4807 Analysis on Distribution of Electric Generation in PEFC

Abstract

In this paper, we have analyzed electric current distribution on an electrode of PEFC. We measure both electric current under rib and channel areas, and thereby calculate current ratio between them. Since the separator is pressed directly on the GDL, contact resistance is possibly small. On the other hand, smoothly supplied fuel in the channel area possibly leads to active reaction. In order to obtain the current ratio, we prepare 3 types of the GDL. First one is prepared by removing the rib area. Second one is prepared by removing the channel area. And last one is used without any treatment. We compare the performances of them and calculate ohmic resistances under the rib and under the channel. From the ohmic resistance ratio, it seems that about 84% of electricity is generated under the rib area.