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    Membrane electrode assembly and fuel cell comprising core-shell catalyst
    2.
    发明授权
    Membrane electrode assembly and fuel cell comprising core-shell catalyst 有权

    公开(公告)号：US11145873B2

    公开(公告)日：2021-10-12

    申请号：US16479881

    申请日：2018-02-19

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Kazuya Yamasaki ,  Hitoshi Ishimoto ,  Motohiro Sakata

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

    Abstract: A membrane electrode assembly includes an electrolyte membrane, and a pair of electrodes sandwiching the electrolyte membrane. The pair of electrodes each include a catalyst layer, and a gas diffusion layer disposed on the catalyst layer on an opposite side to the electrolyte membrane. At least one of the catalyst layers contains first catalyst particles, and second catalyst particles. The first catalyst particles are either platinum particles or platinum alloy particles, or both. The second catalyst particles are core-shell particles having a core part and a shell part, the core part formed of at least one selected from transition metals other than platinum, the shell part covering the core part and formed of at least one of platinum and a platinum alloy. In the catalyst layer, the second catalyst particles are present in a smaller percentage in an electrolyte membrane side than they are in a gas diffusion layer side.

    Cathode catalyst layer for fuel cell and fuel cell
    5.
    发明授权
    Cathode catalyst layer for fuel cell and fuel cell 有权

    公开(公告)号：US12068487B2

    公开(公告)日：2024-08-20

    申请号：US17436577

    申请日：2020-02-26

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hiroaki Suzuki ,  Kazuya Yamasaki ,  Hitoshi Ishimoto

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

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

    Abstract: A cathode catalyst layer has two layers: a first catalyst layer on a gas diffusion layer side, and a second catalyst layer on an electrolyte membrane side. The first catalyst layer includes a first particulate conductive member, first catalyst particles, and a first fibrous conductive member, at least part of the first catalyst particles being supported on the first particulate conductive member. The second catalyst layer includes a second particulate conductive member and second catalyst particles, at least part of the second catalyst particles being supported on the second particulate conductive member. A catalyst support density D2 of the second catalyst particles on the second particulate conductive member is greater than a catalyst support density D1 of the first catalyst particles on the first particulate conductive member.

    Membrane electrode assembly and fuel cell
    9.
    发明授权
    Membrane electrode assembly and fuel cell 有权

    公开(公告)号：US11569519B2

    公开(公告)日：2023-01-31

    申请号：US16488193

    申请日：2018-02-09

    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

    Inventor： Hitoshi Ishimoto ,  Kazuya Yamasaki ,  Motohiro Sakata

    IPC: H01M8/1004 ,  H01M4/86 ,  H01M4/02

    Abstract: A membrane electrode assembly includes an electrolyte membrane, and a pair of electrode layers which sandwich the electrolyte membrane. The pair of electrode layers include a pair of catalyst layers which sandwich the electrolyte membrane, and a pair of gas diffusion layers disposed on the pair of catalyst layers on opposite sides to the electrolyte membrane. At least one catalyst layer contains a fibrous electric conductor, catalyst particles, a particulate electric conductor, and a proton-conductive resin. The at least one catalyst layer has a first region at a distance of 200 nm or less from the fibrous electric conductor, and a second region at a distance of more than 200 nm from the fibrous electric conductor. Pores are present in the first and second regions. A mode diameter M1 of the pores in the first region and a mode diameter M2 of the pores in the second region satisfy M1

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