The future trend in proton exchange membrane fuel cells (PEMFCs) is delveloping towards higher operating temperatures, although the current lack of comprehensive investigation into the PEMFC characteristics at elevated temperatures. This work provides a comprehensive summary of commonly used test methods and data processing methods for PEMFCs, encompassing polarization decomposition, electrochemical impedance spectroscopy (EIS) processing methods, electrochemical surface area (ECSA) and hydrogen crossover current density () calculation methods. Experiments on PEMFC performance and membrane electrode assembly (MEA) parameters at 80 to 95 °C under various humidities are conducted. The experimental results indicate that elevated temperatures contribute to increased ohmic loss and reduced mass transfer and activation losses. Increased temperature can substantially accelerate the reaction rate and compensate for the decrease in ECSA. The ECSA decreases at elevated temperatures, and higher temperatures will result in a faster drop. The demonstrates an increase with both temperatures and humidities, with higher humidities leading to faster growth. Based on the comprehensive test and analysis methods for PEMFC, this study could enhance understanding and provide valuable guidance for PEMFC performance variation laws at high operating temperatures.

中文翻译：

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质子交换膜燃料电池高工作温度性能及膜电极组件参数的实验研究与综合分析


尽管目前缺乏对 PEMFC 在高温下特性的全面研究，但质子交换膜燃料电池 (PEMFC) 的未来趋势正在向更高的工作温度发展。本文全面总结了质子交换膜燃料电池常用的测试方法和数据处理方法，包括极化分解、电化学阻抗谱（EIS）处理方法、电化学表面积（ECSA）和氢交叉电流密度（）计算方法。在 80 至 95 °C 和不同湿度下进行 PEMFC 性能和膜电极组件 (MEA) 参数的实验。实验结果表明，升高的温度有助于增加欧姆损耗并减少传质和活化损失。升高温度可以显着加快反应速率并补偿 ECSA 的降低。 ECSA 在温度升高时下降，温度越高，下降速度越快。结果表明，温度和湿度都会增加，湿度越高，生长越快。基于PEMFC的综合测试和分析方法，本研究可以加深对PEMFC在高工作温度下性能变化规律的理解并提供有价值的指导。