Abstract
It is important to improve the power generation efficiency of polymer electrolyte fuel cell (PEFC). In this study, we visualized a partial pressure of oxygen at a surface of gas diffusion layer (GDL) in a cathode of an operating PEFC using the oxygen sensitive luminescent polymer. It was confirmed that the PEFC performance wasn't affected by painting the polymer on the GDL. We would inspect a characteristic of the oxygen consumption by the shape of gas flow channel by visualizing the oxygen distribution in the gas flow channel.
