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首页> 外文会议>11th fuel cell science, engineering, and technology conference 2013 >IMPACT OF GAS DIFFUSION LAYER PROPERTIES ON LIQUID WATER BREAKTHROUGH PRESSURE IN POLYMER ELECTROLYTE FUEL CELL
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IMPACT OF GAS DIFFUSION LAYER PROPERTIES ON LIQUID WATER BREAKTHROUGH PRESSURE IN POLYMER ELECTROLYTE FUEL CELL

机译：气体扩散层特性对聚合物电解质燃料电池中液体透湿压力的影响

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摘要

Liquid water transport through gas diffusion layers (GDLs) with different thicknesses and different amounts of polytetraflu-oroethylene (PTFE) is studied by taking an ex-situ approach. Droplet static contact angles on GDLs were also measured. Using a constant flow syringe pump, liquid water was introduced to the surface of GDL sample and the breakthrough pressure at which liquid water passes through the GDL and forms droplet on the other side of the GDL was measured by a differential pressure transducer. Liquid water can pass through the pores when its pressure exceeds the capillary pressure. It was observed that the breakthrough pressure increases with GDL thickness. Also, applying some amount of PTFE to an untreated GDL was observed to significantly increase the breakthrough pressure while more amount of PTFE within the GDL had negligible effect on liquid water breakthrough pressure. Using measured breakthrough pressures and contact angles, maximum pore diameter of GDLs were calculated based on the GDL's single layer model.
机译：通过采用异位方法研究了液态水通过不同厚度和不同数量的聚四氟乙烯（PTFE）的气体扩散层（GDL）的传输。还测量了GDL上的液滴静态接触角。使用恒流注射泵，将液态水引入GDL样品的表面，并通过差压传感器测量液态水通过GDL并在GDL另一侧形成液滴的突破压力。当液态水的压力超过毛细管压力时，液态水可以通过孔。观察到突破压力随着GDL厚度的增加而增加。另外，观察到在未处理的GDL上施加一定量的PTFE会显着增加突破压力，而GDL中更多的PTFE对液态水的突破压力的影响可忽略不计。使用测得的穿透压力和接触角，根据GDL的单层模型计算出GDL的最大孔径。

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  • 来源
  • 会议地点 Minneapolis MN(US)
  • 作者

    Mehdi Mortazavi; Kazuya Tajiri;

  • 作者单位

    Multiscale Transport Process Laboratory Mechanical Engineering-Engineering Mechanics Michigan Technological University Houghton, Michigan 49931;

    Mechanical Engineering-Engineering Mechanics Michigan Technological University Houghton, Michigan, 49931;

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  • 正文语种 eng
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