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Experimental and analytical analysis of polarization and water transport behaviors of hydrogen alkaline membrane fuel cell

机译:氢碱性膜燃料电池的极化和输水行为的实验和分析分析

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摘要

Experimental test and analytical modeling are conducted to investigate the operating behavior of an alkaline electrolyte membrane (AEM) fuel cell fed by H-2/air (or O-2) and explore the effect of various operating pressures on the water transfer mechanism. According to the experimental test, the cell performance is greatly improved through increasing the operating pressure gradient from anode to cathode which leads to significant liquid water permeation through the membrane. The high frequency resistance of the A901 alkaline membrane is observed to be relatively stable as the operating pressure varies based on the electrochemical impedance spectroscopy (EIS) method. Correspondingly, based on the modeling prediction, the averaged water content in the membrane electrode assembly (MEA) does not change too much which leads to the weak variation of membrane ohmic resistance. This reveals that the performance enhancement should give the credit to better electro-chemical reaction kinetics for both the anode and cathode, also prone by the EIS results. The reversion of water back diffusion direction across the membrane is also observed through analytical solution.
机译:进行了实验测试和分析建模,以研究由H-2 /空气(或O-2)供入的碱性电解质膜(AEM)燃料电池的运行行为,并探讨各种运行压力对水传输机制的影响。根据实验测试,通过增加从阳极到阴极的工作压力梯度可以极大地改善电池性能,从而导致大量的液态水透过膜。根据电化学阻抗谱(EIS)方法,随着工作压力的变化,观察到A901碱性膜的高频电阻相对稳定。相应地,基于建模预测,膜电极组件(MEA)中的平均水含量变化不会太大,从而导致膜欧姆电阻的微弱变化。这表明,性能增强应归功于阳极和阴极的更好的电化学反应动力学,这也容易受到EIS结果的影响。通过分析溶液也可以观察到水在整个膜上的反向扩散方向的反转。

著录项

  • 来源
    《Journal of power sources》 |2018年第1期|1-12|共12页
  • 作者单位

    Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China;

    Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China;

    Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China;

    Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China;

    Tianjin Univ, State Key Lab Engines, 135 Yaguan Rd, Tianjin 300350, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Alkaline electrolyte membrane fuel cell; Experimental test; Analytical model; Water transport;

    机译:碱性电解质膜燃料电池;试验;分析模型;输水;
  • 入库时间 2022-08-18 00:21:24

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