臺灣博碩士論文加值系統

本論文是利用具有微孔洞的poly (tetrafluoro ethylene) (PTFE)膜為支撐物，分別塗佈PBI / DMAc溶液及PBI / PP混合液，製備PBI / PTFE及PBI-PP / PTFE複合膜。我們利用SEM (scanning electron microscope)觀察膜材表面以及截面的結構、TGA (thermogravimetric analysis)分析膜材熱穩定性。並將PBI / PTFE及PBI-PP / PTFE複合膜材製作成膜電極組(MEA)，在160℃進行H2 / O2單電池測試。實驗數據顯示，複合膜應用於高溫PEMFC具有優異性能。

In this study, high mechanical strength porous (polytetra fluoro ethylene) (PTFE) is as a supporting membrane, for fabricating polybenzimidazole (PBI) resin composite membranes. FTIR, scanning electron microscope (SEM) and energy dispersion spectroscopy (EDS) studies show that PBI is well laminated with the porous PTFE. The composite membranes are used to prepare membrane electrode assemblies (MEAs) and carry out fuel cell tests. We show a good fuel cell performance is obtained of these MEAs at 160℃ with unhumidified H2/O2 fuel gases.

摘要 I
Abstract II
目錄 IV
表目錄 VII
圖目錄 VIII
第一章序論 1
1.1 前言 1
1.2 燃料電池簡介 3
1.3 質子交換膜簡介 4
1.4 聚苯並咪唑的合成及在燃料電池的應用 6
1.4.1 PBI的合成 8
1.5 聚四氟乙烯（PTFE）簡介 11
1.5.1 Nafion/PTFE複合膜於燃料電池之應用 11
1.5.2 PBI / PTFE複合膜 11
1.5.3 PBI-PPA / PTFE及 PBI-PPA-H3PO4 / PTFE 膜材製作 12
1.6 高溫質子交換膜燃料電池（PEMFC） 15
1.7 研究目的 16
第二章實驗 18
2.1 實驗流程 18
2.2 實驗試藥 19
2.3 儀器設備 20
2.4 實驗步驟 21
2.4.1 PBI合成及鑑定 21
2.4.2 PBI / PTFE複合膜的製作 23
2.4.2.1 PBI / PTFE複合膜製作流程 24
2.4.3 PBI-PPA- H3PO4 / PTFE複合膜的製作流程 25
2.4.3.1 PBI-PPA-H3PO4 / PTFE複合膜的分析鑑定 26
2.5 質子交換膜分析鑑定 27
2.5.1 SEM觀察膜材的表面及截面 27
2.5.2 TGA熱穩定性分析 27
2.5.3 機械性質測試 27
2.6 電極的製備 28
2.7 質子交換膜燃料電池（PEMFC）單電池測試 29
2.7.1 單電池組裝 30
2.7.3單電池性能測試 32
2.7.3交流阻抗法 (AC impedance) 33
2.8 PBI / PTFE膜電極組循環老化測試及電池失誤診斷分析 41
2.8.1 電池開關循環測試及電化學性質分析步驟 42
2.8.2 循環伏安法(CV)於電極觸媒活性評估 43
2.8.3 計算電極活性面積 45
2.8.4 線性掃描伏安法於燃料電池質子交換膜抗氫氣穿透評估 46
2.8.5 計算氫氣穿透量 47
第三章結果與討論 48
3.1 PBI的合成及結構分析鑑定 48
3.1.1 PBI的霍式紅外光譜（FTIR）分析 48
3.2膠體滲透層析（Gel-Permeation Chromadography, GPC） 51
3.3複合膜的分析鑑定 53
3.3.1複合膜材機械性質測定 53
3.3.4複合膜熱重分析儀（TGA）測試 55
3.3.5複合膜材之SEM分析 56
3.4高溫質子交換膜燃料電池測試(PEMFC) 60
3.4.1 PBI / PTFE複合膜之PEMFC測試 60
3.4.2PBI-PPA / PTFE及PBI-PPA-H3PO4 / PTFE之PEMFC測試 62
3.4.3不同複合膜材比較測試 65
3.5 PBI /PTFE複合膜高溫單電池開12 h/關12 h (on 12 h/off 12 h)循環操作測試 69
3.5.1 PBI /PTFE複合膜高溫單電池開12 h/關12 h (on 12 h/off 12 h)循環操作測試之觸媒活性及氣體穿透性分析 74
第四章結論 77
第五章 參考文獻 78

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