本實驗以黃光微影製程 (LIGA-like) 及微電鑄技術製作出蛇形及孔洞狀二種不同流道板，並以不同排列的方式組合出三種(分別為蛇(陽極)-蛇(陰極)、蛇-孔、孔-孔)反應面積各為1 cm2的微型質子交換膜燃料電池，本實驗除了以性能量測(VI曲線)的方式探討在不同流量、操作溫度、相對濕度下，此三種燃料電池組合的差異性外，更採用了電化學阻抗頻譜法 (electrochemical impedance spectroscopy, EIS)及以循環伏安法 (cyclic votammetry, CV)來分別對燃料電池量測所相對應的電化學阻抗頻譜圖及MEA膜的白金使用率(Pt utilization)。在實驗結果當中發現，雖然陰陽極皆為蛇形狀流道板的燃料電池在陰極需要額外的提供進氣壓力，但卻可有效的減少陰極水的堆積而使得擴散阻抗變小及提高整體燃料電池的性能。

In this study, two different flow field plates, a serpentine field plate and a perforated filed plate, were produced by LIGA-like formation and micro electroforming technology. The two type field plates were also used to make up three different types of micro proton exchange membrane fuel cells (µPEMFCs), serpentine (anode)-serpentine (cathode), serpentine-perforated, and perforated-perforated, each of whose active area is 1 cm2. In addition to the performance tests under different flow rate, operation temperature, and relative humidity conditions, electrochemical impedance spectroscopy (EIS) and cyclic votammetry (CV) methods were also adapted to measure correspondent EIS and Pt utilization of MEA. Even the fuel cell with serpentine field plates in anode and cathode needs more pressure input, the extra pressure is effective to avoid the water accumulation and to raise the total performance.

目錄............................................................................................................i
表目錄.......................................................................................................iv
圖目錄 ......................................................................................................v
符號說明..................................................................................................vii
中文摘要.................................................................................................. ix
英文摘要....................................................................................................x
第一章 序論............................................................................................1
1-1 前言...............................................................................................1
1-2 燃料電池簡介...............................................................................3
1-3 文獻回顧.......................................................................................6
1-4 研究目的.....................................................................................13
第二章 質子交換膜燃料電池元件設計與製作..................................16
2-1 質子交換膜燃料電池組成元件.................................................16
2-2 燃料電池組設計要點.................................................................21
2-3 質子交換膜燃料電池元件製作.................................................23
第三章 燃料電池性能分析..................................................................31
3-1 前言.............................................................................................31
3-2 極化曲線.....................................................................................32
3-2-1 活化極化 (activation polarizaton) ...................................33
3-2-2 歐姆極化 (ohmic polarization) ........................................34
3-2-3 濃度極化 (concentration polarization) ............................34
3-3 電化學理論分析.........................................................................35
3-3-1 電化學阻抗頻譜法 (EIS) 之量測原理...........................36
3-3-2 循環伏安法(CV)之量測原理...........................................40
第四章 實驗設備與材料......................................................................49
4-1 實驗設備與系統組件.................................................................49
4-2 實驗材料.....................................................................................52
第五章 誤差分析..................................................................................56
第六章 結果與討論..............................................................................61
6-1不同操作參數對燃料電池性能及電化學阻抗之影響..............62
6-2不同操作參數對MEA膜白金觸媒使用率之影響....................64
6-3不同流道對燃料電池性能、電化學阻抗及MEA膜白金觸媒使用率之影響..................................................................................65
第七章 結論與建議..............................................................................88
7-1 結論.............................................................................................88
7-2 建議與未來展望.........................................................................89
參考文獻..................................................................................................91
附錄A.......................................................................................................98

表 目 錄
頁次
表 2-1 流道幾何參數及實驗操作參數...............................................29
表 5-1 誤差分析...................................................................................60
表 6-1 相對濕度加熱換算表...............................................................70
表 6-2 等效電路各阻抗參數表...........................................................71

圖 目 錄
頁次
圖1-1 不同流道板之質子交換膜燃料電池組裝示意圖(a) 蛇形-蛇形(b) 蛇形-孔洞(c) 孔洞-孔洞...............................................15
圖2-1 流道板製程步驟......................................................................30
圖3-1 典型燃料電池極化曲線..........................................................43
圖3-2 電化學量測之輸入電壓、輸出電流與時間關係圖..............44
圖3-3 等效電路奈氏圖......................................................................45
圖3-4 (a) 簡單電阻及(b) 電化學反應電阻之等效電路及相對應的奈氏圖......................................................................................46
圖3-5 燃料電池整體等效電路及奈氏圖模型..................................47
圖3-6 質子交換膜燃料電池(PEMFC) 循環伏安法CV量測示意圖..............................................................................................48
圖 4-1 儀器設備..................................................................................55
圖 6-1 蛇形狀燃料電池流道板..........................................................72
圖 6-2 燃料電池測示環路圖..............................................................73
圖 6-3 (a) 蛇型氫氣管路(b) 加熱片(c) 加熱型濕度控制器示意圖 (d) 加熱型濕度控制器............................................................74
圖 6-4 蛇形狀燃料電池在25°C下不同流量最大功率分佈.............75
圖 6-5 蛇形狀燃料電池在不同相對濕度下之性能比較.................76
圖 6-6 蛇形狀流道板燃料電池在不同相對濕度之EIS量測分佈圖.............................................................................................77
圖 6-7 蛇形狀燃料電池在不同操作溫度之性能比較.....................78
圖 6-8 蛇形狀流道板燃料電池在不同溫度之EIS量測分佈圖.....79
圖 6-9 蛇形狀燃料電池在不同溫度及相對濕度下之CV量測結果.............................................................................................80
圖 6-10 Pt utilization與不同操作濕度及溫度之關係圖....................81
圖 6-11 不同形狀流道板之性能比較..................................................82
圖 6-12 在V=0.7下不同形狀流道板之EIS比較..............................83
圖 6-13 在V=0.3下不同形狀流道板之EIS比較..............................84
圖 6-14 在V=0.1下不同形狀流道板之EIS比較..............................85
圖 6-15 不同形狀流道板之CV量測結果...........................................86
圖 6-16 不同形狀流道板之MEA膜有效反應面積區........................87

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