ANN ARBOR, MI
The latest research by Dr. Liang Wang from TRINA’s Materials Research Department (MRD), published in the *International Journal of Hydrogen Energy*, investigates the use of yttrium-doped cerium oxide (CeO2·Y2O3) as a free radical scavenger to improve the durability of Proton Exchange Membrane Fuel Cells (PEMFCs). The study compares Membrane Electrode Assemblies (MEAs) incorporating CeO2·Y2O3 with those using pure CeO2 and those without any free radical scavengers.
The results of the accelerated stress test (50-hour open circuit voltage hold) reveal that MEAs with CeO2·Y2O3 showed significantly better performance retention compared to both MEAs with pure CeO2 and those without scavengers. Key analyses such as Electrochemical Surface Area (ECSA), Mass Activity (MA), and Electrochemical Impedance Spectroscopy (EIS) further confirmed the durability enhancement in MEAs with CeO2·Y2O3.
Additionally, the research highlights that MEAs with CeO2·Y2O3 experienced lower fluoride emission rates, suggesting better protection of the polymer components against free radicals. The ex-situ Fenton test combined with ICP-MS analysis supported the finding that CeO2·Y2O3 enhances the stability of cerium ions, improving the material’s resistance to dissolution.
For detailed information, please refer to the published paper in International Journal of Hydrogen Energy