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：US20230317968A1

公开(公告)日：2023-10-05

申请号：US18207536

申请日：2023-06-08

Applicant: TOPPAN INC.

Inventor： Madoka OZAWA ,  Atsuhiro KAWAMURA

IPC: H01M4/90 ,  H01M8/1039 ,  H01M8/1004

CPC classification number: H01M4/9083 ,  H01M8/1039 ,  H01M8/1004 ,  H01M2008/1095

Abstract: An electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell, which are capable of improving material transport properties and proton conductivity in the electrode catalyst layer, and which are capable of exhibiting high power generation performance over the long term and have good durability. The electrode catalyst layer for use in a polymer electrolyte fuel cell, and includes: a catalyst material; a conductive carrier that supports the catalyst material; a polymer electrolyte; and a fibrous material, wherein the fibrous material contains a material having nitrogen atoms, and the content of the fibrous material in the electrode catalyst layer is 1 wt % or more and less than 12 wt %.

公开(公告)号：US20230155154A1

公开(公告)日：2023-05-18

申请号：US18095610

申请日：2023-01-11

Applicant: TOPPAN INC.

Inventor： Madoka OZAWA

IPC: H01M8/103 ,  H01M4/92 ,  H01M8/1018 ,  H01M8/1004

CPC classification number: H01M8/103 ,  H01M4/926 ,  H01M8/1018 ,  H01M8/1004 ,  H01M2008/1095

Abstract: To provide an electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell capable of improving the mass transport properties and proton conduction properties in the electrode catalyst layer and exhibiting high power generation performance for a longer time. An electrode catalyst layer according to an embodiment of the present invention is an electrode catalyst layer configured to be bonded to a polymer electrolyte membrane for use in a polymer electrolyte fuel cell, the electrode catalyst layer including: a catalytic substance; a conductive carrier supporting the catalytic substance; a polymer electrolyte; and one or more types of fibers containing at least a polymer fiber, wherein, among the fibers, the number of fibers having an axis inclination θ of 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.

公开(公告)号：US20230275239A1

公开(公告)日：2023-08-31

申请号：US18122438

申请日：2023-03-16

Applicant: TOPPAN INC.

Inventor： Hiroyuki CHINONE ,  Madoka OZAWA

IPC: H01M4/92 ,  H01M8/1018 ,  H01M8/1065

CPC classification number: H01M4/926 ,  H01M8/1018 ,  H01M8/1065 ,  H01M2008/1095

Abstract: An object is to provide an electrode catalyst layer, a membrane electrode assembly, and a polymer electrolyte fuel cell that can suppress decrease in durability of the membrane electrode assembly and decrease in power generation performance of the polymer electrolyte fuel cell by suppressing crack generation in the electrode catalyst layer. An electrode catalyst layer according to one aspect of the present invention is an electrode catalyst layer including at least: a catalytic substance; aggregates of polymer electrolytes; and polymer electrolyte fibers. In the electrode catalyst layer, an amount of phosphorus and an amount of platinum defined via elemental analysis by energy dispersive X-ray spectroscopy (EDX) satisfy a following equation (1). 0