公开(公告)号：US20220336834A1

公开(公告)日：2022-10-20

申请号：US17849000

申请日：2022-06-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takeshi MINAMIURA ,  Kenichi EZAKI ,  Shinichiro IMURA ,  Tsutomu KAWASHIMA ,  Miyuki YOSHIMOTO

IPC: H01M8/1004 ,  H01M8/0263 ,  H01M8/026 ,  H01M4/86 ,  H01M4/90

Abstract: A membrane electrode assembly for a fuel cell, the membrane electrode assembly including an electrolyte membrane, and a first electrode and a second electrode sandwiching the electrolyte membrane, wherein the first electrode includes a first catalyst layer and a first gas diffusion layer in order from the electrolyte membrane side, the first gas diffusion layer includes a first fibrous conductive member and a first resin material, the first catalyst layer includes a second fibrous conductive member, catalyst particles, and a second resin material, when viewed from a stacking direction of the membrane electrode assembly, a first angle formed by the first fibrous conductive member and a main flow path of a gas supplied to the membrane electrode assembly is arbitrary, and a second angle formed by the second fibrous conductive member and the main flow path is 45° or less.

公开(公告)号：US20220359899A1

公开(公告)日：2022-11-10

申请号：US17849346

申请日：2022-06-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichiro IMURA ,  Takeshi MINAMIURA ,  Kenichi EZAKI ,  Tsutomu KAWASHIMA ,  Miyuki YOSHIMOTO

IPC: H01M8/1004 ,  H01M4/88 ,  H01M4/96

Abstract: A membrane electrode assembly for a fuel cell includes a catalyst layer having a first main surface and a second main surface, a gas diffusion layer disposed on a side of the first main surface, and an electrolyte membrane disposed on a side of the second main surface, wherein the gas diffusion layer includes a conductive material and a polymer resin, the conductive material comprises a fibrous carbon material, an average fiber diameter D of the fibrous carbon material is equal to or less than 25% of a thickness T of the catalyst layer, and in a cross section in a thickness direction of the catalyst layer, an arithmetic mean roughness Ra1 of the first main surface and an arithmetic mean roughness Ra2 of the second main surface satisfies the relation, Ra1>Ra2.