磷酸燃料電池 (Phosphoric acid fuel cell, PAFC) 為高溫型之燃料電池，其操作溫度為100℃-250℃，和質子交換膜燃料電池(Proton exchange membrane fuel cell, PEMFC) 比起來具備較高的一氧化碳毒化 (CO poisoning) 容忍度，使其可與甲醇重組氣體這類的燃料來源進行搭配。同時，高操作溫度也有可簡化水熱管理等好處。然而磷酸燃料電池卻有電解質隨著時間而洩漏的問題，影響到電池之長效穩定性，使其發展受到限制。
本研究以植酸(phytic acid)改質之PtC觸媒(Pt/Vulcan-XC72R) 作為電極觸媒層，旨在以植酸之磷酸根提供質子傳導力，並同時提高陰極電極留存磷酸之能力，維持其質子傳導度，以維持電池之長效穩定性。
為了觀察改質前後的變化，本研究以FTIR確認觸媒上是否出現植酸特有的官能基；XPS用以計算表面官能基增加的數量；TGA測試材料在不同溫度分解的情形。最後，進行電池的性能測試。

Phosphoric acid fuel cell (PAFC) is a mid-temperature fuel cell that operates at a temperature range from 100℃ to 250℃. Comparing to the proton exchange membrane fuel cell (PEMFC), it has a higher CO tolerance than PEMFC, which makes it more compatible with varying fuel sources. In addition, the operating temperature benefits the hydrothermal management. However, the phosphoric acid fuel cell has the problem of electrolyte leakage during the operation, which affects the long-term stability of the battery and limits its development.
In this study, phytic acid-grafted Pt/C catalyst was added to the cathode electrode catalyst layer. The phytic acid is an environmental-friendly, non-toxic compound refined from the plant seeds. This research article is aiming to develop a proton conductible catalyst by grafting phytic acid onto the carbon surface of catalysts, meanwhile, enhancing the hydrogen bond between catalysts and the phosphoric acid. Wish to improve the long-term stability of the battery.
In order to observe the changes before and after the grafting process, the C-O-P bond generated between phytic acid and catalysts confirmed by FTIR and XPS spectrum; the decomposing behavior of grafted catalysts was tested by TGA test.
In this study, the leakage of phosphoric acid on the cathode side of MEA was tested by collecting the exhaust gas into water, then the water solution was analyzed by the ICP-MS. The grafted 70PA/PtC catalysts generated 455mW/cm2 at 160℃, and the voltage drop rate was minimize to +41.7μV/hr.

摘要 i
Abstract ii
圖目錄 viii
表目錄 x
第 一 章 緒論 1
1-1 前言 1
1-2 燃料電池簡介 1
1-3 燃料電池種類與原理 3
1-3-1 質子交換膜燃料電池(Proton Exchange Membrane Fuel Cell, PEMFC) 3
1-3-2 磷酸燃料電池 (Phosphoric acid fuel cell, PAFC) 4
1-3-3 鹼性燃料電池 (Alkaline fuel cell, AFC) 5
1-3-4 熔融碳酸鹽燃料電池 (Molten carbonate fuel cell, MCFC) 6
1-3-5 固體氧化物燃料電池 (Solid oxide fuel cell, SOFC) 7
1-3-6 直接甲醇燃料電池 (Direct Methanol Fuel Cell, DMFC) 8
1-4 質子傳導機制 11
1-5 植酸簡介 12
1-6 研究動機 12
第 二 章 基本原理與文獻回顧 14
2-1 燃料電池之電化學理論 14
2-1-1 電化學熱力學 14
2-1-2 電化學動力學 15
2-2 磷酸流失研究 16
2-3 電極技術簡介 17
2-3-1 無添加黏著劑電極 18
2-3-2 添加二氧化鈦電極 19
2-4 植酸應用研究 21
2-5 儀器原理及操作 28
2-5-1 傅立葉轉換紅外線光譜儀 (FTIR) 28
2-5-2 化學分析電子能譜儀(XPS/ESCA) 29
2-5-3 穿透式電子顯微鏡(TEM) 30
2-5-4 熱重分析儀 (TGA) 30
2-5-5 氮氣吸脫附儀(BET) 31
2-5-6 感應耦合電漿原子發射質譜儀(ICP-MS) 32
第 三 章 實驗方法 33
3-1 實驗藥品與材料 33
3-2 實驗設備 33
3-3 分析儀器 34
3-4 使用基材介紹 35
3-5 實驗流程圖 36
3-6 植酸改質 38
3-7 電極之製備 39
3-8 酸摻雜 (Acid doping) 與膜電極組 (MEA) 之製備 41
3-9 單電池測試 (Single cell test) 41
3-10 電池長效性測試 (Life time test) 42
第 四 章 結果與討論 44
4-1 植酸改質結果 44
4-1-1 表面官能基分析FTIR 44
4-1-2 表面元素及鍵結分析XPS 46
4-1-3 形貌分析TEM 50
4-1-4 熱重TGA分析 53
4-2 電池測試結果 54
4-2-1 單電池測試 54
4-2-2 電池長效測試 58
第五章 結論 62
第六章 參考資料 63

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