Investigation of Overpotentials in High Temperature Proton Exchange Membrane Fuel Cells
Dr. Roswitha Zeis
High temperature proton exchange membrane fuel cells (HT-PEFC) based on phosphoric acid doped polybenzimidazole (H3PO4/PBI) membrane is a relatively new and fast growing research field. Compared with the conventional low-temperature PEFC, the HT-PEFC has much higher tolerance to impurities such as CO in the hydrogen fuel and much simplified thermal and water management because of its elevated operation temperature, typically in the range from 150°C to 200°C. At this moment, however, no commercial HT-PEFCs have been developed to meet the reliability and cost requirement. The young investigator group is exploring this field to understand the performance limiting mechanisms and try to find effective solutions.