Abstract
Fe-substituted CoSb3 skutterudites were successfully synthesized with high pressure synthesis method. The composition, structure, and thermoelectric properties were investigated. Co4−x Fe x Sb12 samples have the skutterudite structure of \(\text{Im} \bar{3}\) symmetry. The hole concentration increases with elevating Fe substitution level. Compared with those ambient-pressure synthesized Fe-substituted CoSb3 samples, our samples exhibit enhanced power factor and suppressed thermal conductivity which benefitted from high pressure. The optimal Co3.2Fe0.8Sb12 shows a peak ZT of 0.53 at 823 K, the highest value for Co-rich p-type skutterudites with single-element substitution. Current study on Co4−x Fe x Sb12 provides a basis for further thermoelectric performance enhancement of Co-rich p-type skutterudites.
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Acknowledgments
This work was supported by the National Science Foundation of China (51525205, 51421091, 51332005, 51201149, and 51121061), and the Natural Science Foundation for Distinguished Young Scholars of Hebei Province of China (E2014203150).
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Liu, Y., Li, X., Zhang, Q. et al. High pressure synthesis of p-type Fe-substituted CoSb3 skutterudites. J Mater Sci: Mater Electron 27, 6433–6437 (2016). https://doi.org/10.1007/s10854-016-4582-6
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DOI: https://doi.org/10.1007/s10854-016-4582-6