Author(s): Pant, LM; Yang, Z; Perry, ML; Weber, AZ | Abstract: © The Author(s) 2018. A simple and fast diagnostic tool has been developed for analyzing polymer-electrolyte fuel-cell degradation. The tool is based on analyzing changes in polarization curves of a cell over its lifetime. The shape of the polarization-change curve and its sensitivity to oxygen concentration are found to be unique for each degradation pathway based on analysis from a detailed 2-D numerical model of the cell. Using the polarization-change curve methodology, the primary mechanism for degradation (kinetic, ohmic, and/or transport related) can be identified. The technique is applied to two sets of data to explain performance changes after two different cells undergo voltage-cycling accelerated stress test, where it is found that changes are kinetic and then ohmic or transport in nature depending on the cell type. The diagnostic tool provides a simple method for rapid determination of primary degradation mechanisms. Areas for more detailed future investigations are also summarized.

中文翻译：

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聚合物电解质燃料电池简单快速诊断方法的开发

作者（S）：裤子，LM；杨，Z; 佩里，ML；亚利桑那州韦伯 | 摘要：© The Author(s) 2018。已开发出一种简单快速的诊断工具，用于分析聚合物电解质燃料电池的降解。该工具基于分析电池在其整个生命周期内极化曲线的变化。根据对电池的详细二维数值模型的分析，发现极化变化曲线的形状及其对氧浓度的敏感性对于每个降解途径都是独一无二的。使用极化变化曲线方法，可以确定降解的​​主要机制（动力学、欧姆和/或传输相关）。该技术应用于两组数据，以解释两种不同电池经过电压循环加速应力测试后的性能变化，发现变化是动力学的，然后是欧姆的或本质上的传输，这取决于细胞类型。该诊断工具为快速确定主要降解机制提供了一种简单的方法。还总结了未来更详细调查的领域。