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首页> 外文会议>Proceedings of the Joint International Conference on Electric Vehicular Technology and Industrial, Mechanical, Electrical and Chemical Engineering >Effect of hydrogen temperature and current load on the performance of proton exchange membrane fuel cell under start-stop operation
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Effect of hydrogen temperature and current load on the performance of proton exchange membrane fuel cell under start-stop operation

机译：氢温度和电流负荷对启停操作下质子交换膜燃料电池性能的影响

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摘要

Proton Exchange Membrane Fuel Cell (PEMFC) is one of fuel cell type that suitable for vehicular application because it has low operation pressure and temperature, stable, relatively small, and highly mobile. The major concern of PEMFC as vehicular power is its resistance toward start-stop cycle and constant load. PEMFC on vehicular application require fuel processor to produce hydrogen as fuel source. Output temperature of hydrogen from fuel processor is about 80¿¿C, which is high enough for PEMFC. The temperature is allegedly affecting the performance of PEMFC. This research is focused on studying the effect of hydrogen feed temperature on the performance of PEMFC. Fuel cell is operated in the start-stop cycle and constant load to simulate the conditions in vehicular application. PEMFC stack has been operated with 10 start-stop cycles under constant load of 0.05 and 0.1 A/cm2 at temperatures 25, 40, 60, and 80¿¿C. The electrochemical characterizations were carried out using chronopotentiometry and potentiodynamic polarization, while post experimental physical observations were carried out by using XRD and SEM. The experimental results show that under low constant load (0.05 A/cm2), the increase of hydrogen temperature has raised stack performance when operated with start-stop cycles, but lowered the stack performance when operated without start-stop cycle. Under high constant load (0.1 A/cm2), higher hydrogen temperature increased the stack performance, either operated with or without start-stop cycle. Post experimental XRD and SEM analysis show that the decrease of PEMFC performance is caused by platinum catalyst particles growth and MEA thickness alteration.
机译：质子交换膜燃料电池（PEMFC）是一种燃料电池类型的燃料电池，适用于车辆，因为它具有较低的工作压力和温度，稳定，相对较小且移动性强。 PEMFC作为车辆动力的主要考虑因素是其对启停循环和恒定负载的抵抗力。在车辆上使用的PEMFC要求燃料处理器产生氢气作为燃料源。燃料处理器的氢气输出温度约为80°C，对于PEMFC来说足够高。据称温度正在影响PEMFC的性能。这项研究的重点是研究氢气进料温度对PEMFC性能的影响。燃料电池以启停循环和恒定负载运行，以模拟车辆应用中的状况。 PEMFC堆在25、40、60和80°C的温度下以0.05和0.1 A / cm2的恒定负载运行了10个启停循环。电化学表征使用计时电位和电位动力学极化进行，而实验后的物理观察则使用XRD和SEM进行。实验结果表明，在低恒定负载（0.05 A / cm2）下，以启停循环运行时，氢气温度的升高提高了烟囱的性能，但在无启停循环下运行时，氢的温度降低了烟囱的性能。在高恒定负载（0.1 A / cm2）下，无论有无启停循环运行，较高的氢气温度均可提高烟囱性能。实验后的XRD和SEM分析表明，PEMFC性能的下降是由铂催化剂颗粒的生长和MEA厚度的变化引起的。

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