Improving the Oxidation Resistance of Fe-Cr-Mn Interconnector of Solid Oxide Electrolyte Fuel Cell with the Addition of Trace Elements

Abstract:

Fe-Cr-Mn alloy is a common material used for the metallic interconnector of solid oxide electrolyte fuel cells (SOFC). However, its high temperature oxidation resistance needs to be strengthened to improve the performance of SOFC. In this study, the effect of trace additions of Ti, Mo, Co and La on the high-temperature behavior of Fe-Cr-Mn alloy was investigated. The composition of Fe-22Cr-2Mn-X (X = Ti, Mo, Co, La) alloys was designed to maintain a bcc structure with the aid of the thermal-calc software. These alloys tended to form Cr-rich oxide in the inner layer and Mn-rich oxide in the outer layer of the specimens after oxidative tests at 850°C, thus reducing the likelihood of chromium oxide evaporation. The experimental results indicated that the addition of Co and La produced better oxidation resistance at high temperatures than Ti and Mo. In addition, the influence of trace elements on electrical resistance of the interconnector material was examined as well.

• Periodical: Advances in Science and Technology (Volume 72)
• Pages: 243-248
• DOI: https://doi.org/10.4028/www.scientific.net/AST.72.243
• Online since: October 2010
• Authors: W.S. Wang, Shuang Shii Lian, C. Chen, K.C. Tsai, W.J. Shong, R.Y. Lee
• Keywords: Fe-22Cr-2Mn-X Alloy, Oxidation Resistance, SOFC Interconnector

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