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http://dx.doi.org/10.5012/bkcs.2012.33.4.1177

Electrochemical Properties of NiO-YSZ Thin Films on 316 Stainless Steel Bipolar Plates Under a Simulated PEMFC Environment  

Lee, W.G. (Department of Materials Science and Engineering, Korea University)
Jang, H. (Department of Materials Science and Engineering, Korea University)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.4, 2012 , pp. 1177-1182 More about this Journal
Abstract
The corrosion resistance of 316L stainless steel coated with NiO-YSZ (Ni added yttria stabilized zirconia) was examined in a proton exchange membrane fuel cell (PEMFC) environment. The NiO-YSZ coating was carried out using a sol-gel dip coating method, and the corrosion resistance and interfacial contact resistance (ICR) were determined by the composition and morphology of the NiO-YSZ film. The corrosion resistance increased with increasing Ni content in the NiO-YSZ film, but rapid corrosion was observed when the YSZ film contained more than 15 wt % Ni due to surface cracks. The polarization resistance was improved by several orders of magnitude when 316L stainless steel was coated with a 15 wt % NiO-YSZ film compared to bare 316L. The ICR of the NiO-YSZ film was decreased to that of bare 316L when the YSZ film contained 25 wt % NiO, suggesting the possible application of NiO-YSZ coated stainless steel for a bipolar plate.
Keywords
Ni; YSZ; Sol-gel; Metallic bipolar plate; PEMFC;
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