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首页> 外文期刊>International journal of hydrogen energy >Effect of ionomer content and relative humidity on polymer electrolyte membrane fuel cell (PEMFC) performance of membrane-electrode assemblies (MEAs) prepared by decal transfer method
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Effect of ionomer content and relative humidity on polymer electrolyte membrane fuel cell (PEMFC) performance of membrane-electrode assemblies (MEAs) prepared by decal transfer method

机译：离聚物含量和相对湿度对贴花转移法制备的膜电极组件（MEA）的聚合物电解质膜燃料电池（PEMFC）性能的影响

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摘要

Membrane-electrode assemblies (MEAs) were fabricated by the decal transfer method with various Nafion ionomer contents (10-40 wt%) and their single cell performance and electrochemical characteristics were examined in atmospheric air at relative humidities of 25-95%. At high humidity (95%), the MEA performance was the highest with a cathode ionomer content of 30 and 20 wt% at 0.6 and 0.4 V, respectively. The optimum ionomer content of the decal MEAs increased with decreasing humidity, because of the change in the oxygen transport rate (water flooding) and number of active sites (ionic resistance). The concentration overpotential gradually increased with relative humidity up to about 0.4 V at 0.8 A/cm~2, which was not considered in previous studies using pressurized air and oxygen. The combined effect of the electrochemical active surface area and ionic resistance of the cathodes on the activation overpotential was also investigated, focusing on intermediate and low humidity levels, using a newly developed impedance analysis method.
机译：通过贴花转移法以不同的Nafion离聚物含量（10-40 wt％）制备膜电极组件（MEAs），并在大气中相对湿度为25-95％的条件下检查其单电池性能和电化学特性。在高湿度（95％）下，MEA性能最高，分别在0.6和0.4 V下的阴极离聚物含量为30和20 wt％。贴花MEA的最佳离聚物含量随湿度的降低而增加，这是因为氧气传输速率（注水）和活性位点数量（离子电阻）的变化。在0.8 A / cm〜2的相对湿度下，浓度过电势随着相对湿度升高至约0.4 V而逐渐增加，这在以前的使用压缩空气和氧气的研究中并未考虑。还使用一种新开发的阻抗分析方法，研究了电化学活性表面积和阴极离子电阻对活化超电势的综合影响，着眼于中等和低湿度水平。

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  • 来源
    《International journal of hydrogen energy》 |2010年第18期|p.9678-9686|共9页
  • 作者

    Sunyeol Jeon; Jisun Lee; Gema M. Rios; Hyoung-Juhn Kim; Sang-Yeop Lee; EunAe Cho; Tae-Hoon him; Jong Hyun Jang;

  • 作者单位

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

    Fuel Cell Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea;

  • 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

    decal transfer method; nafion ionomer; relative humidity; ionic resistance; polymer electrolyte membrane fuel; cells (PEMFCS); membrane-electrode assembly (MEA);

    机译：贴花转印法;Nafion离聚物;相对湿度;离子电阻;聚合物电解质膜燃料;细胞（PEMFCS）;膜电极组件（MEA）;

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