Channel-to-Rib Width Ratio Effects of Flowfield Plates in the Performance of a Micro-PEM Fuel Cell Stack

Effect of channel-to-rib width ratio of flow channel plates on micro proton exchange membrane fuel cell stacks performance test (VI/PI) was studied experimentally. The channel-to-rib width ratio was varied from 0.5 to 2. The optimum channel-to-rib width ratio of flow channel plates for micro PEM fuel cell stack was found. Copper metals were used to make bipolar plates (BPs) by using a LIGA-like micro-fabrication process of deep UV lithography in order to obtain SU-8 resist patterns/and SU-8 mould. Moreover, when the VI/PI performance curves were considered, an optimum channel-to-rib width ratio of I can be also obtained for the present study.