We report modeling and experimental study of impedance of the PEM fuel cell cathode with nonuniform ionomer loading. A physics–based model for the high–frequency impedance is developed and analytical solution for impedance is derived. Assuming that the CCL proton conductivity σp exponentially decays from the membrane surface, we fit the model to experimental spectra of the cell measured at the open circuit conditions. Fitting gives the characteristic scale of the σp decay, the average CCL proton conductivity and the double layer capacitance. © The Author(s) 2017. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0041711jes] All rights reserved.

中文翻译：

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非均匀Nafion负载的PEM燃料电池阴极的阻抗谱研究

我们报告了具有非均匀离聚物负载的 PEM 燃料电池阴极阻抗的建模和实验研究。开发了基于物理的高频阻抗模型，并导出了阻抗的解析解。假设 CCL 质子电导率 σp 从膜表面呈指数衰减，我们将模型拟合到在开路条件下测量的电池的实验光谱。拟合给出了 σp 衰减的特征尺度、平均 CCL 质子电导率和双层电容。© The Author(s) 2017. 由 ECS 出版。这是一篇根据知识共享署名 4.0 许可（CC BY，http://creativecommons.org/licenses/by/4.0/）条款分发的开放获取文章，它允许在任何媒体中不受限制地重复使用作品，前提是原始作品被正确引用。[DOI：