Abstract
The objective of this study is to investigate appropriate configuration used for micro direct methanol fuel cells (DMFCs). We designed grid and spiral flow fields of electrode plate and simulated with ANSYS. Using silicon-based micro–electro–mechanical systems (MEMS) technology to fabricate the DMFCs with different flow fields and tested at room temperature. Grid flow field can effectively improve methanol mass transport performance and exhibit higher cell efficiency than spiral flow field, demonstrating 13 mAcm-2 and 3.9 mAcm-2 in peak current density respectively and the peak difference of power density is nearly an order of magnitude. We tested Cell performance in different concentration methanol and it shows the best performance in concentration 2M.
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