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首页> 外文期刊>Journal of spectroscopy >Use of Electrochemical Impedance Spectroscopy for the Evaluation of Performance of PEM Fuel Cells Based on Carbon Cloth Gas Diffusion Electrodes
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Use of Electrochemical Impedance Spectroscopy for the Evaluation of Performance of PEM Fuel Cells Based on Carbon Cloth Gas Diffusion Electrodes

机译：基于碳布气体扩散电极的电化学阻抗谱在PEM燃料电池性能评估中的应用

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摘要

Polymer electrolyte membrane fuel cells (PEMFCs) have attracted great attention in the last two decades as valuable alternative energy generators because of their high efficiencies and low or null pollutant emissions. In the present work, two gas diffusion electrodes (GDEs) for PEMFCs were prepared by using an ink containing carbon-supported platinum in the catalytic phase which was sprayed onto a carbon cloth substrate. Two aerograph nozzles, with different sizes, were used. The prepared GDEs were assembled into a fuel cell lab prototype with commercial electrolyte and bipolar plates and tested alternately as anode and cathode. Polarization measurements and electrochemical impedance spectroscopy (EIS) were performed on the running hydrogen-fed PEMFC from open circuit voltage to high current density. Experimental impedance spectra were fitted with an equivalent circuit model by using ZView software which allowed to get crucial parameters for the evaluation of fuel cell performance, such as ohmic resistance, charge transfer, and mass transfer resistance, whose trends have been studied as a function of the applied current density.
机译：在过去的二十年中，高分子电解质膜燃料电池（PEMFC）由于其高效能和低或零污染排放而作为有价值的替代能源引起了极大的关注。在本工作中，通过使用包含催化相中载有碳载铂的油墨制备了两个PEMFC的气体扩散电极（GDE），该油墨喷到了碳布基材上。使用了两个不同尺寸的航空喷嘴。制备的GDE被组装到带有商业电解质和双极板的燃料电池实验室原型中，并交替测试作为阳极和阴极。从开路电压到高电流密度，对运行中的氢馈电PEMFC进行了极化测量和电化学阻抗谱（EIS）。通过使用ZView软件，将实验阻抗谱与等效电路模型拟合，该模型允许获得评估燃料电池性能的关键参数，例如欧姆电阻，电荷转移和质量转移电阻，其趋势已根据以下特性进行了研究：施加的电流密度。

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