質子交換膜燃料電池鋁雙極板製備及表面改質之研究

Study of preparation and surface modification of aluminum bipolar plate for PEM fuel cell

黃承陽(Cheng-Yang Huang)

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(2010年)

摘要

本研究是以無電鍍鎳、金及循環伏安法(cyclic voltammetry)聚合導電高分子聚?咯(Ppy)於1050鋁板上，並將無電鍍鎳、金及聚?咯之鋁板置於質子交換膜燃料電池模擬環境；即0.5M硫酸水溶液中，藉由動態極化實驗及交流阻抗(AC impedance)技術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、金及具聚?咯之鋁板，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?咯之鋁腐蝕電位最高，呈現出最佳的抗腐蝕效果。
另外，本研究應用電腦輔助設計與製造(CAD/CAM)技術研發製造鋁雙極板，並進行鋁雙極板之表面改質。將具有無電鍍鎳、金及聚?咯之鋁雙極板分別與未處理之鋁雙極板組成一直接甲醇燃料電池，分別以動電位極化法及定電流法進行電池性能測試。因此，本研究實驗結果顯示，經表面改質之鋁雙極板未來可以應用於質子交換膜燃料電池之中。

關鍵字

質子交換膜燃料電池 ； 雙極板 ； 腐蝕 ； 無電鍍 ； 聚砒咯

並列摘要

In this study, the corrosion behavior of electroless Ni, Au plating and Polypyrrole coatings using cyclic voltammetry were prepared on 1050 aluminum plate is investigated in a simulated polymer electrolyte membrane fuel cell (PEMFC) environment included 0.5 M 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. Polypyrrole coating with the highest value of corrosion potential in all indicating better corrosion resistance performance, compared to others.
In addition, the computer-aided design and manufacturing (CAD / CAM) technology was employed to develop and produce aluminum bipolar plates. Surface modification was carried out on the aluminum plates. The coated and uncoated bipolar plates were assembled to a direct methanol fuel cell (DMFC) and cell performance testing was conducted by Potentiodynamic polarization and constant current methods. Results showed that the prepared aluminum bipolar plate was suitable for fuel cell applications.

並列關鍵字

PEMFC ； Bipolar plate ； Corrosion ； Electroless plating ； Polypyrrole

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