Monday, 14 October 2019
Grand Ballroom (The Hilton Atlanta)
Anion Exchange Membrane fuel cells (AEMFCs) have received much attention in recent years due to its potential to lower the cost of polymer-based fuel cells for both mobile and stationary applications. However, AEMFCs have notoriously struggled with low performance and poor durability compared to proton-exchange membrane fuel cells (PEMFCs), despite the fact that each of the individual components of the cell (membrane, catalyst, etc.) shows very strong ex-situ performance. This suggests that the primary issue with modern AEMFCs is not fundamental, but engineering. Therefore, our group has focused on developing methodologies to deploy the most advanced materials available in operating AEMFCs. This has included improving operational protocols (manipulation of temperature, pressure, reacting gas dew points, etc.) to control the cell-level water dynamics [1-2]. We have also focused on component fabrication techniques, most notably tight control over the ionomer:carbon:catalyst loading [3] and hydrophilicity/hydrophobicity of the anode and cathode electrodes. This poster will focus on such electrode designs that have allowed our team to routinely achieve high AEMFC performance (> 2000 mW/cm2 peak power densities) and long life (> 1000 h with minimal loss in operating voltage at 600 mA/cm2).
