Hybrid proton-conducting membranes for polymer electrolyte fuel cells: Phosphomolybdic acid doped poly(2,5-benzimidazole) - (ABPBI-H 3PMo12O40)

Pedro Gómez-Romero, Juan Antonio Asensio, Salvador Borrós

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Resum

The synthesis and characterization of a novel hybrid organic-inorganic material formed by phosphomolybdic acid H3PMo12O 40 (PMo12) and poly(2,5-benzimidazole) (ABPBI) is reported. This material, composed of two proton-conducting components, can be cast in the form of membranes from methanesulfonic acid (MSA) solutions. Upon impregnation with phosphoric acid, the hybrid membranes present higher conductivity than the best ABPBI polymer membranes impregnated in the same conditions. These electrolyte membranes are stable up to 200 °C, and have a proton conductivity of 3 × 10-2 S cm-1 at 185 °C without humidification. These properties make them very good candidates as membranes for polymer electrolyte membrane fuel cells (PEMFC) at temperatures of 100-200 °C.

Idioma originalAnglès
Pàgines (de-a)4715-4720
Nombre de pàgines6
RevistaElectrochimica Acta
Volum50
Número24
DOIs
Estat de la publicacióPublicada - 30 d’ag. 2005

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