Performance Investigation of Membrane Electrode Assemblies for High Temperature Proton Exchange Membrane Fuel Cell

Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties of the prepared MEAs were evaluated and analyzed by polarization curve, electrochemistry impedance spectroscopy (EIS), cyclic voltammetry (CV) and durability test. The results showed that MEA with modified ABPBI membrane (AM) has satisfactory performance and durability for fuel cell application. Compare to conventional PBI or Nafion binders, polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as binders in the catalyst layer (CL) of gas diffusion electrode (GDE) for HT-PEMFC.

PBI及衍生物的合成及其溶解性能研究

由间苯二甲酸(IPA)和3,3′,4,4′-二氨基联苯胺(TAB)采用逐步升温溶液缩聚的方法合成了聚苯并咪唑(PBI),并通过FT-IR、1H-NMR和TGA等对其进行了表征,讨论了聚合过程中的影响因素,优化了聚合条件,同时还比较了PBI和聚(2,5-苯并咪唑)(ABPBI)在不同溶剂中的溶解性能。