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首页> 外文会议>International Conference on Electric Vehicular Technology >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：氢气温度和电流负荷对启动操作中质子交换膜燃料电池性能的影响

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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）是适用于车辆应用的燃料电池类型之一，因为它具有较低的操作压力和温度，稳定，相对较小，并且高移动。 PEMFC作为车辆功率的主要问题是其对起动停止周期和恒定负荷的阻力。在车辆应用上的PEMFC需要燃料处理器生产氢气作为燃料源。来自燃料处理器的氢的输出温度约为80 ?? C，其足够高，用于PEMFC。据称，温度影响PEMFC的性能。本研究专注于研究氢饲料温度对PEMFC性能的影响。燃料电池在起始停止周期和恒定负载中操作以模拟车辆应用中的条件。在温度25,40,60和80℃下，PEMFC堆叠在0.05和0.1a / cm2的恒定负载下运行10个起动停止循环。使用时间计量计量和电量极化进行电化学表征，而使用XRD和SEM进行实验后的实验性物理观察。实验结果表明，在低恒定载荷（0.05A / cm2）下，氢气温度的增加在用启动停止循环操作时升高了堆叠性能，但在没有启动停止周期的情况下操作时降低了堆叠性能。在高恒定载荷（0.1A / cm2）下，较高的氢气温度提高了堆叠性能，无论是在没有启动停止周期的情况下运行。实验后XRD和SEM分析表明，PEMFC性能的降低是由铂催化剂颗粒生长和MEA厚度改变引起的。

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