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Materials 2016, 9(4), 257; doi:10.3390/ma9040257

High Pressure Synthesis of p-Type CeyFe4−xCoxSb12 Skutterudites

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China
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Academic Editor: Christof Schneider
Received: 18 February 2016 / Revised: 17 March 2016 / Accepted: 28 March 2016 / Published: 31 March 2016
(This article belongs to the Section Energy Materials)
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Abstract

Co-substituted p-Type CeFe4−xCoxSb12 skutterudites were successfully synthesized with a high pressure synthesis method. The structure, composition, and thermoelectric properties were investigated. The obtained CeyFe4−xCoxSb12 samples show the skutterudite structure of I m 3 ¯ symmetry. The hole concentration decreases with elevating Co substitution level, leading to increased Seebeck coefficient and electrical resistivity. Meanwhile, the filling fraction of Ce decreases, which is unfavorable for reducing the lattice thermal conductivity. As a result, the thermoelectric performance of CeyFe4−xCoxSb12 deteriorates with higher Co content. The maximal ZT of 0.91 was achieved at 763 K for the optimal Ce0.92Fe4Sb12 sample. View Full-Text
Keywords: skutterudites; high pressure synthesis; thermoelectric properties; filling fraction; substitution skutterudites; high pressure synthesis; thermoelectric properties; filling fraction; substitution
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Liu, Y.; Li, X.; Zhang, Q.; Zhang, L.; Yu, D.; Xu, B.; Tian, Y. High Pressure Synthesis of p-Type CeyFe4−xCoxSb12 Skutterudites. Materials 2016, 9, 257.

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