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首页> 外文期刊>Journal of power sources >Effect of the cathode open ratios on the water management of a passive vapor-feed direct methanol fuel cell fed with neat methanol
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Effect of the cathode open ratios on the water management of a passive vapor-feed direct methanol fuel cell fed with neat methanol

机译：阴极开口率对采用纯甲醇的被动式蒸气进料直接甲醇燃料电池水管理的影响

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摘要

A novel approach has been proposed to improve the water management of a passive direct methanol fuel cell (DMFC) fed with neat methanol without increasing its volume or weight. By adopting perforated covers with different open ratios at the cathode, the water management has been significantly improved in a DMFC fed with neat methanol. An optimized cathode open ratio could ensure both the sufficient supply of oxygen and low water loss. While changing the open ratio of anode vaporizer can adjust the methanol crossover rate in a DMFC. Furthermore, the gas mixing layer, added between the anode vaporizer and the anode current collector to increase the mass transfer resistance, can improve the cell performance, decrease the methanol crossover, and increase the fuel efficiency. For the case of a DMFC fed with neat methanol, an anode vaporizer with the open ratio of 12% and a cathode open ratio of 20% produced the highest peak power density, 22.7 mWcm2, and high fuel efficiency, 70.1%, at room temperature of 25 ± 1 °C and ambient humidity of 25-50%.
机译：已经提出了一种新颖的方法来改善用纯甲醇进料的被动式直接甲醇燃料电池（DMFC）的水管理，而不会增加其体积或重量。通过在阴极采用开孔率不同的多孔盖，在加有纯甲醇的DMFC中，水的管理得到了显着改善。优化的阴极开口率可以确保足够的氧气供应和低的水分流失。改变阳极气化器的开度时，可以调节DMFC中的甲醇转化率。此外，在阳极蒸发器和阳极集电器之间添加气体混合层以增加传质阻力，可以改善电池性能，减少甲醇穿越并提高燃料效率。对于DMFC进料纯甲醇的情况，在室温下，阳极蒸发器的空燃比为12％，阴极空燃比为20％时，峰值功率密度最高，为22.7 mWcm2，燃油效率最高，为70.1％。 25±1°C的温度和25-50％的环境湿度。

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  • 来源
    《Journal of power sources》 |2011年第15期|p.6318-6324|共7页
  • 作者

    Xianglin Li; Amir Faghri;

  • 作者单位

    Department of Mechanical Engineering. University of Connecticut. 191 Auditorium Road. Unit 3139. Storrs. CT06269. USA;

    Department of Mechanical Engineering. University of Connecticut. 191 Auditorium Road. Unit 3139. Storrs. CT06269. USA;

  • 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

    dmfc; methanol crossover; water management; neat methanol; efficiency; perforated cover;

    机译：dmfc;甲醇交换水管理;纯甲醇效率;穿孔盖;

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