Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications

W. Jang, S. Choi, S. Lee, S. Park, J. Seo, Y. Shul, H. Han

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


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.

Original languageEnglish
Title of host publicationECS Transactions - 30th Fuel Cell Seminar
PublisherElectrochemical Society Inc.
Number of pages10
ISBN (Electronic)9781566775496
ISBN (Print)9781566775496
Publication statusPublished - 2007
Event30th Fuel Cell Seminar - Honolulu, HI, United States
Duration: 2006 Nov 132006 Nov 17

Publication series

NameECS Transactions
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737


Other30th Fuel Cell Seminar
Country/TerritoryUnited States
CityHonolulu, HI

All Science Journal Classification (ASJC) codes

  • General Engineering


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