Polybenzimidazole Membranes Containing Benzimidazole Side Groups for High Temprature Polymer Electrolyte Membrane Fuel Cells

Jingshuai Yang, Xueyuan Li, Yizin Xu, Quantong Che, Ronghuan He, Qingfeng Li

Research output: Contribution to journalConference articleResearchpeer-review


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 languageEnglish
JournalAdvanced Materials Research
Pages (from-to)310-313
Publication statusPublished - 2013
Event2nd International Conference on Materials Science and Technology (ICMST 2013) - Hong Kong, Hong Kong
Duration: 11 Apr 201312 Apr 2013
Conference number: 2


Conference2nd International Conference on Materials Science and Technology (ICMST 2013)
CountryHong Kong
CityHong Kong


  • Grafted polybenzimidazole
  • Proton exchange membrane
  • High temperature
  • Fuel cell

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