Abstract
Individual overpotential contributions to PEM Fuel Cell performance are examined to determine how these change during long operating times. The cathode mass-transport overpotential and its relationship to O2 diffusion mechanisms and liquid- water transport is examined in detail. A method, governing equation, and durability case study is presented here for estimating both overpotential contributions as a function of testing time, as well as the breakdown of mass-transport overpotential for the cathode Gas Diffusion Layer (GDL) and catalyst layer. The importance of correlating component characterization with this durability data is also shown using high-resolution scanning electron microscopy (HRSEM) and pore- size distribution (PSD) measurements obtained with Hg and H2O porosimetry.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
