A novel polymer electrolyte fuel cell flow-field: The through-plane array
A novel polymer electrolyte fuel cell flow-field: The through-plane array
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DOI：
10.1016/j.jpowsour.2019.227218
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发表时间：
2019-12
影响因子：
9.2
通讯作者：
M. Whiteley;J. Cho;L. Rasha;T. Neville;J. Millichamp;Robert Luca;P. Shearing;D. Brett
中科院分区：
文献类型：
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作者：
M. Whiteley;J. Cho;L. Rasha;T. Neville;J. Millichamp;Robert Luca;P. Shearing;D. Brett
流场板是聚合物电解质燃料电池（PEFC）的重要组成部分，最常见的类型包括平行或蛇形通道。提出了一种新型的流场，“贯穿平面阵列”（TPA），它提供了显着改善的性能，在较高的电流密度与较低的背压的优势。该概念修改了传统的流场工作在死端模式，并结合了一个阵列的孔（<10 μm直径）。在允许气体排出的陆地区域。在这种情况下，阴极是焦点，因为该电极遭受最大的反应物进入和水淹没挑战。通过迫使气体进入气体扩散层（GDL）以便离开，反应物暴露于平台下方的区域，并且产物水的去除得到增强。
Flow-field plates are essential components for polymer electrolyte fuel cells (PEFCs), the most common types incorporating parallel or serpentine channels. A novel flow-field, the ‘through-plane array’ (TPA), is presented which provides significantly improved performance at higher current density with the advantage of lower backpressure. The concept modifies a conventional flow-field operating in dead-ended mode and incorporates an array of holes (<10 μm dia.) in the land areas that allows gas exit. In this case, the cathode is the focus, as this electrode suffers from the greatest reactant access and water flooding challenges. By forcing gas to enter the gas diffusion layer (GDL) in order to exit, the reactant is exposed to areas under the land and removal of product water is enhanced.