TY - GEN
T1 - Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications
AU - Jang, W.
AU - Choi, S.
AU - Lee, S.
AU - Park, S.
AU - Seo, J.
AU - Shul, Y.
AU - Han, H.
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2007
Y1 - 2007
N2 - A benzimidazole pendant diamine, 5-(1H-benzoimidazol-2-yl)-benzene-1-3- diamine, was synthesized from 2-(3,5-dinitrophenyl)-1H-benzoimidazole. Here the dinitro compound was prepared from 3,5-dinitrobenzoyl chloride and 1,2-phenylene diamine. The benzimidazole pendant diamine was used to synthesis polyimide with pendant benzimidazole groups. These pendant benzimidazole groups present in polyimide main chain were used to dope phosphoric acid and phosphomolibdic acid thereby proton conducting polyelectrolyte membranes were prepared from them. The effect of changing concentration of phosphoric acid and phosphomolibdic acid on the properties of the membranes was studied. It was found that doping of phosphoric acid increased the conductivity at 30% R. H. and further addition of phosphomolibdic acid further increased the conductivity, which can be a promising applicable candidate for the high temperature operation and low humidity required fuel cell.
AB - A benzimidazole pendant diamine, 5-(1H-benzoimidazol-2-yl)-benzene-1-3- diamine, was synthesized from 2-(3,5-dinitrophenyl)-1H-benzoimidazole. Here the dinitro compound was prepared from 3,5-dinitrobenzoyl chloride and 1,2-phenylene diamine. The benzimidazole pendant diamine was used to synthesis polyimide with pendant benzimidazole groups. These pendant benzimidazole groups present in polyimide main chain were used to dope phosphoric acid and phosphomolibdic acid thereby proton conducting polyelectrolyte membranes were prepared from them. The effect of changing concentration of phosphoric acid and phosphomolibdic acid on the properties of the membranes was studied. It was found that doping of phosphoric acid increased the conductivity at 30% R. H. and further addition of phosphomolibdic acid further increased the conductivity, which can be a promising applicable candidate for the high temperature operation and low humidity required fuel cell.
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U2 - 10.1149/1.2728984
DO - 10.1149/1.2728984
M3 - Conference contribution
AN - SCOPUS:45149133724
SN - 9781566775496
T3 - ECS Transactions
SP - 17
EP - 26
BT - ECS Transactions - 30th Fuel Cell Seminar
T2 - 30th Fuel Cell Seminar
Y2 - 13 November 2006 through 17 November 2006
ER -