公开(公告)号：US20230377807A1

公开(公告)日：2023-11-23

申请号：US18360528

申请日：2023-07-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuichiro TSUBAKI ,  Tatsuji AOYAMA ,  Kazuyo SAITO ,  Yuji OTSUKA

IPC: H01G9/035 ,  H01G9/028

CPC classification number: H01G9/035 ,  H01G9/028 ,  H01G9/048

Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer. 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 at least one of (i) a mixture of polyoxyethylene and polyoxypropylene and (ii) an oxyethylene-oxypropylene copolymer. In the polyalkylene glycol, a molar ratio m/n of oxyethylene units to oxypropylene units is greater than 1.

公开(公告)号：US20240304396A1

公开(公告)日：2024-09-12

申请号：US18263093

申请日：2022-01-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsuhisa YOSHIMURA ,  Toshifumi KADOKAWA ,  Masami TSUBAKI ,  Yuji OTSUKA

IPC: H01G9/055 ,  H01G9/145 ,  H01G9/15

CPC classification number: H01G9/055 ,  H01G9/145 ,  H01G9/151

Abstract: An electrode foil for an electrolytic capacitor includes a metal foil that includes a porous portion and a core portion continuous to the porous portion. The metal foil has a main surface in which pores in the porous portion are open. The porous portion includes a plurality of recessed portions that are open in the main surface and distributed in a dot pattern in an in-plane direction of the metal foil. The pores in the porous portion have an opening length smaller than 2 μm, and the recessed portions have an opening length of 2 μm or more.

公开(公告)号：US20220189705A1

公开(公告)日：2022-06-16

申请号：US17688359

申请日：2022-03-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuichiro TSUBAKI ,  Tatsuji AOYAMA ,  Kazuyo SAITO ,  Yuji OTSUKA

IPC: H01G9/035 ,  H01G9/028

Abstract: An electrolytic capacitor includes a capacitor element and an electrolytic solution. The capacitor element includes: an anode body including a dielectric layer; a cathode body; and a solid electrolyte in contact with the dielectric layer. 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 at least one of (i) a mixture of polyoxyethylene and polyoxypropylene and (ii) an oxyethylene-oxypropylene copolymer. In the polyalkylene glycol, a molar ratio m/n of oxyethylene units to oxypropylene units is greater than 1.

公开(公告)号：US20240371575A1

公开(公告)日：2024-11-07

申请号：US18292788

申请日：2022-07-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsuhisa YOSHIMURA ,  Toshifumi KADOKAWA ,  Masami TSUBAKI ,  Yuji OTSUKA

IPC: H01G9/055

Abstract: An electrode foil for an electrolytic capacitor includes a metal foil that includes a porous portion and a core portion continuous to the porous portion. The metal foil has a main surface in which pores in the porous portion are open. The porous portion includes a plurality of recessed portions that are open in the main surface and distributed in a dot pattern in an in-plane direction of the metal foil. The pores in the porous portion have an opening diameter smaller than 2 μm, recessed portions that are adjacent to each other have an opening diameter D1 μm and an opening diameter D2 μm, respectively, and are spaced apart from each other by a distance L μm, and the opening diameter D1 and the distance L satisfy 2≤D1 and 2≤L/D1≤50. The opening diameter D2 and the distance L satisfy 2≤D2 and 2≤L/D2≤50.