近年來微流體燃料電池受到相當的矚目，由於其具備體積小、高功率密度以及無須質子交換膜等特性，因此可成為可攜式電子產品電源供應裝置。本研究針對探討電極表面結構對於電池效能的影響作探討，我們將電極設置於上、下平板以利於製作三維電極結構，另使用去離子水及螢光溶液模擬燃料和氧化劑於微流道中的分層與擴散並以雷射掃描共軛焦顯微鏡觀察螢光分子於流道中的分布。而為了增加電極表面積，我們在電極上製作不同規格的圓柱。實驗結果發現，兩股流的流態及分層情形會隨著不同圓柱結構有所改變，當圓柱高度越高時，流體界面會越靠近平板。至於微流體燃料電池，我們發現藉由改善濺鍍白金觸媒的均勻性可提高電池效能。當燃料(甲酸溶液)與氧化劑(過氧化氫溶液)流體流率皆為8 ml/hr時，可得到最大電流密度6.02 mA/cm2及最大功率密度1.34 mW/cm2。而隨著圓柱高度增加，最大功率密度也隨著增加當圓柱，當高度為120um時，可得到之最大電流密度為9.8 mA/cm2及最大功率密度為2.6 mW/cm2。

In this study, the vertical streaming of two fluid flows and diffusion inside the microchannel with micropillar array were investigated. Moreover, the effect of the micropillar electrodes on the performance of microfluidic fuel cell (MFC) was discussed. It was found that the interface between two fluid flows moved away from the center line and toward the plane surface as the height of the micropillars increased. In addition, the diffusion zone increased after the fluid flowing through the micropillar array. As to the performance of MFC, the uniformity of the platinum provided better MFC efficiency. The maximum current and power density increased as the height of micropillars increased up to 20 micron and, in this study, were measured 9.8 mA/cm2 and 2.6 mW/cm2, respectively using 120 micron micropillar array.

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