Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells
Novel sulfonated Nafion®-based composite membranes with pillararene as selective artificial proton channels for application in direct methanol fuel cells
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DOI：
10.1016/j.ijhydene.2015.07.073
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发表时间：
2015-10
影响因子：
7.2
通讯作者：
Liangbo Shen;Zhaonan Sun;Yuhao Chu;Jing-Xia Zou;M. Deshusses
中科院分区：
文献类型：
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作者：
Liangbo Shen;Zhaonan Sun;Yuhao Chu;Jing-Xia Zou;M. Deshusses
质子交换膜（PEM）是低温燃料电池的关键部件。大多数PEM由全氟磺酸聚合物（例如Nafion®）制成。然而，Nafion具有高的甲醇渗透性，这限制了其在直接甲醇燃料电池（DMFC）中的适用性。在这里，我们报告了新型磺化柱[5]芳烃/Nafion复合膜，具有改进的性能，用于DMFC。在一系列合成和操作条件下，新型复合膜的性能进行了研究。在大多数条件下，新型复合膜表现出远远优于Nafion的性能上级。例如，磺化柱[5]芳烃的质子传导率（10重量%）/在80 °C时，Nafion复合膜的渗透率为0.145 × 10−4S cm− 1，而甲醇渗透率为2.43 × 10− 6cm 2/s。质子选择性增加到两倍相比，Nafion重铸膜。讨论了可能的改进机制。总之，这些结果表明，这些新型复合膜是有前途的DMFC中的应用。
Proton exchange membranes (PEM) are critical components of low temperature fuel cells. Most PEMs are made of perfluorinated sulfonic acid polymers such as Nafion®. However, Nafion has a high methanol permeability which is limiting its applicability in direct methanol fuel cells (DMFCs). Here, we report on novel sulfonated pillar[5]arene/Nafion composite membranes with improved properties for application in DMFCs. The properties of the novel composite membranes were investigated under a range of synthesis and operating conditions. Under most conditions, the novel composite membranes exhibited properties far superior than Nafion. For example, the proton conductivity of the sulfonated pillar[5]arene's (10 wt.%)/Nafion composite membrane was 0.145 × 10−4S cm−1at 80 °C, while methanol permeability was 2.43 × 10−6cm2/s. Proton selectivity was increased up to two-fold compared to Nafion-recast membrane. The likely mechanisms for improvements were discussed. Overall, these results indicate that these novel composite membranes are promising for application in DMFCs.