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系統識別號 U0026-3107201210443300
論文名稱(中文) 重組氣體對高溫型質子交換膜燃料電池影響之研究
論文名稱(英文) Effects of Reformate on PBI/H3PO4 Proton Exchange Membrane Fuel Cells
校院名稱 成功大學
系所名稱(中) 航空太空工程學系碩博士班
系所名稱(英) Department of Aeronautics & Astronautics
學年度 100
學期 2
出版年 101
研究生(中文) 陳宜寬
研究生(英文) Yi-Kuang Chen
學號 P46994096
學位類別 碩士
語文別 中文
論文頁數 131頁
口試委員 指導教授-賴維祥
口試委員-江滄柳
口試委員-顏維謀
中文關鍵字 高溫型質子交換膜燃料電池  聚苯並咪唑  磷酸  氫氣濃度  交流阻抗 
英文關鍵字 Proton exchange membrane fuel cell (PEMFC)  Polybenzimidazole (PBI)  Phosphoric acid  Hydrogen concentration  Electrochemical impedance spectroscopy (EIS) 
學科別分類
中文摘要 近年來所發展的重組器設備,其產出之富氫氣體皆需經過純化處理,才能使一氧化碳濃度降低至燃料電池能夠承受的範圍,因此,為使燃料電池對於一氧化碳容忍程度能夠提升,並且簡化純化過程,故發展出高溫型質子交換膜燃料電池。PBI/磷酸型燃料電池為目前最具發展潛力的高溫型質子交換膜燃料電池之一,因此,本研究以此型燃料電池做為研究主題,探討重組氣體參數對其性能之影響。
本研究中,採用自製之氣體混合機提供陽極模擬重組氣體燃料之來源,利用燃料電池測試機台所獲得之數據,可獲得極化曲線、長時間定電流測試與電化學交流阻抗方法進行燃料電池性能及阻抗之分析,探討參數包括溫度、氫氣濃度及一氧化碳濃度。實驗結果顯示,高溫型燃料電池性能對一氧化碳的容忍度隨著溫度上升而增加;另外,降低氫氣濃度則會使一氧化碳對電池性能與阻抗之影響變得更顯著。另一方面,過低的氫氣濃度(50%)及過高的一氧化碳濃度(3%)會使燃料電池的電壓無法操作於安全範圍內,並且有可能造成連續振盪的現象。
英文摘要 The reformate gas produced from a reformer has to be purified in order to reduce the carbon monoxide concentration to a range which is tolerable for a proton exchange membrane fuel cell. One of the key points to break through the limit of the carbon monoxide tolerance is the operation temperature of the fuel cell. Thus, a high temperature proton exchange membrane fuel cell is developed to improve the carbon monoxide tolerance and to simplify the gas purification process. The polybenzimidazole-based phosphoric acid-doped fuel cell is one of the most promising systems for a high temperature proton exchange membrane fuel cell.
In this study, a self-made gas mixer is used to supply simulated reformate gases with different hydrogen and carbon monoxide concentrations into the fuel cell. The polarization curve, the long term galvanostatic analysis and the electrochemical impedance spectroscopy are used to analyze the performance and the impedance of a high temperature proton exchange membrane fuel cell. The parameters include the operational temperature, carbon monoxide concentration and the hydrogen concentration respectively. The experimental results show that the carbon monoxide tolerance of a polybenzimidazole-based phosphoric acid-doped fuel cell increases with increasing the operational temperature. In addition, effects of carbon monoxide on the fuel cell performance and the impedance become more significant while decreasing the hydrogen concentration. On the other hand, a low hydrogen concentration(50%) and a high carbon monoxide(3%) concentration may result in a dangerous low voltage a voltage fluctuation.
論文目次 中文摘要 I
Abstract II
誌謝 III
目 錄 IV
表目錄 VI
圖目錄 VII
符號 XIII
第 1 章 緒論 1
1-1 前言 1
1-2 研究動機 4
1-3 文獻回顧 6
1-4 研究目的 16
第 2 章 基本原理 17
2-1 燃料電池簡介 17
2-2 質子交換膜燃料電池基本構造 18
2-2-1 質子交換膜 19
2-2-2 電極觸媒層 20
2-2-3 氣體擴散層 21
2-2-4 氣密墊片 21
2-2-5 石墨流道板 22
2-2-6 集電板 22
2-2-7 端板 23
2-3 質子交換膜燃料電池運作原理 23
第 3 章 實驗設備 27
3-1 燃料電池規格 28
3-1-1 燃料電池外觀 28
3-1-2 膜電極組 29
3-1-3 加熱及保溫元件 30
3-2 燃料電池測試平台 31
3-3 氣體混合機 32
3-4 即時氣體分析儀 35
第 4 章 實驗與研究方法 37
4-1 極化曲線 37
4-1-1 活化損失 38
4-1-2 歐姆損失 39
4-1-3 質傳損失 40
4-1-4 燃料穿透及內電流 42
4-2 電化學阻抗頻譜分析 43
4-2-1 質子交換膜燃料電池EIS分析 45
4-2-2 等效電路 46
4-3 陽極觸媒表面電化學現象 51
4-4 實驗矩陣 52
4-5 實驗前置處理 54
4-6 實驗步驟 56
第 5 章 結果與討論 57
5-1 膜電極組再現性測試 57
5-2 高溫型質子交換膜燃料電池性能與阻抗分析 60
5-2-1 氫氣濃度對性能與阻抗之影響 63
5-2-1-1 氫氣濃度75 %對燃料電池之影響 69
5-2-1-2 氫氣濃度50 %對燃料電池之影響 72
5-2-2 溫度對阻抗之影響 75
5-3一氧化碳對高溫型質子交換膜燃料電池之影響 79
5-3-1 溫度對燃料電池性能及阻抗之影響 79
5-3-2 一氧化碳對燃料電池阻抗之影響 93
5-3-3 氫氣及一氧化碳濃度對性能與阻抗之影響 98
5-3-4 一氧化碳對燃料電池長時間之影響 106
5-3-4-1 純氫及不同一氧化碳濃度長時間之影響 108
5-3-4-2 氫氣濃度75 %及不同一氧化碳濃度長時間之影響 112
5-3-4-3 氫氣濃度50 %及不同一氧化碳濃度長時間之影響 115
第 6 章 結論與未來工作 120
6-1 結論 120
6-2 未來工作 122
參考文獻 123
自述 130
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