Author(s): Pant, LM; Weber, AZ | Abstract: © The Author(s) 2017. Published by ECS. All rights reserved. A new semi-analytical agglomerate model is presented for polymer-electrolyte fuel-cell cathodes. The model uses double-trap kinetics for the oxygen-reduction reaction, which can capture the observed potential-dependent coverage and Tafel-slope changes. An iterative semi-analytical approach is used to obtain reaction rate constants from the double-trap kinetics, oxygen concentration at the agglomerate surface, and overall agglomerate reaction rate. The analytical method can predict reaction rates within 2% of the numerically simulated values for a wide range of oxygen concentrations, overpotentials, and agglomerate sizes, while saving simulation time compared to a fully numerical approach.

中文翻译：

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通信——用双阱动力学模拟聚合物-电解质燃料电池团块

作者（S）：裤子，LM；亚利桑那州韦伯 | 摘要：© The Author(s) 2017。ECS 出版。版权所有。为聚合物电解质燃料电池阴极提出了一种新的半分析附聚物模型。该模型使用双阱动力学进行氧还原反应，可以捕获观察到的电位依赖性覆盖率和 Tafel 斜率变化。使用迭代半分析方法从双阱动力学、附聚物表面的氧浓度和总附聚物反应速率获得反应速率常数。对于各种氧浓度、超电势和团聚体尺寸，该分析方法可以预测反应速率在数值模拟值的 2% 以内，同时与完全数值方法相比节省了模拟时间。