Direct Visualization of Oxygen Distribution in Operating Fuel Cells

Abstract

Cell diagnosis: The oxygen distribution in the interior of operating fuel cells can be visualized by using dye films painted on the transparent gas flow field (see image). The spatial and time resolutions are 300 μm and 500 ms, respectively. The oxygen distribution in a polymer electrolyte membrane fuel cell was not in accordance with that expected from the current, suggesting a significant contribution from water. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z705516_s.html or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.