Effects of structural aspects on the performance of a passive air-breathing direct methanol fuel cell
Effects of structural aspects on the performance of a passive air-breathing direct methanol fuel cell
复制标题
结构方面对被动吸气式直接甲醇燃料电池性能的影响
DOI：
10.1016/j.jpowsour.2010.03.069
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发表时间：
2010-09
影响因子：
9.2
通讯作者：
Zhenping Wan
中科院分区：
文献类型：
--
作者：
Yong Tang;Wei Yuan;Minqiang Pan;Biao Tang;Zongtao Li;Zhenping Wan
本研究系统地研究了结构对被动吸气式直接甲醇燃料电池（DMFC）性能的影响。本研究选取三个因素：(1)两种不同开路比的集流器；(2)两种不同的扩散层组装方法；(3)三种不同厚度的膜型。考虑到这些因素之间的相互关系和相互作用。结果表明，这些结构因素共同显著影响dmfc的细胞性能。较高的开度比不仅提供了更大的传质通道面积，有利于产物的去除，而且还促进了较高的甲醇交叉。热压扩散层（DL）可以减缓甲醇的渗透，而非键合扩散层可以增强产物的去除。膜厚度的增加有助于获得较低的甲醇交叉率和较高的甲醇利用效率，但在一定条件下也会降低电池性能。在本研究中，通过选择开比较低的集流器、非键合DL和Nafion 117膜，获得了10.7mWcm−2的最大功率密度。探讨了甲醇浓度对dmfc性能的影响。
This study systematically investigates the effects of structural aspects on the performance of a passive air-breathing direct methanol fuel cell (DMFC). Three factors are selected in this study: (1) two different open ratios of the current collector; (2) two different assembly methods of the diffusion layer; and (3) three membrane types with different thicknesses. The interrelations and interactions among these factors have been taken into account. The results demonstrate that these structural factors combine to significantly affect the cell performance of DMFCs. The higher open ratio not only provides a larger area for mass transfer passage and facilitates removal of the products, but also promotes higher methanol crossover. The hot-pressed diffusion layer (DL) can mitigate methanol permeation while the non-bonded variant is able to enhance product removal. The increase of membrane thickness helps obtain a lower methanol crossover rate and higher methanol utilisation efficiency, but also depresses cell performance under certain conditions. In this research, the maximum power density of 10.7mWcm−2is obtained by selecting the current collector with a lower open ratio, the non-bonded DL, and the Nafion 117 membrane. The effect of methanol concentration on the performance of DMFCs is also explored.
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影响因子：
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通讯作者：
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影响因子：
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