It is widely acknowledged that the water balance issue is extremely important for improving the performance and durability of the proton exchange membrane fuel cell. In the presented paper, the visualization platform of the single fuel cell and the water balance model were built to investigate the water transport mechanisms. A transparent 25 cm² single fuel cell with serpentine flow channels was adopted. Based on the experimental data, firstly, the change rate of water content in the fuel cell was calculated quantitatively and the reliability of the water balance model was rigorously validated. Then, the water state in the fuel cell as the qualitative finding was observed online to assist the research of water transport mechanisms. Finally, the effects of inlet gas temperature, inlet gas humidity, and hydrogen/air stoichiometry on the EIS, the voltage, and the water content in the fuel cell were studied quantitatively, respectively. The corresponding relationship between the performance and the water content in the fuel cell was obtained.

中文翻译：

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基于可视化平台和水平衡模型的PEMFC输水机理研究

众所周知，水平衡问题对于提高质子交换膜燃料电池的性能和耐久性极为重要。在本文中，建立了单燃料电池的可视化平台和水平衡模型，以研究水的传输机制。一个透明的 25 厘米²采用蛇形流道的单燃料电池。基于实验数据，首先定量计算了燃料电池内含水量的变化率，并严格验证了水平衡模型的可靠性。然后，在线观察燃料电池中的水状态作为定性发现，以辅助水传输机制的研究。最后，分别定量研究了进气温度、进气湿度和氢气/空气化学计量比对 EIS、电压和燃料电池中水含量的影响。得到了燃料电池性能与含水量的对应关系。