公开(公告)号：US20230052473A1

公开(公告)日：2023-02-16

申请号：US17960964

申请日：2022-10-06

Applicant: TOPPAN INC.

Inventor： Katsuyuki KISHI

IPC: H01M8/1004 ,  H01M8/1067 ,  H01M8/1065

Abstract: A membrane electrode assembly that can enhance power generation performance, and a polymer electrolyte fuel cell. The membrane electrode assembly for use in a polymer electrolyte fuel cell according to an aspect of the present invention includes a polyelectrolyte membrane, a fuel electrode-side electrocatalyst layer, and an oxygen electrode-side electrocatalyst layer. The fuel electrode- and oxygen electrode-side electrocatalyst layers and contain voids which include pores having a diameter in the range of 3 nm or more and 5.5 μm or less. When the integrated pore volume for all the pores in the fuel electrode- and oxygen electrode-side electrocatalyst layers and is a first integrated volume, the value obtained by dividing the first integrated volume by the mass of the catalytic material contained in both of the electrocatalyst layers is in the range of 2.8 or more and 4.5 or less.

公开(公告)号：US20230387441A1

公开(公告)日：2023-11-30

申请号：US18232786

申请日：2023-08-10

Applicant: TOPPAN INC.

Inventor： Katsuyuki KISHI

IPC: H01M8/1018 ,  H01M4/92 ,  H01M4/88

CPC classification number: H01M8/1018 ,  H01M4/926 ,  H01M4/8807 ,  H01M2008/1095

Abstract: A membrane electrode assembly includes: a polymer electrolyte membrane; a first electrocatalyst layer and a second electrocatalyst layer sandwiching the polymer electrolyte membrane while being in contact therewith; a fuel electrode diffusion layer which is a gas diffusion layer laminated on the first electrocatalyst layer to form a fuel electrode; and an air electrode diffusion layer which is a gas diffusion layer laminated on the second electrocatalyst layer to form an air electrode. The air electrode diffusion layer has a Gurley value of 80 seconds or less in a thickness direction thereof, which is smaller than a Gurley value of the fuel electrode diffusion layer in a thickness direction thereof, the Gurley value indicating air permeability.