Enhanced high-temperature polymer electrolyte membrane based on polybenzimidazole and ionic liquids

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.

کلیدواژه ها:

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