Development of Electrolyte Membranes for Fuel Cells Operating at Intermediate Temperatures (130-200°)

The objective of this work was the preparation and characterization of poly(2,5-benzimidazole) (ABPBI) as electrolyte membrane for fuel cells applications at intermediate temperatures (130-200°). The ABPBI membranes were prepared by casting and then doped in phosphoric acid baths of different concentrations. The characterization included thermogravimetric analyses, elemental analyses and size exclusion chromatography. ABPBI membrane-electrode assemblies (MEAs) were tested in H2/O2 fuel cells.