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Effect of cathode GDL characteristics on mass transport in PEM fuel cells

机译：阴极GDL特性对PEM燃料电池质量传输的影响

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摘要

The effect of the content of the hydrophobic agent in the cathode gas diffusion layer (GDL) on the mass transport in the proton exchange membrane fuel cells (PEMFCs) was studied using mercury porosimetry, scanning electron microscopy, and electrochemical polarization techniques. The mercury intrusion data and SEM micrograph indicated that the hydrophobic agent alters the surface and bulk structure of the GDL, thereby controlling gas-phase void volume and liquid water transport. The electrochemical polarization curves were measured and quantitatively analyzed to determine the oxygen transport limitation both in the catalyst layer and the GDL. Evaluation of the parameter ζ, which represents the cathode GDL characteristics for liquid water transport, indicated that the optimized content of the hydrophobic agent and effective water management results from a trade-off between the hydrophobicity and the absolute permeability for faster water drainage.
机译：使用汞孔隙率法，扫描电子显微镜和电化学极化技术研究了阴极气体扩散层（GDL）中疏水剂的含量对质子交换膜燃料电池（PEMFC）中质量传输的影响。汞侵入数据和SEM显微照片表明，疏水剂改变了GDL的表面和整体结构，从而控制了气相空隙体积和液体水的输送。测量并定量分析电化学极化曲线，以确定在催化剂层和GDL中的氧传输极限。代表液体水传输的阴极GDL特性的参数ζ的评估表明，疏水剂的最佳含量和有效的水管理是疏水性和绝对渗透性之间的权衡取舍，以加快排水速度。

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  • 来源
    《Fuel》 |2009年第11期|2068-2073|共6页
  • 作者

    Sehkyu Park; Branko N. Popov;

  • 作者单位

    Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA Pacific Northwest National Laboratory, Richland, WA 99352, USA;

    Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    proton exchange membrane fuel cell; gas diffusion layer; hydrophobic agent; absolute permeability;

    机译：质子交换膜燃料电池气体扩散层;疏水剂绝对磁导率;

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