Polymeric Materials Lab
Fuel CELLS
Proton exchange membrane fuel cell (PEMFC)
Principle
Benifit
-
Low noice
-
Low pollution
-
Modularing
-
High efficiency
-
Multi-fuel
High Temperature Proton Exchange Fuel Cells (HT-PEMFCs)
High temperature proton exchange membrane fuel cells (HTPEMFCs) based on phosphoric acid-doped polybenzimidazole (PBI) have received wide attention over the past decade. As opposed to perfluorosulphonic acid polymers (e.g. Nafion), which only function properly when they are in a highly hydrated state within a limited temperature range (<100 C), phosphoric acid-doped PBI can function at elevated temperatures (100– 200 C) under anhydrous conditions.
Benifits
-
Increased kinetics of the oxygen reduction reaction
-
Greater tolerance of the catalyst to CO
-
Simplification of the cooling and hydration system
Polybenzimidazole (PBI)
-
Good thermal stability
-
Good chemical stability
-
Good mechanical propertise
-
Low fuel crossover
-
High proton conductivity of acid-doped PBI