TY - JOUR
T1 - Polymer Electrolyte Fuel Cells Based on Phosphoric Acid-Impregnated Poly(2,5-benzimidazole) Membranes
AU - Asensio, Juan Antonio
AU - Borrós, Salvador
AU - Gómez-Romero, Pedro
PY - 2004/2
Y1 - 2004/2
N2 - Preparation and characterization of membranes of poly(2,5-benzimidazole) (ABPBI) (as thin as 20 μm) 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 × 10-2 S cm-1 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/O 2 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.
AB - Preparation and characterization of membranes of poly(2,5-benzimidazole) (ABPBI) (as thin as 20 μm) 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 × 10-2 S cm-1 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/O 2 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.
KW - Doped polybenzimidazole
KW - Proton conductivity
KW - Oxidation
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UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=pure_univeritat_ramon_llull&SrcAuth=WosAPI&KeyUT=WOS:000188182100017&DestLinkType=FullRecord&DestApp=WOS_CPL
U2 - 10.1149/1.1640628
DO - 10.1149/1.1640628
M3 - Article
AN - SCOPUS:1242332509
SN - 0013-4651
VL - 151
SP - A304-A310
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 2
ER -
