臺灣博碩士論文加值系統

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%。

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.

中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 前言 1
1.2 燃料電池種類 2
1.2.1 磷酸型燃料電池 4
1.2.2 鹼液型燃料電池 4
1.2.3 融溶碳酸燃料電池 4
1.2.4 固態氧化燃料電池 5
1.2.5 質子型燃料電池 5
1.2.6 直接甲醇燃料電池 5
第二章 DMFC理論基礎與原理 …………………………………… ….6
2.1 DMFC簡介 6
2.1.1 膜電極組 7
2.1.2 氣體擴散層…..……..……..……..……..……..……..….. 9
2.1.3 觸媒(催化)層……..……..……..……..……..…….. ……..9
2.1.4 觸媒载體 10
2.1.5 碳黑……..……..……..……..……..……..……..……..….10
2.1.6 奈米碳管……..……..……..……..……..……..………….11
2.1.7 觸媒製備 11
2.1.4 雙極板 12
2.2直接甲醇燃料電池之工作原理 15
2.2.1 DMFC的極化現象 17
第三章 實驗設備與步驟 19
3.1 化學藥品與材料 19
3.2 設備儀器 20
3.3 膜電極組製備 21
3.3.1 質子交換膜前處理 21
3.3.2 Pt/CB, Pt/Ru/CB 觸媒製備 22
3.3.3 電極漿料及氣體擴散層製備 25
3.3.4 膜電極組熱壓 27
3.4 製備PCB雙極板 28
3.4.1 製作光罩 30
3.4.2 上光阻劑 30
3.4.3 影像轉移 32
3.4.4 顯影蝕刻 33
3.5 製備氣密墊片 33
3.6 扭力鈑手 35
3.7 燃料 35
3.8 實驗架設 36
3.8.1 量測裝置 37
3.8.2 甲醇水流量及溫度控制裝置 37
3.9 單電池組裝及實驗 39
3.9.1 組裝步驟 39
3.9.2 實驗流程 40
3.9.3 直接甲醇燃料電池之測試方法 41
第四章 結果與討論 42
4.1 螺絲扭力對電池的影響 42
4.2 甲醇濃度對電池的影響 45
4.3 甲醇流量對電池的影響 47
4.4 甲醇溫度對電池的影響 49
第五章 結論與未來展望 51
5.1 結論 51
5.2 未來展望 51
參考文獻 52

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