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    Gas diffusion structures and gas diffusion electrodes for polymer electrolyte fuel cells
    4.
    发明授权
    Gas diffusion structures and gas diffusion electrodes for polymer electrolyte fuel cells 失效
    用于聚合物电解质燃料电池的气体扩散结构和气体扩散电极

    公开(公告)号：US06803143B2

    公开(公告)日：2004-10-12

    申请号：US09844677

    申请日：2001-04-30

    申请人： Ralf Zuber ,  Armin Bayer ,  Knut Fehl ,  Volker Bänisch ,  Thomas Lehmann

    发明人： Ralf Zuber ,  Armin Bayer ,  Knut Fehl ,  Volker Bänisch ,  Thomas Lehmann

    IPC分类号： H01M486

    CPC分类号： H01M4/96 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0245 ,  H01M8/1004 ,  H01M8/1007 ,  H01M2300/0082 ,  Y02P70/56

    摘要： A gas diffusion structure for polymer electrolyte fuel cells having a sheet-like carbon substrate made hydrophobic and having two main opposing surfaces and a contact layer on one of these surfaces. The contact layer is formed of an intimate mixture of at least one hydrophobic polymer, which can be polyethylene, polypropylene or polytetrafluoroethylene, and finely divided carbon particles, wherein the weight percentage of the carbon particles relative to the total weight of the contact layer amounts to 40 to 90 wt. %. The gas diffusion structure is a carbon substrate made hydrophobic by at least one hydrophobic polymer and the hydrophobic polymers are restricted to two layers extending from both opposing surfaces into the carbon substrate down to a depth of from 5 to 40 &mgr;m and the hydrophobic polymers fill of from 20 to 60% of the pore volume within those layers.

    摘要翻译： 一种用于聚合物电解质燃料电池的气体扩散结构，其具有疏水性并具有两个主要相对表面的片状碳基底和在这些表面之一上的接触层。 接触层由至少一种疏水性聚合物（其可以是聚乙烯，聚丙烯或聚四氟乙烯）和细碎的碳颗粒的紧密混合物形成，其中碳颗粒相对于接触层的总重量的重量百分比等于 40〜90重量％ ％。 气体扩散结构是通过至少一种疏水性聚合物疏水化的碳底物，并且疏水性聚合物被限制为从两个相对表面延伸到碳衬底中的深度为5至40μm的两层，疏水性聚合物填充 在这些层内的孔体积的20至60％。

    Water-based catalyst inks and their use for manufacture of catalyst-coated substrates
    5.
    发明授权
    Water-based catalyst inks and their use for manufacture of catalyst-coated substrates 有权
    水性催化剂油墨及其制备催化剂涂覆基材的用途

    公开(公告)号：US06844286B2

    公开(公告)日：2005-01-18

    申请号：US10629442

    申请日：2003-07-28

    申请人： Joachim Köhler ,  Volker Bänisch

    发明人： Joachim Köhler ,  Volker Bänisch

    IPC分类号： C09D11/00 ,  B01J23/42 ,  B01J37/02 ,  C25B9/10 ,  H01M4/86 ,  H01M4/88 ,  H01M8/10 ,  B01J21/18 ,  B01J23/40

    CPC分类号： H01M4/8828 ,  B01J23/42 ,  B01J37/0219 ,  C25B9/10 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/8821 ,  H01M4/8835 ,  H01M4/8882

    摘要： The present invention relates to water-based catalyst inks and their use for manufacture of catalyst-coated substrates. According to the present invention, a catalyst layer is applied to the hydrophobic surface of a substrate by using a water-based catalyst ink comprising an electrocatalyst, an ionomer and water. The catalyst ink also comprises a highly volatile surfactant having a vapor pressure at ambient temperature in the range of 1 to 600 Pa. The use of this surfactant allows applying the water-based ink to the hydrophobic surface of a variety of substrates, such as gas diffusion layers, advanced ionomer membranes and polymer substrates. The required coating deposit can be applied in one coating pass and the resulting catalyst layer exhibits improved performance due to the absence of residual surfactant in the catalyst layer.

    摘要翻译： 本发明涉及水基催化剂油墨及其制备催化剂涂覆基材的用途。 根据本发明，通过使用包含电催化剂，离聚物和水的水性催化剂油墨将催化剂层施加到基材的疏水性表面。 催化剂油墨还包括在环境温度为1至600Pa范围内的蒸汽压的高挥发性表面活性剂。使用该表面活性剂可将水性油墨施加到各种基材例如气体的疏水表面 扩散层，高级离聚物膜和聚合物基材。 所需的涂层沉积物可以在一个涂布道次中施加，并且由于在催化剂层中不存在残留的表面活性剂，所得催化剂层表现出改进的性能。