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Critical importance of humidification of the anode in miniature air-breathing polymer electrolyte membrane fuel cells

机译:在微型透气聚合物电解质膜燃料电池中阳极加湿至关重要

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摘要

Although water management at the cathode is known to be critical in miniature polymer electrolyte membrane fuel cells (mPEMFCs), this study shows that control of water transport towards the anode is a determining factor to increase air-breathing mPEMFC performances. An analytical 1D model is developed to capture the water transport and water content profile in the membrane. It shows that drying at the anode and flooding at the cathode can happen simultaneously, mainly due to dominant electro-osmotic drag at low cell temperatures. Experimental results demonstrate that injecting water at the anode, at a rate of 3 times the amount produced at the cathode, increases the cell performances at high current densities. By this method, the limiting current and maximum power densities have been raised by 100% and 30% respectively.
机译:尽管已知在阴极处进行水管理对于微型聚合物电解质膜燃料电池(mPEMFC)至关重要,但这项研究表明,控制水向阳极的传输是提高透气性mPEMFC性能的决定性因素。开发了一个分析性一维模型来捕获膜中的水传输和水含量分布。它表明,在阳极干燥和在阴极充斥可同时发生,这主要是由于在较低的电池温度下主要的电渗阻力。实验结果表明,在阳极注入水的速度是在阴极产生的水量的3倍,可以提高电池在高电流密度下的性能。通过这种方法,极限电流和最大功率密度分别提高了100%和30%。

著录项

  • 来源
    《Journal of power sources》 |2011年第15期|p.6242-6248|共7页
  • 作者

    Simon Hamel; Luc G. Frechette;

  • 作者单位

    Universite de Sherbrooke, Dept of Mechanical Engineering, 2500 Boul. Universite, Sherbmoke, Quebec J1K2R1, Canada;

    Universite de Sherbrooke, Dept of Mechanical Engineering, 2500 Boul. Universite, Sherbmoke, Quebec J1K2R1, Canada;

  • 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

    pemfc; natural convection; anode drying; water management; flooding;

    机译:pemfc;自然对流;阳极干燥;水管理;洪水;

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