有鑑於質子交換膜燃料電池 (Proton Exchange Membrane Fuel Cell, PEMFC)以氫氣為燃料，不利儲存與攜帶，因此本研究主要發展可撓曲微型直接甲醇燃料電池 (Direct Methanol Fuel Cell, DMFC)，並應用於未來的穿戴式電子設備。本實驗首先將商用觸媒配製成漿料，以噴塗方式將觸媒層乘載於碳布上，接著分析不同觸媒與Ionomer比例之電化學性質，結果顯示Pt/C與Ionomer比例為18：1時有最佳的效能，其電化學活性面積 (Electrochemical catalyst surface activity, ECSA)為417.80 cm2/mg，質量活性 (mass activity)為51.05 A/g，以此比例進行Pt-Ru/C的電化學分析後，可以發現其If/Ib為3.41，證實二元觸媒可改善CO毒化的問題，經由SEM表面分析，得知觸媒表面皆有團聚現象發生，推測是觸媒效能不佳；接著進行DMFC單電池測試，結果在水平式並在常溫下操作以2 M甲醇，流量為0.5 sccm的效能最佳，其輸出功率為7 mW/cm2；接著以自行設計的PMMA模具進行單電池測試，氧氣採被動式進料，最高效能為1.6 mW，其開路電位為0.4 V，主要是甲醇洩漏造成混合電位發生；為了改善觸媒團聚現象，透過觸媒乘載量下降再次進行商用單電池量測，發現輸出功率提升至20 mW/cm2；研究最後以自行設計的PDMS模具進行單電池測試，氧氣採被動式進料，最高效能為1.8 mW，其開路電位為0.554 V，另外在曲率半徑為2吋 (5.08 cm)與1吋 (2.54 cm)下的輸出功率分別為0.708 mW以及0.656 mW，結果顯示封裝仍是需要克服的問題。

PEMFC uses H2 as fuel, this kind of gas is hard to storage and transport, so we develop flexible DMFC and apply on wearable electronic devices. In this study, catalyst ink was prepared by commercial catalyst. Different proportions of Pt/C catalyst and ionomer were prepared and analyzed by electrochemical method. The result shown that 18:1 is the best proportion, electrochemical catalyst surface activity, and mass activity was 417.80 cm2/mg and 51.05 A/g, respectively. Using this proportion on Pt-Ru/C, the result indicated that binary catalyst can improve CO poisoning effect and the If/Ib value was 3.41. From the SEM images, the catalyst surface shown agglomeration, it may lower the catalyst activity. Single cell tested in room temperature and horizontal mode shown the best performance which was 7 mW/cm2 by 2 M methanol, the flow rate was 0.5 sccm. Then we did further, using PMMA as single cell structure which was designed by our-self. The O2 was air-breathing mode, and the highest performance was 1.6 mW, open circuit voltage was 0.4 V because of methanol leakage then occurred mix potential effect. In order to overcome catalyst agglomeration, the loading of catalyst was decreased then tested the single cell again, the result shown that the performance was enhanced to 20 mW/cm2. Finally, PDMS was used as single cell structure which was designed by our-self as well. The O2 was air-breathing mode, and the highest performance was 1.8 mW, open circuit voltage was 0.554 V. In addition, when single cell tested in different curvature radius which were 2 inch (5.08 cm) and 1 inch (2.54 cm), the performance were 0.708 mW and 0.656 mW, respectively. However, the package problem still needs to overcome.

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