- 學位論文
利用印刷電路板(PCB)數位封裝製程製備直接甲醇燃料電池組之研究
Using PCB digital assembly process to preparation and characterization for Direct Methanol Fuel Cell
摘要
本文主要是探討自製Pt/Ru/CB膜電極組(membrane- electrolyte assembly ,MEA)之製備，並與直接甲醇燃料電池組(Direct methanol fuel cell ,DMFC)以印刷電路板製程封裝後量測整體DMFC之效率(efficiency)。本文所組裝之DMFC，其元件包含陽極(Anode)流道板(flow field plates)，MEA及集電板。其中以陽極流道板與集電板材料為印刷電路板，流道板型式使用蛇行流道(serpentine flow field)。本文所開發之Pt/Ru/CB膜電極組(MEA)，係將材質為碳紙的主體，分別在兩側以Pt/Ru/CB組合，最外側則以氣體擴散層(Gas diffusion layer ,GDL)結合，並使用熱壓機組裝之。DMFC之效能測試上，係使用液體馬達將特定溫度之甲醇混合水溶液打入DMFC中。此外，DMFC的陰極端(cathode)採用與空氣(air)自然呼吸(natural-breath)方式，並以直流電子負載器(DC Electronic Load)先活化(activation)DMFC，觀測起始電壓值(operating voltage ,OCV)，再進行定電壓(constant Voltage)量測電流的實驗，以計算DMFC效率。此外藉由TEM(Transmission electron microscope) 檢測Pt/Ru膜電極組結構(structure)。經由初步的電流-電壓曲線(I-V curve)之檢測結果顯示，以自製含有Pt/Ru膜電極組(MEA)，組裝測試後發現，與商業用MEA的DMFC整體電流密度(current density)可提升0.2%。
並列摘要
This study aims to deal with the preparation of membrane-electrolyte assembly (MEA) of Pt/Ru/CB nanocomposite as well as connecting to a direct methanol fuel cell and using PCB process packaging to test the efficiency of the DMFC. The components assembled in DMFC are including anode flow field plates, MEA and current collector.Using PCB boards for the anode flow field plates as well as the electicity collector plates and the type of flow field plate adopts serpentine flow field. Pt/Ru/CB MEA developed in this study uses carbon paper as main body, assembling Pt/Ru/CB MEA in two sides respectively and combining with gas diffusion layer (GDL) in the most lateral and assembling with the hot-pressing units. For the efficiency of DMFC, liquid motors are used to press methanol mixed solution at specific temperature into DMFC. Besides, the cathode of DMFC adopts natural-breath method with air and uses DC electronic load to activate DMFC to investigate operating voltage (OCV) and further to set constant voltage to measure current to calculate the efficiency of DMFC. In addition, Transmission electron microscope TEM is employed to measure the structure of Pt/Ru/CB MEA. Initial results of I-V curve show that self-developed MEA of Pt/Ru/C nanocomposite can enhance around 0.2% current density of DMFC after being assembled like commercial MEA.
參考文獻
延伸閱讀
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