Improvement of Metallic Bipolar Plate of Solid Polymer Fuel Cell by Using Cathodic Arc Deposition of Nano-scaled Multilayer Films

陰極電弧沉積奈米級多層膜應用於改善燃料電池金屬雙極板性能之研究

何偉友(Wei-Yu Ho) ； 薛旭宏(Xu-Hong Xue)

《中國機械工程學刊》 28卷4期 (2007/08) Pp. 437-442

https://doi.org/10.29979/JCSME.200708.0010

摘要

本研究利用陰極電弧蒸鍍系統沉積Ti、Cr系奈米厚度之多層膜於不銹鋼基板上，多層膜的結構藉由控制基板轉架之速度而獲得，並分析其不同結構之耐腐蝕性與導電性以改善燃料電池金屬雙極板的功能。控制基板轉架之速度範圍為0.5至4轉／分。由實驗結果知所有的TiN/CrN多層膜於硫酸環境中具有化學穩定性佳並兼具較佳導電之特性。TiN/CrN多層膜在轉速為2轉／分之條件下表現最佳之耐腐蝕性。因此，TiN/CrN多層膜可以考慮進一步應用在燃料電池金屬雙極板，以改善長時間使用之功能。

並列摘要

In this study, various multilayered coatings were deposited on the stainless steel substrates by the cathodic arc deposition technique to enhance the corrosion resistance and electrical conductivity of the specimens which may be used as the metallic bipolar plates of PEMFC. These various multilayered films were obtained by changing the rotation speed of the substrate turntable from 0.5 to 4 rpm. The results showed that all of the TiN/CrN coated samples presented a better corrosion resistance than the bare stainless steel substrate. The multi-layered coatings deposited at the 2 rpm provided the best corrosion resistance of the coated stainless steels when they were subjected to polarization and immersion test in10 Vol.% H2SO4 solution. Additionally, the multi-layered coating exhibited better electrical conductivity as compared to stainless steeel. Thus, the TiN/CrNi multi-layered coating is considered to be a better candidate for PEMFC bipolar plateapplication in this study.

並列關鍵字

Cathodic arc deposition ； Multilayer Films ； Bipolar Plate ； PEMFC