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    Electrochemical cell including cathode with main phase of perovskite oxide and second phase of SrSO4 and (Co, Fe)3O4
    1.
    发明授权
    Electrochemical cell including cathode with main phase of perovskite oxide and second phase of SrSO4 and (Co, Fe)3O4 有权

    公开(公告)号：US11211627B2

    公开(公告)日：2021-12-28

    申请号：US16299865

    申请日：2019-03-12

    Applicant: NGK INSULATORS, LTD.

    Inventor： Makoto Ohmori ,  Shinji Fujisaki ,  Takashi Ryu

    IPC: H01M8/1246 ,  H01M8/0217 ,  H01M8/124

    Abstract: The electrochemical cell according to the present invention has an anode, a cathode, and a solid electrolyte layer disposed between the anode and the cathode. The cathode includes a solid electrolyte layer-side region within 3 μm from a surface on the solid electrolyte layer side. The solid electrolyte layer-side region has a main phase that is configured by a perovskite oxide, and a second phase that is configured by SrSO4 and (Co, Fe)3O4. The perovskite oxide is expressed by the general formula ABO3 and contains at least one of Sr and La at the A site. The (Co, Fe)3O4 contained in the electrolyte layer-side region contains Co and Fe. An occupied surface area ratio of the second phase in a cross section of the solid electrolyte layer-side region is less than or equal to 10.5%.

    ELECTROCHEMICAL CELL
    3.
    发明申请
    ELECTROCHEMICAL CELL 审中-公开

    公开(公告)号：US20190207240A1

    公开(公告)日：2019-07-04

    申请号：US16299865

    申请日：2019-03-12

    Applicant: NGK INSULATORS, LTD.

    Inventor： Makoto Ohmori ,  Shinji Fujisaki ,  Takashi Ryu

    IPC: H01M8/1246

    CPC classification number: H01M8/1246 ,  H01M2008/1293 ,  H01M2300/0074

    Abstract: The electrochemical cell according to the present invention has an anode, a cathode, and a solid electrolyte layer disposed between the anode and the cathode. The cathode includes a solid electrolyte layer-side region within 3 μm from a surface on the solid electrolyte layer side. The solid electrolyte layer-side region has a main phase that is configured by a perovskite oxide, and a second phase that is configured by SrSO4 and (Co, Fe)3O4. The perovskite oxide is expressed by the general formula ABO3 and contains at least one of Sr and La at the A site. The (Co, Fe)3O4 contained in the electrolyte layer-side region contains Co and Fe. An occupied surface area ratio of the second phase in a cross section of the solid electrolyte layer-side region is less than or equal to 10.5%.

    Fuel cell
    4.
    发明授权
    Fuel cell 有权

    公开(公告)号：US11532825B2

    公开(公告)日：2022-12-20

    申请号：US15287819

    申请日：2016-10-07

    Applicant: NGK INSULATORS, LTD.

    Inventor： Shinji Fujisaki ,  Noriyuki Ogasawara ,  Makoto Ohmori

    IPC: H01M4/86 ,  H01M4/90 ,  H01M8/1253 ,  H01M8/12

    Abstract: A fuel cell comprises an anode, a cathode, and a solid electrolyte layer disposed between the anode and the cathode. The cathode includes a main phase configured by a perovskite oxide including at least one of La or Sr at the A site and that is expressed by the general formula ABO3, and a secondary phase configured by strontium oxide. The occupied surface area ratio of the secondary phase in a cross section of the cathode is greater than or equal to 0.05% and less than or equal to 3%.

    Fuel cell
    6.
    发明授权
    Fuel cell 有权

    公开(公告)号：US10033059B2

    公开(公告)日：2018-07-24

    申请号：US15350671

    申请日：2016-11-14

    Applicant: NGK INSULATORS, LTD.

    Inventor： Makoto Ohmori ,  Ayano Kobayashi ,  Shinji Fujisaki

    IPC: H01M8/12 ,  H01M8/1253 ,  B32B18/00 ,  C04B35/486 ,  C04B35/50 ,  H01M8/1213 ,  H01M8/126 ,  H01M8/124

    Abstract: A fuel cell comprises an anode, a cathode, and a solid electrolyte layer. The solid electrolyte layer includes a first region disposed on the anode and a second region disposed between the first region and the cathode. The ratio of the ceria-based material in the first region is less than or equal to 0.5%. The ratio of the tetragonal crystal zirconia in the first region is greater than or equal to 3.0%. The atomic weight ratio of nickel to zirconia in the first region is less than or equal to 3.0 at %. The ratio of the ceria-based material in the second region is greater than or equal to 1.0%. The ratio of the tetragonal crystal zirconia in the second region is less than or equal to 0.1%.

    Electrochemical cell
    7.
    发明授权
    Electrochemical cell 有权

    公开(公告)号：US11637342B2

    公开(公告)日：2023-04-25

    申请号：US16909284

    申请日：2020-06-23

    Applicant: NGK INSULATORS, LTD.

    Inventor： Shinji Fujisaki ,  Takashi Ryu ,  Makoto Ohmori

    IPC: H01M12/08 ,  H01M4/90 ,  H01M8/1213 ,  H01M8/12 ,  H01M8/2425

    Abstract: An electrochemical cell includes a fuel electrode, an air electrode containing a perovskite type oxide as a main component, the perovskite type oxide being represented by a general formula ABO3 and containing La and Sr at an A site, and a solid electrolyte layer arranged between the fuel electrode and the air electrode. The air electrode includes a first portion and a second portion, the first portion being located on a side opposite to the solid electrolyte layer, the second portion being located on the solid electrolyte layer side. A first ratio of an La concentration to an Sr concentration detected at the first portion through Auger electron spectroscopy is at least 1.1 times a second ratio of an La concentration to an Sr concentration detected at the second portion through Auger electron spectroscopy.

    Fuel cell
    8.
    发明授权
    Fuel cell 有权

    公开(公告)号：US10535882B2

    公开(公告)日：2020-01-14

    申请号：US15869949

    申请日：2018-01-12

    Applicant: NGK INSULATORS, LTD.

    Inventor： Makoto Ohmori ,  Shinji Fujisaki

    IPC: H01M8/1213 ,  H01M4/90 ,  H01M4/02

    Abstract: A fuel cell has an anode, a cathode, and a solid electrolyte layer. The cathode contains a main component containing a perovskite oxide which is expressed by the general formula ABO3 and includes at least one of La and Sr at the A site. The solid electrolyte layer is disposed between the anode and the cathode. The cathode includes an interface region that is within 5 μm from a surface near to the solid electrolyte layer. The interface region contains a main phase containing the perovskite oxide, and a secondary phase containing strontium oxide. An occupied surface area ratio of the secondary phase in a cross section of the interface region is greater than or equal 0.05% and less than or equal to 3%.

    Electrochemical cell
    10.
    发明授权
    Electrochemical cell 有权

    公开(公告)号：US11380902B2

    公开(公告)日：2022-07-05

    申请号：US16210432

    申请日：2018-12-05

    Applicant: NGK INSULATORS, LTD.

    Inventor： Shinji Fujisaki ,  Takashi Ryu ,  Makoto Ohmori

    IPC: H01M4/86 ,  H01M8/1246 ,  H01M8/12 ,  C04B35/26 ,  H01M8/1213

    Abstract: The electrochemical cell has an anode, a cathode, and a solid electrolyte layer. The cathode contains a perovskite oxide expressed by the general formula ABO3 and includes at least one of Sr and La at the A site as a main component. The solid electrolyte layer is disposed between the anode and the cathode. The cathode includes a solid electrolyte layer-side region within 3 μm from a surface of the solid electrolyte layer side. The solid electrolyte layer-side region includes a main phase which is configured by the perovskite oxide and a second phase which is configured by Co3O4 and (Co, Fe)3O4. An occupied surface area ratio of the second phase in a cross section of the solid electrolyte layer-side region is less than or equal to 10.5%.

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