conversion solution contains a nitrate-based compound as the electrolyte at a concentration of 0.03 mass % or more, and a phosphorus compound concentration in the chemical conversion solution is less than 0 01 mass %.

公开(公告)号：US20220172901A1

公开(公告)日：2022-06-02

申请号：US17598734

申请日：2020-02-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Norihiko OGATA ,  Yuma YANO ,  Kazuhide GOTOU ,  Yukiyasu SUGIHARA ,  Masayuki HOGIRI ,  Masahiro UEDA ,  Kazuhito ODANE

IPC: H01G9/012 ,  H01G9/15 ,  H01G9/028 ,  H01G9/00 ,  H01G9/052

Abstract: An electrolytic capacitor including a capacitor element that includes an anode body being porous, a dielectric layer formed on the surface of the anode body, and a solid electrolyte layer covering at least part of the dielectric layer. The anode body has a plurality of principal surfaces and a corner portion. The corner portion includes a plurality of side portions connecting between the principal surfaces, and one or more vertex portions connecting between the principal surfaces. A surface layer X of at least part of the corner portion is more compact in texture than a surface layer Y of the principal surface adjacent to the surface layer X.