Resum
In an effort to develop improved Proton Exchange Membranes for Polymeric Fuel cells two different forms of polyanion inclusion in poly(2,5-benzimidazole) (ABPBI) have been carried out. Namely by (i) sulfonation of pre-formed polymer membranes and (ii) by addition of inorganic phosphomolybdic acid to form hybrid ABPBI-PMo12 membranes. In both cases we have detected an increased proton conductivity of the resulting membranes, associated to an enhanced capacity of the polyanion-modified materials to uptake phosphoric acid (in comparison with previously known ABPBI or even commercial PBI membranes). These new membranes are stable up to 200 °C and feature high conductivities at these temperatures, which makes them promising candidates for higher-temperature PEM Fuel Cells.
Idioma original | Anglès |
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Pàgines (de-a) | 967-972 |
Nombre de pàgines | 6 |
Revista | Electrochemistry Communications |
Volum | 5 |
Número | 11 |
DOIs | |
Estat de la publicació | Publicada - de nov. 2003 |