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Title

Polymer Electrolyte Fuel Cells Based on Phosphoric Acid-Impregnated Poly(2,5-benzimidazole) Membranes

AuthorsAsensio, Juan Antonio; Borrós, Salvador; Gómez-Romero, P. CSIC ORCID
KeywordsABPBI
Membranes
Polymer electrolyte membrane
Issue Date4-May-2004
PublisherElectrochemical Society
CitationJournal of The Electrochemical Society 151(2): A304-A310 (2004)
AbstractPreparation and characterization of membranes of poly(2,5-benzimidazole) (ABPBI) (as thin as 20 Mm) for polymer electrolyte membrane fuel cells are reported. These membranes were prepared by solution casting and then impregnated in phosphoric acid baths. Their characterization included thermogravimetric analyses, conductivity measurements, Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. These membranes have high thermal stability and good proton conductivity at temperatures up to 200°C (6.2 3 1022 S cm21 at 150°C and 30% relative humidity!, similar to the well-known commercial polybenzimidazole (PBI). ABPBI membrane-electrode assemblies (MEAs) using commercially available E-TEK Pt/C electrodes were tested in H2 /O2 cells, obtaining power densities similar to those of PBI MEAs studied here as reference at temperatures of up to 180°C, humidifying the reactants at room temperature
Publisher version (URL)http://dx.doi.org/10.1149/1.1640628
URIhttp://hdl.handle.net/10261/15018
DOI10.1149/1.1640628
ISSN0013-4651
Appears in Collections:(ICMAB) Artículos

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