Khadijeh Hooshyari - Department of Chemistry, Amirkabir University of Technology, Tehran, Iran- Solar Cell and Fuel Cell Lab, Renewable Energy Research Center, Amirkabir University of Technology, Tehran, Iran
Mehran Javanbakht - Department of Chemistry, Amirkabir University of Technology, Tehran, Iran- Solar Cell and Fuel Cell Lab, Renewable Energy Research Center, Amirkabir University of Technology, Tehran, Iran
Mina Adibi - Gas Transportation and Processing Technology Development Division, Research Institute of Petroleum Industry (RIPI)

Two types of innovative composite membranes based on polybenzimidazole (PBI) containing dicationic ionic liquid 1,3-di(3-methylimidazolium) propane bis (trifluoromethylsulfonyl) imide (PDC3) and monocationic ionic liquid 1-hexyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide (PMC6) are prepared as electrolytes for high temperature fuel cells applications under anhydrous conditions. The analyses of results display promising characteristics such as high proton conductivity and thermal stability. The highest proton conductivity of 81 mS/cm is achieved for PA doped PDC3 composite membranes with PBI/IL mole ratio: 4 at 180 ºC.

Polybenzimidazole, polymer electrolyte membranes, proton conductivity, dicationic ionic liquid