Abstract
Polybenzimidazole (PBI) with a high molecular weight of 69,000 was first synthesized. It was afterwards grafted with benzimidazole pendant groups on the backbones. The acid doped benzimidaozle grafted PBI membranes were investigated and characterized including fuel cell tests at elevated temperatures without humidification. At an acid doping level of 13.1 mol H3PO4 per average molar repeat unit, the PBI membranes with a benzimidazole grafting degree of 10.6% demonstrated a conductivity of 0.15 S cm-1 and a H2-air fuel cell peak power density of 378 mW cm-2 at 180 oC at ambient pressure without humidification.
Original language | English |
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Journal | Advanced Materials Research |
Volume | 716 |
Pages (from-to) | 310-313 |
ISSN | 1022-6680 |
DOIs | |
Publication status | Published - 2013 |
Event | 2nd International Conference on Materials Science and Technology (ICMST 2013) - Hong Kong, Hong Kong Duration: 11 Apr 2013 → 12 Apr 2013 Conference number: 2 |
Conference
Conference | 2nd International Conference on Materials Science and Technology (ICMST 2013) |
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Number | 2 |
Country/Territory | Hong Kong |
City | Hong Kong |
Period | 11/04/2013 → 12/04/2013 |
Keywords
- Grafted polybenzimidazole
- Proton exchange membrane
- High temperature
- Fuel cell