Fuel cell electrode having increased oxygen concentration and methods of preparing electrode

    公开(公告)号:US10381652B2

    公开(公告)日:2019-08-13

    申请号:US15452177

    申请日:2017-03-07

    Abstract: A membrane electrode assembly includes a membrane, a gas diffusion layer and a catalyst layer between the membrane and the gas diffusion layer. The catalyst layer comprises catalyst comprising active catalyst particles supported on support particles, a proton conducting ionomer and a phospholipid containing soluble oxygen. One method of preparation includes preparing a catalyst solution comprising a solvent and catalyst, adding proton conducting ionomer to the catalyst solution to form a catalyst ink, saturating a solution of solvent and a phospholipid with oxygen and mixing the saturated phospholipid with the catalyst ink.

    Cathode Having Active Catalyst Particles Supported on Nanotubes and Methods of Making the Same

    公开(公告)号:US20180219230A1

    公开(公告)日:2018-08-02

    申请号:US15420935

    申请日:2017-01-31

    Abstract: Methods of preparing a cathode for a fuel cell include growing nanotubes on a substrate, the nanotubes of a material that is electron conductive; aligning the nanotubes such that the nanotubes extend from the substrate with a free distal end opposite the substrate; and depositing an active catalyst particle on the free distal end of each of the nanotubes. A membrane electrode assembly includes a cathode comprising a layer of electron conducting nanotubes extending from the electrode membrane and aligned such that a free distal end of each electron conducting nanotube is closer to the gas diffusion layer than the electrode membrane; an active catalyst particle attached to the free distal end of each electron conducting nanotube, wherein a diameter of the active catalyst particle is greater than a diameter of a respective electron conducting nanotube; and ionomer between each active catalyst particle and the gas diffusion layer.

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