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研究生： 許維哲
Xu, Wei-Zhe
論文名稱： 夾持力對燃料電池雙極板界面電化學行為之影響研究
The Effect of Clamping Pressure on the Electrochemical Behavior at the Fuel Cell Bipolar Plate Interface
指導教授： 蔡文達
Tsai, Wen-Ta
學位類別： 碩士
Master
系所名稱： 工學院 - 材料科學及工程學系
Department of Materials Science and Engineering
論文出版年： 2012
畢業學年度： 100
語文別： 中文
論文頁數： 77
中文關鍵詞： 雙極板 、夾持力 、界面電化學行為
外文關鍵詞： bipolar plate, clamping pressure, electrochemical behavior of interface
相關次數： 點閱：122  下載：1 
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    • 本研究為了瞭解質子交換膜燃料電池堆之中，雙極板界面的電化學行為，設計模擬燃料電池電化學測試裝置，以1 M H2SO4水溶液模擬電解質環境，並對雙極板施予各種夾持力來觀測其界面的電化學行為。試片選用一般石墨雙極板以及利用物理氣相蒸鍍沉積於316L不銹鋼上的Zr鍍層。研究結果發現，做為氣體放出反應的水氧化與質子還原反應皆因施加壓力的增加而受到抑制，其原因是因為多孔介質孔隙率的下降，氣體產物的傳輸受到了阻礙並累積於界面所導致；而氧還原反應則是會受到施加壓力的增加而增強，其原因是因為壓力直接施加於液態電解質，增加了反應物的壓力或是濃度所導致。此外Zr鍍層的金屬溶出反應不直接受壓力的影響，並且壓力的增加導致了雙極板所處的環境更具有還原性。

    The effect of clamping pressure on the electrochemical behavior at the bipolar plate interface in the PEM fuel cell stack was studied by employing a self-designed simulating cell. The simulating cell consisted of a layer of non-woven fabric which was filled with 1M H2SO4 solution, acting as the electrolyte/separator assembly. A graphite plate or a Zr-coated 316L stainless steel plate was used as the working electrode. The experimental results are described as followings : (1) The cathodic reaction on the graphite electrode consisted of proton and oxygen reduction reaction. The latter reduction reaction rate increases with increasing clamping pressure, while the former is less affected. (2) The anodic reaction occurred on graphite electrode is mainly associated with oxygen evolution resulting from the oxidation of water. The reaction rate decreases with increasing clamping pressure. (3) On Zr-coated 316L SS electrode, the reduction rate (especially proton reduction ) increases with increasing pressure. The anodic reaction occurred on this electrode is mainly governed by the passivation of Zr.

    中文摘要 I Abstract II 誌謝 III 第一章 前言 1 第二章 理論基礎與文獻回顧 2 2.1 燃料電池的種類與原理 2 2.2 質子交換膜燃料電池的原理與構造 6 2.2.1 質子交換膜 7 2.2.2 觸媒層 7 2.2.3 氣體擴散層 8 2.2.4 雙極板 8 2.2.5 雙極板的特性需求 8 2.2.6 雙極板的發展與材料選擇 11 2.2.7 金屬雙極板的腐蝕 12 2.3 壓力與雙極板界面 18 2.3.1 夾持力對界面接觸阻抗的影響 18 2.3.2 夾持力對氣體擴散層的影響 19 2.3.3 夾持力對質子交換膜燃料電池效能的影響 20 2.3.4 雙極板界面的電化學行為 20 第三章 實驗方法與步驟 26 3.1 石墨雙極板界面的電化學行為測試 26 3.1.1. 電化學測試裝置的設置 26 3.1.2. 電化學行為測試 26 3.2 鍍鋯之不銹鋼雙極板界面的電化學測試 27 3.2.1. 試片的組成與製備 27 3.2.2. 鋯鍍層的性質分析 27 3.2.3. 電化學行為測試 28 第四章 結果與討論 31 4.1 石墨雙極板的電化學測試 31 4.1.1 動電位極化曲線測試與不同電位之定電位測試 31 4.1.1.1 理論平衡電位計算 32 4.1.1.2 陽極區電化學行為 34 4.1.1.3 陰極區電化學行為 36 4.1.2 不同壓力下之定電位測試 38 4.1.3 循環伏安測試 42 4.2 鋯鍍層雙極板的電化學測試 60 4.2.1 材料性質分析 60 4.2.2 動電位極化曲線測試 60 4.2.3 循環伏安測試 61 4.2.4 電化學阻抗頻譜測試測試 63 第五章 結論 72 參考文獻 73

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