On the current distribution at the channel - rib scale in polymer-electrolyte fuel cells
On the current distribution at the channel - rib scale in polymer-electrolyte fuel cells
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DOI：
10.1016/j.ijhydene.2018.01.097
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发表时间：
2018-03
影响因子：
7.2
通讯作者：
N. Belgacem;J. Pauchet;M. Prat
中科院分区：
文献类型：
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作者：
N. Belgacem;J. Pauchet;M. Prat
基于在阴极侧上的催化剂层和气体扩散层（GDL）之间的界面处以通道-肋尺度进行的原位测量的实验结果示出了随着平均电流密度的增加电流密度分布的有趣变化。据发现，肋中轴线以下的局部电流密度对应于在低到中等平均电流密度的最大值和最小值时，平均电流密度是足够高的。此外，电流密度越高，最小值越显著。从数值模拟，它表明，电流密度分布反转现象是强烈相关的液态水区内的GDL的发展。
Experimental results based on in-situ measurements at the interface between the catalyst layer and the gas diffusion layer (GDL) on the cathode side at the channel – rib scale show an interesting variation of the current density distribution as the mean current density is increased. It is found that the local current density below the rib median axis corresponds to a maximum at low to intermediate mean current densities and to a minimum when the mean current density is sufficiently high. Also, the higher is the current density, the more marked the minimum. From numerical simulations, it is shown that the current density distribution inversion phenomenon is strongly correlated to the liquid water zone development within the GDL.