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    POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE WATER ELECTROLYZER
    1.
    发明申请
    POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE WATER ELECTROLYZER 有权

    公开(公告)号：US20210381119A1

    公开(公告)日：2021-12-09

    申请号：US17407225

    申请日：2021-08-20

    Applicant: AGC Inc.

    Inventor： Takumi OKUYAMA ,  Takeshi HIRAI

    IPC: C25B13/08 ,  C25B1/04 ,  C25B9/23

    Abstract: To provide a polymer electrolyte membrane which can be applied to a polymer electrolyte water electrolyzer, and is capable of producing a polymer electrolyte water electrolyzer having a low electrolytic voltage and excellent in hydrogen gas recovery efficiency, as well as a membrane electrode assembly and a polymer electrolyte water electrolyzer obtainable by using it.
    The polymer electrolyte membrane of the present invention contains a polymer electrolyte, of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10%, is at most 2.4 x 10−9 cm3.cm/(s.cm2.cmHg), wherein the membrane resistance value under the conditions of a temperature of 80° C. and a relative humidity of 50%, is from 50 to 150 mn.cm2.

    MEMBRANE ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE MEMBRANE WATER ELECTROLYSIS AND WATER ELECTROLYZER
    2.
    发明公开
    MEMBRANE ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE MEMBRANE WATER ELECTROLYSIS AND WATER ELECTROLYZER 审中-公开

    公开(公告)号：US20240279824A1

    公开(公告)日：2024-08-22

    申请号：US18650655

    申请日：2024-04-30

    Applicant: AGC INC.

    Inventor： Takumi OKUYAMA

    IPC: C25B9/23 ,  C25B13/08

    CPC classification number: C25B9/23 ,  C25B13/08

    Abstract: Provided are a membrane electrode assembly for polymer electrolyte membrane water electrolysis and a water electrolyzer with which a low electrolysis voltage can be achieved and decomposition of the fluorinated polymer contained can be suppressed.
    A membrane electrode assembly for polymer electrolyte membrane water electrolysis, which comprises:



    a polymer electrolyte membrane comprising a fluorinated polymer having ion exchange groups,
    a cathode catalyst layer comprising a fluorinated polymer having ion exchange groups, provided on one side of the polymer electrolyte membrane, and
    an anode catalyst layer provided on the other side of the polymer electrolyte membrane,
    wherein when the membrane electrode assembly for polymer electrolyte membrane water electrolysis is observed from the normal direction of the surface, cerium ions are contained in a region overlapping the cathode catalyst layer, and
    the relation of the formula (X) is satisfied:













    (


    A
    Ce

    ×
    3

    )

    /

    A

    IEG
    ⁢
    _
    ⁢
    C



    ≤
    0.9




    formula
    ⁢


    (
    X
    )










    wherein ACe is the amount of substance (mol) of cerium ions contained in the above region, and AIEG_c is the amount of substance (mol) of the ion exchange groups of the fluorinated polymer contained in the cathode catalyst layer.

    LIQUID COMPOSITION, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL
    5.
    发明申请
    LIQUID COMPOSITION, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL 有权

    公开(公告)号：US20210296673A1

    公开(公告)日：2021-09-23

    申请号：US17333682

    申请日：2021-05-28

    Applicant: AGC Inc.

    Inventor： Susumu SAITO ,  Takumi OKUYAMA ,  Hiroyuki WATABE

    IPC: H01M8/1039 ,  H01M8/1067 ,  H01M8/1051 ,  C08L27/12 ,  C08K3/22

    Abstract: To provide a liquid composition capable of forming a polymer electrolyte membrane which is excellent in the initial power generation characteristics when made into a membrane electrode assembly, and which is excellent in durability and has few defects. This liquid composition comprises a liquid medium, a sulfonic acid group-containing fluorocarbon polymer and a hardly soluble cerium compound, wherein the ion exchange capacity of the sulfonic acid group-containing fluorocarbon polymer is from 1.36 to 2.50 meq/g dry resin, the average particle size of the hardly soluble cerium compound is from 1 nm to 3,000 nm, and the ratio of the total number of moles of cerium atoms in the hardly soluble cerium compound to the total number of moles of sulfonic acid groups in the sulfonic acid group-containing fluorocarbon polymer is from 0.001 to 0.3.

    LIQUID COMPOSITION, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL
    7.
    发明申请
    LIQUID COMPOSITION, POLYMER ELECTROLYTE MEMBRANE, MEMBRANE ELECTRODE ASSEMBLY AND POLYMER ELECTROLYTE FUEL CELL 有权

    公开(公告)号：US20210284813A1

    公开(公告)日：2021-09-16

    申请号：US17332145

    申请日：2021-05-27

    Applicant: AGC Inc.

    Inventor： Takumi OKUYAMA ,  Takeshi HIRAI ,  Susumu SAITO ,  Chikaya TAMITSUJI ,  Daisuke JOMUTA

    IPC: C08J5/22 ,  H01M8/1039 ,  H01M8/1004 ,  H01M8/1051 ,  C08L29/10

    Abstract: To provide a liquid composition capable of forming a membrane excellent in durability against hydrogen peroxide or peroxide radicals and excellent in hydrogen gas barrier property; a polymer electrolyte membrane; a membrane electrode assembly; and a polymer electrolyte fuel cell.
    Liquid composition comprising a liquid medium, an acid-type sulfonic acid group-containing fluorocarbon polymer of which the hydrogen gas permeation coefficient under the conditions of a temperature of 80° C. and a relative humidity of 10% is at most 2.5×10−9 cm3·cm/(s·cm2·cmHg), and cerium atoms; a polymer electrolyte membrane 15 comprising the acid-type sulfonic acid group-containing fluorocarbon polymer, and cerium atoms; and a membrane electrode assembly 10 comprising an anode 13 having a catalyst layer, a cathode 14 having a catalyst layer, and the polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14.

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