| Synthesis and characterization of membrane containing sulfonated and phosphonated groups for high temperature proton exchange membrane fuel cell (PEMFC) |
| کد مقاله : 1114-CNF |
| نویسندگان |
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کورش فیروز *1، امیر عبدالملکی2، محمد رضا مولویان3، محمد ژیانی4 1دانشگاه تربیت مدرس 2دانشگاه شیراز 3دانشگاه صنعتی اصفهان 4انجمن |
| چکیده مقاله |
| Abstract Some new polybenzimidazoles (PBIs) containing different acidic groups (–SO3H and –PO3H2) as proton donors, and amphoteric groups (Imidazole and –PO3H2) as proton transmitters have been synthesized. Proton conductivity for PBI1 at the ambient temperatures in water is 0.015 S.cm-1 and for PBI2 is 0.075 S.cm-1. At 140 ºC and RH=30%, proton conductivity is 0.126 S.cm-1 for PBI2 Vs 0.003 S.cm-1 for Nafion. Moreover, the PBI2 shows high proton conductivity under anhydrous condition at 140 ºC. The PBI2 exhibit a highly porous morphology due to its sulfonated hydrophilic sidechains. Theoretical studies show that hydrogen bonding (HB) interactions of side chains and main chain groups lead to pores formation in the polymer structure. The presence of pores and hydrophilic groups in polymer structure increases water uptake and durability of water molecules at high temperatures. Formation of a great HB network between acidic and amphoteric groups helps proton transport under anhydrous conditions [1-4]. |
| کلیدواژه ها |
| Keywords: Fuel Cell; Proton Exchange Membrane; Hopping Mechanism; Quantum Theory of Atoms in Molecules; Density Functional Theory |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |