کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1290455 | 1498037 | 2008 | 5 صفحه PDF | دانلود رایگان |
N,N′-Bis-(1H-benzimidazol-2-yl)-isophthalamide (BBImIP) has been synthesized using phosphorus pentoxide-methanesulfonic acid (PPMA) as a solvent and dehydrating agent and investigated as an additive in both sulfonated polysulfone (SPSf) membranes (up to 4.0 wt.% BBImIP) and sulfonated poly(ether ether ketone) membranes (up to 3.0 wt.% BBImIP). The SPSf/BBImIP blend membranes have been characterized by ion-exchange capacity and proton conductivity measurements as well as single cell and methanol crossover measurements in direct methanol fuel cells (DMFCs). Although the presence of BBImIP in the SPSf/BBImIP blend membranes lowers proton conductivity and cell performance compared to that of plain SPSf, it reduces methanol crossover significantly. On the other hand, the sulfonated poly(ether ether ketone) (SPEEK)/BBImIP blend membranes show cell performance comparable to or better than that of plain SPEEK membrane with reduced methanol crossover.
Journal: Journal of Power Sources - Volume 180, Issue 2, 1 June 2008, Pages 719–723