Water Transport in Gas Diffusion Layer of PEFC with Wettability Distribution in Thickness Direction
Water Transport in Gas Diffusion Layer of PEFC with Wettability Distribution in Thickness Direction
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PEFC气体扩散层中的水传输及厚度方向润湿性分布
DOI：
10.1149/09208.0205ecst
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Tabe Yutaka
中科院分区：
文献类型：
--
作者：
Sakaida Satoshi;Tanaka Kotaro;Konno Mitsuru;Tabe Yutaka
为改善聚合物电解质燃料电池（PEFC）气体扩散层（GDL）的水传输性能，采用格子Boltzmann方法（LBM）研究了GDL厚度方向润湿性分布对水传输性能的影响.由于肋下导水管内普遍存在大量的积水，因此肋下导水管内的水行为成为研究的重点。结果表明，弱疏水性和强疏水性在厚度方向上形成的润湿性分布使GDL中的水显著减少，这是因为GDL下部的水被拉向GDL上部，而GDL上部的水则沿沿着弱疏水区被输送到通道中。弱疏水区距离GDL表面约4个孔的深度有利于减少GDL中的水。
To improve the water transport of a gas diffusion layers (GDL) in a polymer electrolyte fuel cell (PEFC), the effect on the wettability distribution in the thickness direction of the GDL was investigated by a lattice Boltzmann method (LBM). Because much water is generally accumulated in the GDL under rib, the water behavior in the GDL under rib was the focus. The result showed the water in the GDL was significantly reduced by the wettability distribution in the thickness direction made by weak and strong hydrophobicity because the water in the lower of GDL was pulled up to the upper of GDL and the water in the upper of GDL was transported into the channel along the weak hydrophobic region. The depth of the weak hydrophobic region from the GDL surface equivalent to about four pores was advantageous to reduce the water in the GDL.