Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures
Nanocomposite SPEEK-based membranes for Direct Methanol Fuel Cells at intermediate temperatures
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DOI：
10.1016/j.memsci.2015.05.055
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发表时间：
2015-10-15
影响因子：
9.5
通讯作者：
Compan, Vicente
中科院分区：
文献类型：
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作者：
Molla, Sergio;Compan, Vicente
以水为溶剂，将磺化聚醚醚酮（SPEEK）与聚乙烯醇（PVA）共混物渗透到SPEEK与聚乙烯醇缩丁醛（PVB）共混的静电纺丝纳米纤维中，制备了新型纳米复合膜。该膜的特征在于它们在中等温度（>80 ° C）下操作的直接甲醇燃料电池（DMFC）上的应用。溶剂对SPEEK-PVA体系的交联温度有重要影响。水合SPEEK-30%PVB纳米纤维垫与类似组成的致密膜相比显示出更高的质子传导率。将纳米纤维垫并入SPEEK-35%PVA基质中提供了机械稳定性、甲醇阻隔性能和高达120 ° C的交联温度的一定质子传导性。在该交联温度以上，纳米纤维的作用不明显。讨论了纳米纤维和交联温度对膜性能的综合影响。DIV 1FC性能实验得出了这种新型低成本膜的有希望的结果，尽管仍需要进一步的优化步骤。(C)2015 Elsevier B. V.版权所有。
Novel nanocomposite membranes were prepared by infiltration of a blend of sulfonated PEEK (SPEEK) with polyvinyl alcohol (PVA), using water as solvent, into electrospun nanolibers of SPEEK blended with polyvinyl butyral (PVB). The membranes were characterized for their application on Direct Methanol Fuel Cells (DMFCs) operating at moderate temperatures (>80 degrees C). An important role of the solvent on the crosslinking temperature for the SPEEK-PVA system was observed. A mat of hydrated SPEEK-30%PVB nanofibers revealed higher proton conductivity in comparison with a dense membrane of similar composition. Incorporation of the nanoliber mats to the SPEEK-35%PVA matrix provided mechanical stability, methanol barrier properties and certain proton conductivity up to a crosslinking temperature of 120 degrees C. Not remarkable effect of the nanofibers was found above that crosslinking temperature. The combined effect of the nanofibers and crosslinking temperature on the properties of the membranes is discussed. DIV1FC performance experiments concluded promising results for this new low-cost type of membranes, although further optimization steps are still required. (C) 2015 Elsevier B.V. All rights reserved.