以陽極除水法提高質子交換膜燃料電池性能之研究 陳玠汶、鄭錕燦
E-mail: [email protected]
摘 要
質子交換膜燃料電池(PEFC)具有能量密度高、容易起動與關機、壽命長等優點，是現今低溫燃料電池 中，最有發展潛力的 一種燃料電池。它適合使用於電動車輛、筆記型電腦、行動電話等裝置，無疑地它 將會成為未來主要行動電力的來源。質 子交換膜燃料電池的『水管理』對其性能影響甚大，若『水管理 』做得好則燃料電池的效率與性能就會較佳，因此『水管 理』是質子交換膜燃料電池的關鍵技術之一， 本論文即在於探討燃料電池的『水管理』的相關問題。 本研究建構了一個 質子交換膜燃料電池的數學模型，並依據此一數學模型發展出一電腦模擬程式，該 電腦模擬程式即用以模擬燃料電池的運 轉。燃料電池的運轉過程中，質子交換膜含水量的變化、陰極水 份泛溢的情形，皆在探討之列。此外，利用陽極除水法將 陰極的積水移除，以減少陰極的氧氣質傳阻礙 ，提升燃料電池的性能，亦是本論文的探討重點。
關鍵詞 : 質子交換膜燃料電池、陽極除水法、水管理、泛溢、性能 目錄
第一章 緒論--P1 1.1前言--P1 1.2燃料電池的介紹--P2 1.2.1燃料電池的基本原理--P2 1.2.2燃料電池的性能--P3 1.2.3燃料電池 的種類--P5 1.2.4 質子交換膜燃料電池的構造及待解決的問題--P6 1.3陽極除水法的基本原理--P9 1.4文獻回顧--P9 1.5研究動 機與目的-P11 第二章 研究方法--P13 2.1可逆電壓--P14 2.2歐姆過電位--P15 2.2.1質子交換膜所造成的歐姆過電位--P15 2.2.2 氣體擴散層所造成的歐姆阻抗--P16 2.2.3 流道板所造成的歐姆阻抗--P17 2.3陰極過電位--P17 2.3.1陰極的統御方程式--P17 2.3.2陰極的邊界條件--P21 2.4陰極之質傳現象--P22 2.5陰極的水平衡--P24 第三章 結果與討論--P34 3.1理論模型之驗證--P34 3.2質子交換膜燃料電池內部性質的變化情形--P35 3.2.1觸媒層內部性質的變化情形--P35 3.2.2質子交換膜的性能變化情 形--P38 3.3以陽極除水法提高質子交換膜燃料電池性能之探討--P38 第四章 結論與建議--P41 參考文獻--P43
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