Abstract We derive a simple compact expression for impedance of the cathode side of a PEM fuel cell working at a low current density. The solution includes the faradaic impedance, the impedances due to proton and oxygen transport in the cathode catalyst layer (CCL), and due to oxygen transport in the gas diffusion layer (GDL). The solution works if the cell current density is below 100 mA cm−2. Fitting the model impedance to the experimental spectrum gives the ORR Tafel slope, the double layer capacitance, and the transport parameters of the CCL and GDL.

中文翻译：

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PEM 燃料电池阴极侧的分析低电流阻抗

摘要 我们推导出了 PEM 燃料电池在低电流密度下工作的阴极侧阻抗的简单紧凑表达式。该解决方案包括法拉第阻抗、由于阴极催化剂层 (CCL) 中的质子和氧气传输以及气体扩散层 (GDL) 中的氧气传输引起的阻抗。如果电池电流密度低于 100 mA cm−2，则该解决方案有效。将模型阻抗拟合到实验光谱给出 ORR Tafel 斜率、双层电容以及 CCL 和 GDL 的传输参数。