質子交換膜燃料電池不鏽鋼雙極板無電鍍及電化學法改質之研究

Study of electroless and electrochemical coatings for the corrosion protection of stainless steel bipolar plates for the PEM fuel cell

林昶樺(Chang-Hua Lin)

指導教授 ： 楊立中

共同指導教授 ： 黃英邦(Ing-Bang Huang)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2009年)

摘要

本研究是以SS 316不鏽鋼為基材利用無電鍍鎳、金、銀及電化學循環伏安法(cyclic voltammetry)聚合導電高分子聚?咯(Ppy)於基材表面兩種方式製作質子交換膜燃料電池(PEMFC)之金屬雙極板，並分別探討在室溫及70℃質子交換膜燃料電池模擬環境下之腐蝕行為。本研究主要目的是為提供質子交換膜燃料電池金屬雙極板研發的重要資料，以及更深入了解無電鍍層及聚?咯層兩者之電化學腐蝕特性。
將無電鍍鎳、金、銀及聚?咯之SS 316不鏽鋼；以硫酸作為質子交換膜燃料電池雙極板的模擬環境，藉由動態極化實驗探討其腐蝕行為。實驗結果顯示，在室溫模擬環境下，經無電鍍鎳、金、銀及聚?咯之SS 316不鏽鋼，其腐蝕電位有朝貴電位移動之趨勢，其中以具聚?咯之SS 316不鏽鋼腐蝕電位最高呈現出最佳的抗腐蝕效果。在70℃模擬環境下，除了無電鍍銀及具聚?咯之SS 316不鏽鋼其腐蝕電位有朝貴電位移動之趨勢外，具無電鍍鎳及金之SS 316不鏽鋼並無此現象，其中以無電鍍銀腐蝕電位最高呈現出最佳的抗腐蝕效果。
本研究提出在室溫環境及工作溫度(70℃)下，具聚?咯之SS 316不鏽鋼皆具較佳抗腐蝕特性，可應用於質子交換膜燃料電池雙極板上。

關鍵字

質子交換膜燃料電池 ； 雙極板 ； 腐蝕 ； 無電鍍 ； 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 316 stainless steel is investigated in a simulated polymer electrolyte membrane fuel cell (PEMFC) environment included 0.5 M at room temperature and 70℃. The main purposes are to offer fundamental information for the development of metal bipolar plates in PEMFC, and to obtain a deeper understanding of the electrochemical corrosion characteristics for electroless plating systems and the polypyrrole by electrochemical polymerization.
Potentiodynamic tests 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. However, only the corrosion potential of electroless Ag plating and Polypyrrole coatings have the tendency that corrosion potential was shift toward noble potential at 70℃. Electroless Ag plating with the highest value of corrosion potential in all indicating better corrosion resistance performance, compared to others.
This study addresses the corrosion resistance characteristics of polypyrrole coating on SS 316 stainless steel for PEMFC bipolar plate applications at room temperature environment. However, electroless Ag plating on SS 316 stainless steel for PEMFC bipolar plate applications at 70℃.

並列關鍵字

PEMFC ； Bipolar plate ； Corrosion ； Electroless plating ； Polypyrrole

參考文獻

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[3] 衣寶廉，「燃料電池-原理與應用」P.16~30，五南圖書出版公司出版。

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