公开(公告)号：US20220173419A1

公开(公告)日：2022-06-02

申请号：US17591826

申请日：2022-02-03

Applicant: TOPPAN INC.

Inventor： Hiroyuki MORIOKA

IPC: H01M8/1004 ,  H01M4/90 ,  H01M4/88

Abstract: A fuel cell membrane electrode assembly includes a polymer electrolyte membrane and a pair of electrocatalyst layers arranged to have the polymer electrolyte membrane therebetween, at least one of the pair of electrocatalyst layers includes particles supporting a catalyst which is composed of a noble metal component, a polymer electrolyte, and a fibrous oxide-based catalytic material, and the fibrous oxide-based catalytic material includes at least one transition metal element selected from a group consisting of Ta, Nb, Ti, and Zr.

公开(公告)号：US20230130095A1

公开(公告)日：2023-04-27

申请号：US18086538

申请日：2022-12-21

Applicant: HIROSAKI UNIVERSITY ,  TOPPAN INC.

Inventor： Mitsuharu CHISAKA ,  Yutaka SUZUKI ,  Hiroyuki MORIOKA ,  Madoka OZAWA

IPC: H01M4/90 ,  H01M8/1018

Abstract: The present disclosure provides a fibrous rutile-type oxide that contains an oxygen atom, a nitrogen atom, and a transition metal atom. The transition metal atom is at least one atom selected from the group consisting of a titanium atom, a tantalum atom, a niobium atom, and a zirconium atom. The rutile-type oxide is represented by the chemical formula MOxNy, where M represents the transition metal atom. In the chemical formula, x satisfies x = 2 - (y +j) (j ≥ 0).

公开(公告)号：US20230395814A1

公开(公告)日：2023-12-07

申请号：US18233712

申请日：2023-08-14

Applicant: TOPPAN INC.

Inventor： Yutaka SUZUKI ,  Hiroyuki MORIOKA ,  Madoka OZAWA

IPC: H01M4/86 ,  H01M4/92 ,  H01M4/90 ,  H01M8/1004 ,  H01M8/1018

CPC classification number: H01M4/8657 ,  H01M4/92 ,  H01M4/9016 ,  H01M8/1004 ,  H01M8/1018 ,  H01M2008/1095

Abstract: An electrode catalyst layer has a first surface configured to be in contact with a polymer electrolyte membrane in a membrane electrode assembly, and a second surface facing away from the first surface. The electrode catalyst layer includes a first portion including the first surface, and a second portion having a layer shape and being laminated on the first portion. The electrode catalyst layer contains a first catalyst containing platinum and a second catalyst containing transition metal oxide. The first catalyst has catalytic activity higher than that of the second catalyst. A density of the first catalyst in the electrode catalyst layer is highest in a region including the first surface in the first portion. A maximum value of the density of the first catalyst in the second portion is smaller than a minimum value of the density of the first catalyst in the first portion.