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    • 2. 发明申请
    • GAS DIFFUSION LAYER OF PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEM
    • 原子交换膜燃料电池系统的气体扩散层
    • US20090297919A1
    • 2009-12-03
    • US12469908
    • 2009-05-21
    • Chun-Wei PengChin-Yuan Chiu
    • Chun-Wei PengChin-Yuan Chiu
    • H01M2/00
    • H01M8/0202H01M2008/1095
    • A fuel cell unit of a proton exchange membrane fuel cell system includes a pair of flow field plates and a membrane electrode assembly. The membrane electrode assembly is interposed between the pair of flow field plates to define respective reactant flow channels with the pair of flow field plates. The membrane electrode assembly includes an anode catalyst layer, a cathode catalyst layer, a proton exchange membrane and a pair of gas diffusion layers. The gas diffusion layers are respectively disposed adjacent to the anode catalyst layer and the cathode catalyst layer and face to the flow field plates. At least one of the gas diffusion layers has a fluid permeability distribution profile increasing first and then decreasing from an inlet to an outlet of the reactant flow channel. The gas diffusion layer has the maximum fluid permeability at the site with the highest rate of reaction.
    • 质子交换膜燃料电池系统的燃料电池单元包括一对流场板和膜电极组件。 膜电极组件插入在该对流场板之间以与该对流场板形成相应的反应物流动通道。 膜电极组件包括阳极催化剂层,阴极催化剂层,质子交换膜和一对气体扩散层。 气体扩散层分别设置为与阳极催化剂层和阴极催化剂层相邻并且面向流场板。 气体扩散层中的至少一个具有首先增加的流体渗透率分布分布,然后从反应物流动通道的入口到出口减小。 气体扩散层在反应速度最快的部位具有最大的流体渗透性。