Effect of Hydrophilic Treatment of Cathode Channel on Liquid Water Transport through Gas Diffusion Layer and Performance of PEFC
Effect of Hydrophilic Treatment of Cathode Channel on Liquid Water Transport through Gas Diffusion Layer and Performance of PEFC
复制标题
阴极通道亲水处理对气体扩散层液态水传输及PEFC性能的影响
DOI：
10.1149/06917.1121ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
R. Giga
中科院分区：
文献类型：
--
作者：
K. Nishida;Y. Kono;T. Nakamura;R. Giga
聚合物电解质燃料电池（pefc）的水淹和阴极堵塞导致其性能严重下降。本研究的目的是利用横断面可视化技术研究阴极通道的亲水性对运行中的PEFC气体扩散层（GDL）中液态水输运的影响。此外，通过监测电池电压和阴极通道内的压差，讨论了水行为与电池性能之间的关系。研究发现，阴极通道的亲水性处理可以有效地促进液态水从GDL中吸出，减轻催化剂层附近的水驱。此外，亲水性不会经常造成气通道内的水堵塞。
Water flooding and plugging in cathode of polymer electrolyte fuel cells (PEFCs) lead to severe performance degradation. The aim of this study was to investigate the effect of hydrophilization of cathode channel on the liquid water transport through the gas diffusion layer (GDL) in an operating PEFC using cross-sectional visualization technique. Furthermore, the correlation between the water behavior and the cell performance was also discussed by monitoring the cell voltage and differential pressure in the cathode channel. It was noted that hydrophilic treatment of cathode channel effectively encourages liquid water suction from GDL and alleviates water flooding near catalyst layer (CL). Moreover, hydrophilization doesn’t frequently cause water plugging inside gas channel.