Improvement of the Nafion–polytetrafluoroethylene membranes for potential direct methanol fuel cell use by reduction of the methanol crossover
Improvement of the Nafion–polytetrafluoroethylene membranes for potential direct methanol fuel cell use by reduction of the methanol crossover
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DOI：
10.1002/app.28438
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发表时间：
2008-11
影响因子：
3
通讯作者：
Haolin Tang;M. Pan;W. Zhaohui
中科院分区：
文献类型：
--
作者：
Haolin Tang;M. Pan;W. Zhaohui
研究了聚四氟乙烯（ePTFE）/聚四氟乙烯（Nafion/ePTFE）复合膜用作直接甲醇燃料电池（DMFC）质子交换膜的可能性。通过在Nafion/ePTFE膜表面自组装Pd纳米粒子来降低甲醇渗透，制备了厚度约为14 μm的Nafion/ePTFE膜。组装在膜上的Pd纳米粒子的负载量为1.6-1.8 μg/cm ~ 2，对Nafion膜的高电导率影响不大。随着Pd纳米颗粒的自组装，甲醇渗透显著降低，从340至28 mA/cm 2。结果，自组装48小时的Nafion/ePTFE膜的开路电压从0.55 V更显著地增加到0.73 V。甲醇渗透的减少显著地增加了DMFC的电压-电流性能，并且这意味着自组装的Nafion/聚四氟乙烯PEM在DMFC中具有前景。© 2008 Wiley Periodicals，Inc.应用聚合物科学杂志，2008年
The possibility of ultrathin Nafion/expanded polytetrafluoroethylene (ePTFE) membranes used as proton-exchange membranes (PEMs) for direct methanol fuel cells (DMFCs) was investigated in this study. Nafion/ePTFE membranes with a thickness of ∼ 14 μm were promoted by self-assembling Pd nanoparticles on the surface to reduce the methanol crossover. The loading of the Pd nanoparticles assembled on the membranes was 1.6–1.8 μg/cm2 and had little effect on the high conductivity of the Nafion membranes. With the self-assembly of Pd nanoparticles, the methanol permeation noticeably decreased from 340 to 28 mA/cm2. As a result, the open- circuit voltage of the Nafion/ePTFE membranes that were self-assembled for 48 h had a more significant increase from 0.55 to 0.73 V. The reduction of methanol crossover significantly increased the DMFC voltage-current performance, and this means that self-assembled Nafion/polytetrafluoroethylene PEMs have promise in DMFCs. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008