質子交換膜燃料電池（PEMFC）具有高效率、低碳排放、快速啟動及模組化等特性，已逐漸成為全球潔淨能源技術的重要發展方向。然而，其性能與材料選擇密切相關，其中雙極板作為燃料電池的核心組件之一，其材料特性對於燃料電池整體性能具有顯著影響。目前常見的雙極板材料如石墨和不銹鋼，分別存在脆性及腐蝕性問題，限制其實際應用範圍。鈦金屬由於具備高強度、優良導電性及卓越耐腐蝕性能，近年逐漸受到研究人員的青睞，特別是在表面進行鍍膜處理後，性能更為突出。
本研究以鈦金屬雙極板為研究對象，選用純鈦材料，並在其表面鍍覆氮化鈦（TiN）膜，以評估其在質子交換膜燃料電池中之性能表現。實驗方法包括組裝未鍍膜純鈦雙極板電堆與TiN鍍膜純鈦雙極板電堆，並在相同條件下進行比較分析。實驗結果發現，經TiN鍍膜處理之鈦金屬雙極板具有更優異的電化學性能。經量化計算，鍍膜電堆的峰值功率輸出較未鍍膜電堆提高了約50%，證明TiN膜確實可有效降低電極間的接觸電阻。
為進一步提升電堆性能，本研究亦探討組裝扭力對於電堆性能的影響。透過多次實驗驗證，發現組裝扭力值設定為22.5 kgf-cm時，能達到最佳之整體性能與穩定性表現，此最佳扭力值對於電堆性能與長期運作穩定性均具重要意義。此外，本研究透過加速耐久性測試（Accelerated Stress Testing, AST），進一步驗證鍍膜技術對於提升電堆耐用性之實際效果。AST結果顯示，鍍膜電堆在長時間操作下具有較佳的抗腐蝕能力，有效延長了整體使用壽命。
本論文聚焦於鈦金屬雙極板在質子交換膜燃料電池（PEMFC）中的性能分析，特別探討純鈦材料與其表面鍍氮化鈦（TiN）膜對電池電化學性能、耐久性的影響，旨在提升PEMFC整體效能與壽命，促進其商業化應用。透過實際實驗數據進行量化性能比較，證明鈦金屬搭配TiN鍍膜處理與最佳扭力值的設定，能夠有效提升PEMFC之性能表現，提供了燃料電池材料選擇與製程參數優化的重要參考依據，具有廣闊的未來應用前景。

Proton Exchange Membrane Fuel Cells (PEMFC) feature high efficiency, low carbon emissions, rapid start-up capability, and modularity, making them increasingly important in the global clean energy technology landscape. The performance of PEMFC is closely related to material selection, with bipolar plates being one of the critical components significantly influencing overall fuel cell performance. Currently, commonly used bipolar plate materials such as graphite and stainless steel face issues like brittleness and corrosion, limiting their practical application. Titanium, however, has recently gained attention from researchers due to its high strength, excellent conductivity, and superior corrosion resistance, especially when enhanced with surface coating treatments.
This study focuses on titanium bipolar plates, employing pure titanium material coated with titanium nitride (TiN) to evaluate its performance in PEMFC applications. The experimental methodology involved assembling fuel cell stacks using both untreated pure titanium bipolar plates and TiN-coated bipolar plates, conducting comparative analyses under identical conditions. Results demonstrated that TiN-coated titanium bipolar plates exhibited significantly improved electrochemical performance. Quantitative analysis showed that the peak power output of the coated stack increased by approximately 50% compared to the uncoated stack, confirming the effectiveness of the TiN coating in reducing contact resistance between electrodes.
To further enhance fuel cell stack performance, the impact of assembly torque was also examined in this study. Multiple experiments indicated that an assembly torque value of 22.5 kgf-cm yielded the optimal overall performance and stability, highlighting the critical role of torque settings in long-term operational stability. Moreover, this research employed Accelerated Stress Testing (AST) to further validate the practical effectiveness of the coating technology in enhancing durability. AST results revealed that the coated stacks exhibited superior corrosion resistance during extended operations, effectively prolonging the overall service life.
This thesis centers on the performance analysis of titanium bipolar plates in Proton Exchange Membrane Fuel Cells (PEMFC), specifically investigating the effects of pure titanium material and its surface coating with titanium nitride (TiN) on the electrochemical performance and durability of the fuel cells. The goal is to improve the overall performance and lifespan of PEMFCs, thereby promoting their commercial application. By quantitatively comparing practical experimental data, this study confirms that combining titanium with TiN coating and optimal torque settings can significantly enhance PEMFC performance. These findings provide essential reference data for the selection of fuel cell materials and optimization of manufacturing process parameters, presenting extensive potential for future applications.

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