Na Li , Simon L. Sahlin , Mengfan Zhou , Vincenzo Liso , Samuel Simon Araya
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引用次数: 0
摘要
本研究主要探讨高温质子交换膜燃料电池(HT-PEMFCs)堆在不同运行模式下的性能变化。在恒定负载(0.4 A cm-2)和动态负载(0.05-0.4 A cm-2)条件下,以氢气为阳极燃料,在温度为 160 ℃ 的条件下测试了由 30 个单体电池组成的高温质子交换膜燃料电池堆。此外,还研究了杂质对烟囱的影响,方法是在恒定和动态运行条件下,向烟囱阳极输入甲醇重整酸混合物作为燃料。结果表明,在使用氢气进行恒定和动态运行 120 小时后,烟囱的性能保持稳定,而在阳极加入干重整油时,烟囱的性能大幅下降。在恒定运行时,显著的降解率为 94.4 µV h-1,而在使用重整液气体的动态运行时,降解率则高出 200 倍。
Effects of operation modes on high temperature PEM fuel cell stack degradation
This study focuses on investigating the performance change of a high temperature proton exchange membrane fuel cell (HT-PEMFCs) stack at different operation modes. A HT-PEMFC stack consisting of 30 single cells was tested both at constant load (0.4 A cm−2) and dynamic load (0.05–0.4 A cm−2) conditions at a temperature of 160 ℃ and hydrogen as anode fuel. Besides, the effect of impurities on the stack was also investigated by feeding a methanol reformate mixture to the stack anode as fuel for both constant and dynamic operation. The results reveal that the stack performance was stable after 120 h of both constant and dynamic operation with hydrogen, while the stack performance decreased greatly when the stack was fed with dry reformate on the anode. Significant degradation rates of 94.4 µV h−1 for constant operation, while the degradation was 200 times higher in dynamic operation with reformate gas.