不鏽鋼雙極板製備及表面改質應用於直接甲醇燃料電池之研究

Preparation and Surface Modification of Stainless Steel Bipolar Plates for Direct Methanol Fuel Cell Application

陳柏潔(Po-Chieh Chen)

指導教授 ： 黃英邦

國立虎尾科技大學/工程學院/材料科學與綠色能源工程研究所/碩士(2012年)

https://doi.org/10.6827/NFU.2012.00133

摘要

本研究是以無電鍍鎳、金、銀及循環伏安法(cyclic voltammetry)聚合導電高分子聚?咯(PPy)於SS 304不鏽鋼，並將無電鍍鎳、金、銀及聚?咯之SS 304不鏽鋼置於直接甲醇燃料電池模擬環境，即0.5M硫酸+10vol.%甲醇水溶液，藉由動態極化實驗及電化學阻抗技術(electrochemical impedance spectroscopy) 探討雙極板在模擬環境中的腐蝕行為。實驗結果顯示，在模擬環境下，經無電鍍鎳、金、銀及具聚?咯之SS 304不鏽鋼，其腐蝕電位有朝貴電位移動及腐蝕電流密度下降之趨勢，其中以具聚?咯之SS 304不鏽鋼具有最高之腐蝕電位而腐蝕電流密度具有相同的次方(order)。另外，本研究應用電腦輔助設計與製造(CAD/CAM)技術研發製造不鏽鋼雙極板，並以循環伏安法聚合聚?咯(PPy)於不鏽鋼雙極板上進行表面改質，將具聚?咯之SS 304雙極板分別與未處理之SS 304不鏽鋼雙極板組成一直接甲醇燃料電池，以定電流法進行電池性能測試，結果顯示：具聚?咯之SS 304雙極板可以有效地提升整體的電池性能。因此，經表面改質之SS 304不鏽鋼雙極板可以應用於直接甲醇燃料電池之中。

關鍵字

直接甲醇燃料電池 ； 腐蝕 ； 無電鍍 ； 雙極板 ； 聚?咯

並列摘要

In this study, the corrosion behavior of electroless Ni, Au, Ag plating and Polypyrrole coatings using cyclic voltammetry were prepared on SS 304 stainless steel is investigated in a simulated direct methanol fuel cell (DMFC) environment included 0.5 M + 10 vol.% methanol solution at room temperature. Potentiodynamic technique and electrochemical impedance spectroscopy (EIS) were performed to determine the corrosion properties of electroless plating and polypyrrole coatings. It was found that corrosion potential of the coated sample at room temperature was shift toward noble potential and corrosion current density decreased. Polypyrrole coating with the highest value of corrosion potential compared to others. In addition, the computer-aided design and manufacturing (CAD / CAM) technology was employed to develop and stainless steel bipolar plates. Surface modification was carried out on the stainless steel plates. The polypyrrole coated and uncoated bipolar plates were assembled to a direct methanol fuel cell (DMFC) and cell performance testing was conducted by constant current methods. Results showed that the polypyrrole coated SS 304 stainless steel bipolar plate was suitable for direct methanol fuel cell applications.

並列關鍵字

DMFC ； Corrosion ； Electroless plating ； Bipolar plate ； Polypyrrole

參考文獻

參考文獻

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