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首页> 外文期刊>RSC Advances >Nafion (R)/SiO2/m-BOT composite membranes for improved direct methanol fuel cell performance
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Nafion (R)/SiO2/m-BOT composite membranes for improved direct methanol fuel cell performance

机译：Nafion（R）/ SiO2 / m-BOT复合膜可改善直接甲醇燃料电池的性能

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摘要

Bentonite (BOT) has excellent hygroscopicity and large specific surface, so it is chosen as a dopant of Nafion (R) membranes in this paper. By using the sol-gel method, bentonite has been modified by dodecylamine and fixed to the Nafion 212 membrane to prepare a Nafion/SiO2/m-BOT composite membrane. The results of SEM and FT-IR shows that m-BOT is successfully synthesized and bound well with the Nafion 212 membrane. The limiting current density of cathode methanol oxidation indicates that the methanol permeability of the composite membrane is 20.40% lower than that of the Nafion 212 membrane. Although the conductivity of the composite membrane (6.67 x 10(-2) S cm(-1)) declines slightly compared with that of Nafion 212 (9.91 x 10(-2) S cm(-1)), the performance of the cell using the composite membrane (135.17 mW cm(-2)) is better than the Nafion 212 membrane (118.7 mW cm(-2)) at 55 degrees C. Besides, as the anode methanol concentration increases, higher performance is obtained, which indicates that the composite membrane is more suitable for cells running with a high concentration of methanol.
机译：膨润土（BOT）具有优异的吸湿性和较大的比表面积，因此在本文中被选作Nafion（R）膜的掺杂剂。通过使用溶胶-凝胶法，膨润土已经用十二烷基胺改性，并固定在Nafion 212膜上以制备Nafion / SiO2 / m-BOT复合膜。 SEM和FT-IR结果表明，成功合成了m-BOT并与Nafion 212膜很好地结合。阴极甲醇氧化的极限电流密度表明，复合膜的甲醇渗透率比Nafion 212膜低20.40％。尽管复合膜的电导率（6.67 x 10（-2）S cm（-1））与Nafion 212（9.91 x 10（-2）S cm（-1））相比略有下降。在55摄氏度时，使用复合膜（135.17 mW cm（-2））的电池比Nafion 212膜（118.7 mW cm（-2））更好。此外，随着阳极甲醇浓度的增加，可以获得更高的性能，表明复合膜更适合于高浓度甲醇运行的细胞。

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