Study of Alkaline Electrodes for Hybrid Polymer Electrolyte Fuel Cells

Murat Ünlü, Junfeng Zhou, Paul A. Kohl
2010 Journal of the Electrochemical Society  
Hybrid polymer electrolyte fuel cells combine a proton exchange membrane ͑PEM͒ and anion exchange membrane ͑AEM͒ and exhibit unique advantages. The electrochemical performance and current limitations of a hybrid cell with an alkaline electrode fabricated on a Nafion membrane was characterized at 70°C as a function of relative humidity. To separate the individual characteristics of the AEM anode and cathode electrodes, two semihybrid cell configurations, each with an AEM and PEM electrode, were
more » ... EM electrode, were constructed and compared to a conventional PEM fuel cell. Electrochemical impedance spectroscopy was used to diagnose the cell component characteristics. In particular, low catalyst utilization in the AEM electrode was a primary factor in the performance losses in the hybrid cells.
doi:10.1149/1.3468700 fatcat:2fnz52fskzcovf5rczvuasrfaq