Study on water transport in hydrophilic gas diffusion layers for improving the flooding performance of polymer electrolyte fuel cells
Study on water transport in hydrophilic gas diffusion layers for improving the flooding performance of polymer electrolyte fuel cells
复制标题
DOI：
10.1016/j.ijhydene.2020.11.202
复制
发表时间：
2021-02
影响因子：
7.2
通讯作者：
Satoshi Sakaida;Yutaka Tabe;Kotaro Tanaka;M. Konno
中科院分区：
文献类型：
--
作者：
Satoshi Sakaida;Yutaka Tabe;Kotaro Tanaka;M. Konno
对于氢基聚合物电解质燃料电池（PEFC），通过润湿性分布控制气体扩散层（GDL）中的水传输有助于抑制溢流问题。在这项研究中，水传输的一种新的GDL与疏水模式进行了研究。首先，我们阐明了水的运动在亲水性GDL与微结构可以再现放大的规模模型。比例模型实验还表明，在亲水性GDL中，相同的水行为可以从Ca ~ 10− 5至10−3范围内的毛细管数（Ca）获得。由于计算负荷与Ca成反比，因此通过使用Ca ~ 10−3，计算负荷可以减少1/100，这是PEFC操作（Ca~ 10−5）的100倍。最后，进行了Ca ~ 10− 3的模拟，我们发现接触角为50°的直线区域的GDL最大限度地减少了水的积累。
For hydrogen-based polymer electrolyte fuel cells (PEFCs), water transport control in gas diffusion layers (GDLs) by wettability distribution is useful to suppress the flooding problem. In this study, the water transport of a novel GDL with hydrophilic-hydrophobic patterns was investigated. First, we clarified that the water motion in the hydrophilic GDL with microstructures could be reproduced by the enlarged scale model. The scale model experiment also showed that the same water behavior in hydrophilic GDL can be obtained from Capillary numbers (Ca) in a range ofCa~ 10−5to 10−3. As the computational load is inversely proportional toCa, the computational load could be reduced by 1/100th by usingCa ~ 10−3, which is 100 times higher than PEFC operation (Ca~ 10−5). Finally, the simulation withCa~ 10−3was performed, and we showed that the GDL with straight region of contact angle 50° minimized the water accumulation.