Abstract
This chapter presents the definition, functions, and requirements of the interconnect materials for intermediate temperature solid oxide fuel cells (IT-SOFCs), including several interconnect materials for SOFCs. In the past, the most promising candidates have been LaCrO3- and YCrO3-based perovskite materials. Recently, metal-based materials and modified or coated alloys have also attracted attention. However, different interconnect materials are suitable for SOFCs with different temperature ranges. For high-temperature SOFCs, only limited types of perovskite-based oxides are applicable as interconnects. With the decrease in operation temperature to the intermediate range, i.e., 500–800 °C, metal-based interconnects can be used, thus making the SOFCs more versatile in stack construction. In this chapter, we focus on the development of LaCrO3 and YCrO3 perovskite-based interconnects and various metal-based interconnects primarily based on Cr, Ni, and Fe. Recently, several coating systems, such as spinel coating and perovskite coating, have been adopted for metal-based interconnects to reduce chromium volatilization and maintain a low electrical resistance, which might provide a new approach to designing and developing stable interconnects with low resistance. This chapter aims to provide useful guidelines for future research on interconnect materials for IT-SOFCs.
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Shao, Z., Tadé, M.O. (2016). Interconnect Materials for IT-SOFCs. In: Intermediate-Temperature Solid Oxide Fuel Cells. Green Chemistry and Sustainable Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-52936-2_5
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