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

W. Jang, S. Choi, S. Lee, S. Park, Jongchul Seo, Yong-Gun Shul, Haksoo Han

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

2 Citations (Scopus)

Abstract

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
Pages17-26
Number of pages10
Volume5
Edition1
DOIs
Publication statusPublished - 2007 Dec 1
Event30th Fuel Cell Seminar - Honolulu, HI, United States
Duration: 2006 Nov 132006 Nov 17

Other

Other30th Fuel Cell Seminar
CountryUnited States
CityHonolulu, HI
Period06/11/1306/11/17

Fingerprint

Phosphoric acid
Polyimides
Fuel cells
Electrolytes
Membranes
Acids
High temperature operations
Polyelectrolytes
Benzene
Atmospheric humidity
Protons
Doping (additives)

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Jang, W., Choi, S., Lee, S., Park, S., Seo, J., Shul, Y-G., & Han, H. (2007). Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications. In ECS Transactions - 30th Fuel Cell Seminar (1 ed., Vol. 5, pp. 17-26) https://doi.org/10.1149/1.2728984
Jang, W. ; Choi, S. ; Lee, S. ; Park, S. ; Seo, Jongchul ; Shul, Yong-Gun ; Han, Haksoo. / Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications. ECS Transactions - 30th Fuel Cell Seminar. Vol. 5 1. ed. 2007. pp. 17-26
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Jang, W, Choi, S, Lee, S, Park, S, Seo, J, Shul, Y-G & Han, H 2007, Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications. in ECS Transactions - 30th Fuel Cell Seminar. 1 edn, vol. 5, pp. 17-26, 30th Fuel Cell Seminar, Honolulu, HI, United States, 06/11/13. https://doi.org/10.1149/1.2728984

Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications. / Jang, W.; Choi, S.; Lee, S.; Park, S.; Seo, Jongchul; Shul, Yong-Gun; Han, Haksoo.

ECS Transactions - 30th Fuel Cell Seminar. Vol. 5 1. ed. 2007. p. 17-26.

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

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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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Jang W, Choi S, Lee S, Park S, Seo J, Shul Y-G et al. Acid-doped polyimide electrolyte membranes with pendant benzimidazole groups for fuel cell applications. In ECS Transactions - 30th Fuel Cell Seminar. 1 ed. Vol. 5. 2007. p. 17-26 https://doi.org/10.1149/1.2728984