Catalytic electrode with gradient porosity and catalyst density for fuel cells
    28.
    发明授权
    Catalytic electrode with gradient porosity and catalyst density for fuel cells 有权
    催化电极具有梯度孔隙率和燃料电池的催化剂密度

    公开(公告)号:US08703355B2

    公开(公告)日:2014-04-22

    申请号:US12839124

    申请日:2010-07-19

    IPC分类号: H01M8/10 H01M4/88

    摘要: A membrane electrode assembly (MEA) for a fuel cell comprising a gradient catalyst structure and a method of making the same. The gradient catalyst structure can include a plurality of catalyst nanoparticles, e.g., platinum, disposed on layered buckypaper. The layered buckypaper can include at least a first layer and a second layer and the first layer can have a lower porosity compared to the second layer. The gradient catalyst structure can include single-wall nanotubes, carbon nanofibers, or both in the first layer of the layered buckypaper and can include carbon nanofibers in the second layer of the layered buckypaper. The MEA can have a catalyst utilization efficiency of at least 0.35 gcat/kW or less.

    摘要翻译: 一种用于燃料电池的膜电极组件(MEA),其包括梯度催化剂结构及其制备方法。 梯度催化剂结构可以包括设置在分层压滤纸上的多个催化剂纳米颗粒,例如铂。 所述分层消音器可以包括至少第一层和第二层,并且与第二层相比,第一层可以具有较低的孔隙率。 梯度催化剂结构可以包括单层纳米管,碳纳米纤维或层状降压纸的第一层中的两者,并且可以在层叠的消泡剂的第二层中包括碳纳米纤维。 MEA的催化剂利用效率至少为0.35gcat / kW以下。