不同表面處理之金屬發泡材於質子交換膜燃料電池內的研究

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姓名

鄭延元(Yen-yuan Cheng) 查詢紙本館藏

畢業系所

機械工程學系在職專班

論文名稱

不同表面處理之金屬發泡材於質子交換膜燃料電池內的研究
(Effects of surface treatment on metal foam for PEM fuel cell application)

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摘要(中)

本研究是採用不同鍍層處理之金屬發泡材取代質子交換膜燃料電池的傳統流道，配合鋁材質的金屬雙極板組裝之單電池，探討各種表面處理的金屬發泡材在不同操作溫度及加濕條件下，其單電池內部因化學反應衍生的腐蝕現象對電池效能輸出的影響。
論文中使用的金屬發泡材為孔隙率95％的成熟產品，利用其多孔材質的良好導電性、高滲透性及較佳的排水特性，來提升電池效能，但因電池內部的酸性環境，易使金屬發泡材產生腐蝕現象，並導致電池效率不如預期，因此，本研究係針對鍍層材料的特性分析，討論鍍層材料改善減緩腐蝕的發生及穩定電池效能。
研究觀察實驗前的PTFE疏水處理，除了提升水管理效率外，也增加了抗腐蝕能力。鍍層的材料如果為易在酸性環境中反應並析出生成物質，則將影響電池性能的表現，藉由長時間測試實驗得知，鍍氮化物的表面處理方式，電池性能在運轉100小時後，整體的表現穩定，為鍍金方式之外，可以考慮的表面處理方法，藉此研究結果，提供未來金屬發泡材燃料電池降低因腐蝕影響電池效能之精進。

摘要(英)

In this study traditional graphite flow field of PEM fuel cell was replaced by metal foam and thin metallic plate. Several surface treatments were employed increase the corrosion resistance of the metal foams. The surface properties, corrosion characterisitics at different temperatures, and their effects on fuel cell performance were investigated.
The metal foam used in this study has a porosity of 0.95 as purchased. It has good electrical conductivity, gas permeability, and water removal ability. However, metal suffers from corrosion in fuel cell environment. Therefore, several surface coatings were used to increase its corrosion resistance.
Results show that, in addition to increasing hydrophobicity, the PTFE treament also helps to increase metal foam’s corrosion resistance. From the results of 100-hr durability test, the cell with nitride coating foams has the best stability. Although its cell performance is slightly lower than the cell with gold plated foams, it is a promising alternative for its stability and lower cost.

關鍵字(中)

★ 表面處理
★ 腐蝕
★ 金屬發泡材
★ 燃料電池

關鍵字(英)

★ surface treatment
★ corrsion
★ metal foam
★ fuel cell

論文目次

中文摘要 i
Abstract ii
致謝 iii
圖目錄 vii
表目錄 ix
第一章緒論 - 1 -
1-1前言 - 1 -
1-2燃料電池運作原理與簡介 - 2 -
1-2-1燃料電池的運作原理 - 2 -
1-2-2 燃料電池的極化現象 - 3 -
1-3研究動機與目的 - 4 -
第二章文獻回顧 - 6 -
2-1金屬發泡材在燃料電池的應用 - 6 -
2-2腐蝕防治在燃料電池的應用 - 8 -
第三章實驗方法與設備 - 13 -
3-1實驗方法 - 13 -
3-2鍍層表面性質分析 - 13 -
3-2-1疏水性測試 - 13 -
3-2-2導電性測試 - 13 -
3-2-3腐蝕電流測試 - 14 -
3-3燃料電池單電池性能測試 - 14 -
3-3-1金屬雙極板 - 14 -
3-3-2金屬發泡材 - 14 -
3-3-3氣密墊圈 - 15 -
3-3-4氣體擴散層與質子交換膜 - 15 -
3-3-5疏水處理簡述 - 15 -
3-3-6燃料電池測試台 - 16 -
3-3-7燃料電池的安裝 - 17 -
3-3-8燃料電池性能測試 - 17 -
第四章實驗結果與討論 - 19 -
4-1不同鍍層金屬發泡材疏水性測試 - 19 -
4-2不同鍍層金屬發泡材導電性測試 - 20 -
4-3不同鍍層金屬發泡材腐蝕電流量測 - 20 -
4-4不同鍍層之金屬發泡材單電池性能測試 - 22 -
4-4-1不同操作溫度對電池性能之影響 - 22 -
4-4-2高加濕條件下，工作溫度對電池性能的影響 - 23 -
4-5不同鍍層之金屬發泡材單電池100小時運轉測試 - 25 -
第五章結論與建議 - 27 -
5-1結論 - 27 -
5-2建議 - 28 -
參考文獻 - 29 -

參考文獻

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指導教授

曾重仁(Chung-Jen Tseng)

審核日期

2013-1-29

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