Microscopic Visualization of State and Behavior of Liquid Water in a Gas Diffusion Layer of PEFC

Microscopic Visualization of State and Behavior of Liquid Water in a Gas Diffusion Layer of PEFC
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DOI：
10.5796/electrochemistry.75.149
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发表时间：
2007-02
期刊：
Electrochemistry
影响因子：
2.5
通讯作者：
Kosuke Nishida;T. Murakami;S. Tsushima;S. Hirai
Kosuke Nishida;T. Murakami;S. Tsushima;S. Hirai
中科院分区：
工程技术4区
文献类型：
--
作者：
Kosuke Nishida;T. Murakami;S. Tsushima;S. Hirai

文献摘要

相似文献

阴极气体扩散层（GDL）中的水淹是聚合物电解质燃料电池（PEFC）的关键问题之一，因为多孔GDL中冷凝的液态水会阻碍氧气传输到活性反应位点。在这项研究中，我们使用光学诊断系统实验研究了 PEFC 阴极多孔电极中液态水的状态，并表明它受到操作参数和 GDL 厚度的影响。此外，还可以通过使用带有凹槽的 GDL 来预测运行 PEFC 的阴极 GDL 内冷凝水的微观行为。
Water flooding in a cathode gas diffusion layer (GDL) is one of the critical problems of polymer electrolyte fuel cell (PEFC) because liquid water condensed in the porous GDL blocks oxygen transport to the active reaction sites. In this study, we experimentally investigate state of liquid water in a porous electrode of PEFC cathode using an optical diagnostic system and show that it is affected by operating parameters and GDL thickness. Furthermore, microscopic behavior of condensed water inside a cathode GDL of operated PEFC is also predicted by using the GDL with a groove.