質子交換膜燃料電池系統為了保持性能與耐用性，需要水來維持其操作過程中的離子導電度，為了使質子交換膜燃料電池系統操作在較適當的環境，通常會在系統內裝置增濕器，但為了減輕系統重量、空間及簡化系統，因此希望能開發在無外部增濕的條件下，讓質子交換膜燃料電池能順利運行。
本研究將二氧化矽添加於觸媒層及氣體擴散層上，藉由二氧化矽的親水性，使電池較易操作於在低相對濕度的條件下，而研究發現些許的二氧化矽添加，使得膜材能保留較多水分，對電池操作在低相對濕度條件下能有較佳性能，但研究發現添加過量的二氧化矽會造成水分不易排出，導致氣體不易進入觸媒層，進而影響電池性能。

xchange membrane fuel cell needs water sufficient to keep its ionic conductivity. However, the proper environment for proton exchange membrane fuel cell demands an interior humidifier. This experiment tried to decrease the weight, and to simplify the system, which still make possible the operation of the proton exchange membrane fuel cell even without external humidifying.

This study had silica added to the catalyst layer and gas diffusion layer; the hydrophilicity of silica makes battery likely to operate in the condition of low relative humidity. Besides, the addition of silica has membrane keep more humidity, which led to better operation of the battery under low relative humidity. However, the study also led to the result that too much silica would have humidity stuck within, and have air find no easy access to the catalyst layer—both of these would affect the efficiency of battery.

目錄
書名頁 I
審定書 II
授權書 III
中文摘要 IV
英文摘要 V
誌謝 VI
目錄 VII


第一章緒論 1
1.1前言 1
1.2研究背景與動機 2
1.3 研究目的 3
1.4文獻回顧 3
第二章 實驗方法與流程 8
2.1實驗操作條件與方法 8
2.2電池構造 8
2.2.1薄型電極(Catalyst Coated Membrane) 8
2.2.2氣體擴散層 9
2.2.3膜電極組 9
2.2.4防漏墊片 9
2.2.5石墨流道板 10
2.2.7端板 10
2.3實驗設備 11
2.4氣體擴散層處理 11
2.5 薄型電極(Catalyst Coated Membrane)製備 12
2.6氣體擴散層物理性質量測 13
2.6.1厚度 13
2.6.2接觸角 13
2.6.3氣體滲透率 14
2.6.4導電性質 15
第三章 結果與討論 15
3.1氣體擴散層物理性質量測 16
3.1.1厚度 16
3.1.2接觸角 16
3.1.3氣體滲透率 16
3.1.4導電性質 17
3.2商購薄型電極(CCM)與自製薄型電極比較 17
3.3添加二氧化矽在氣體擴散層對薄型電極影響 18
3.3.1操作於不同加濕條件對商購薄型電極之影響 18
3.3.2操作於不同加濕條件對自製薄型電極之影響 20
3.4添加二氧化矽在觸媒層操作於不同加濕條件下對自製薄型電極之影響 21
3.5 添加二氧化矽在觸媒層與氣體擴散層之比較 23
第四章 結論與未來建議 24
4.1 結論 25
4.2 未來建議 25

參考文獻 27

 

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