Visualization of Membrane Hydration Path in an Operating PEMFC by Nuclei-Labeling MRI
Visualization of Membrane Hydration Path in an Operating PEMFC by Nuclei-Labeling MRI
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DOI：
10.1149/1.2780958
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发表时间：
2007-09
期刊：
影响因子：
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通讯作者：
Toshikazu Kotaka;S. Tsushima;S. Hirai
中科院分区：
文献类型：
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作者：
Toshikazu Kotaka;S. Tsushima;S. Hirai
采用核标记磁共振成像（NL-MRI）技术分别研究了聚合物电解质膜燃料电池（PEMFC）运行过程中水蒸气和生成水对聚合物电解质膜（PEM）水化的影响。成功地表明，在运行的质子交换膜燃料电池中可以区分膜水合路径（即阳极加湿、阴极加湿或生成水），并且通过将分离分析结果的总和与普通燃料电池运行下的常规MRI结果进行比较，证实了该方法的有效性和实用性。从可视化结果发现，来自阳极和阴极的水蒸气对膜水合影响很小。这表明大部分膜水合来自电化学反应产生的水。
A nuclei-labeling magnetic resonance imaging (NL-MRI) technique was used to investigate the effect of water vapor and generated water on hydration of polymer electrolyte membrane (PEM) separately in polymer electrolyte membrane fuel cell (PEMFC) during operation. It was successfully shown that the membrane hydration path (ie anode humidification, cathode humidification or generated water) could be distinguished in an operating PEMFC and the validity and utility of this approach is confirmed by comparing the summation of separation analysis results with conventional MRI result under ordinary fuel cell operation. From visualization results, it was found that water vapor from the anode and the cathode has little effect on the membrane hydration. This indicates that most membrane hydration came from water generated by the electrochemical reaction.