公开(公告)号：US11594745B2

公开(公告)日：2023-02-28

申请号：US16465114

申请日：2018-10-29

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Madoka Ozawa

IPC: H01M4/88 ,  H01M4/96 ,  H01M8/102

Abstract: Provided are an electrode catalyst layer, a membrane electrode assembly and a polymer electrolyte fuel cell, having sufficient drainage property and gas diffusibility with high power generation performance over a long term. An electrode catalyst layer (10) bonded to a surface of a polymer electrolyte membrane (11) includes at least a catalyst substance (12), a conductive carrier (13), a polymer electrolyte (14) and fibrous substances (15). The number of the fibrous substances (15) in which inclination θ of axes with respect to a surface of the electrode catalyst layer (10) bonded to the surface of the polymer electrolyte membrane (11) is 0°≤θ

公开(公告)号：US12176547B2

公开(公告)日：2024-12-24

申请号：US17478485

申请日：2021-09-17

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Hiroaki Koyama ,  Madoka Ozawa

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

Abstract: A catalyst layer for polymer electrolyte fuel cells that improves drainage or gas diffusion, reduces or prevents the occurrence of cracking in a catalyst layer, enhances catalyst utilization efficiency, exerts high output power and high energy conversion efficiency, and has high durability, and also provides a membrane-electrode assembly and a polymer electrolyte fuel cell using the catalyst layer. The catalyst layer for polymer electrolyte fuel cells contains a catalyst, carbon particles, a polymer electrolyte, and a fibrous material. In the catalyst layer, the carbon particles carry the catalyst1. The catalyst layer for polymer electrolyte fuel cells has voids. The percentage of frequencies of the voids having a cross-sectional area of 10,000 nm2 or more is 13% or more and 20% or less among the voids observed in a thickness-direction cross section of the catalyst layer for polymer electrolyte fuel cells perpendicular to the surface thereof.

公开(公告)号：US11677081B2

公开(公告)日：2023-06-13

申请号：US17030663

申请日：2020-09-24

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Madoka Ozawa ,  Hiroyuki Michi ,  Yuki Igarashi ,  Katsuyuki Kishi

IPC: H01M4/92 ,  H01M4/86 ,  H01M8/1004 ,  H01M8/10

CPC classification number: H01M4/926 ,  H01M4/8657 ,  H01M8/1004 ,  H01M2008/1095

Abstract: A membrane electrode assembly includes a polyelectrolyte membrane having a first surface and a second surface facing away from the first surface; a fuel-electrode-side electrocatalyst layer bonded to the first surface and containing a first catalytic material, a first electrically conductive carrier, and a first polyelectrolyte, the first electrically conductive carrier carrying the first catalytic material; and an oxygen-electrode-side electrocatalyst layer bonded to the second surface and containing a second catalytic material, a second electrically conductive carrier, a second polyelectrolyte, and a fibrous material, the second electrically conductive carrier carrying the second catalytic material. The membrane electrode assembly contains voids, the voids including pores each having a size in a range of 3 nm or more and 5.5 μm or less.

公开(公告)号：US11581546B2

公开(公告)日：2023-02-14

申请号：US17029662

申请日：2020-09-23

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Madoka Ozawa

IPC: H01M4/86 ,  H01M8/1004 ,  H01M8/10

Abstract: A catalyst layer comprising an interface to a polyelectrolyte membrane, the catalyst layer includes a layer forming material, which includes a catalytic substance, a conductive carrier which supports the catalytic substance, a polyelectrolyte, and a fibrous material, and a plurality of pores which contain no layer forming material. A pore area ratio which is a total area ratio of the plurality of pores to an area of a cross-section orthogonal to the interface is 25.0% or more and 35.0% or less in a cross-sectional image captured by a scanning electron microscope.

公开(公告)号：US11349131B2

公开(公告)日：2022-05-31

申请号：US17082896

申请日：2020-10-28

Applicant: TOPPAN PRINTING CO., LTD. ,  HIROSAKI UNIVERSITY

Inventor： Hiroyuki Morioka ,  Madoka Ozawa ,  Mitsuharu Chisaka

IPC: H01M4/90 ,  H01M4/86 ,  H01M4/92 ,  H01M8/1004 ,  H01M8/10

Abstract: Provided is a catalyst for fuel cells including an oxygen atom, a nitrogen atom, a pentavalent phosphorus atom, and a transition metal atom, in which when the transition metal atom is represented by M, the catalyst for fuel cells is represented by a chemical formula MOxNyPz, and the transition metal atom is at least one selected from the group consisting of a titanium atom, a tantalum atom, a niobium atom, and a zirconium atom.