Micro PEM Fuel Cells and Stacks

1 Results The effects of different operating parameters on micro proton exchange membrane (PEM) fuel cell performance were experimentally studied for three different flow field configurations (interdigitated,mesh,and serpentine).Experiments with different cell operating temperatures and different backpressures on the H2 flow channels,as well as various combinations of these parameters,have been conducted for three different flow geometries.The micro PEM fuel cells were designed and fabricated in-house through a deep UV lithography technique and the SU-8 photoresist was used as microstructure material for the fuel cell flow field plates.Results are presented in the form of polarization VI curves and PI curves under different operating conditions.The possible transport mechanisms associated with the parametric effects were discussed.Moreover,it was found that among the three flow patterns considered,significant improvements can be reached with a specified flow geometry.