Journal ArticleDOI
High temperature transport properties of partially filled CaxCo4Sb12 skutterudites
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TLDR
In this article, the temperature dependences of the electrical resistivity, Seebeck coefficient, and thermal conductivity have been measured on these compounds in the 300-800 K temperature range and they identified Ca as being a true n-type filler atom and offer, for this family of skutterudite, several valuable insights into the potential of Ca to provide good thermoelectric performance.Abstract:
Partially filled CoSb3 skutterudite compounds are emerging materials for thermoelectric energy conversion at high temperature. CaxCo4Sb12 with different Ca contents has been prepared by the conventional metallurgical route. The temperature dependences of the electrical resistivity, Seebeck coefficient, and thermal conductivity have been measured on these compounds in the 300–800 K temperature range. These measurements have identified Ca as being a true n-type filler atom and offer, for this family of skutterudite, several valuable insights into the potential of Ca to provide good thermoelectric performance.read more
Citations
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Journal ArticleDOI
New and Old Concepts in Thermoelectric Materials
TL;DR: The most promising bulk materials with emphasis on results from the last decade are described and the new opportunities for enhanced performance bulk nanostructured composite materials are examined and a look into the not so distant future is attempted.
Journal ArticleDOI
Multiple-filled skutterudites: high thermoelectric figure of merit through separately optimizing electrical and thermal transports.
Xun Shi,Xun Shi,Jiong Yang,James R. Salvador,Miaofang Chi,Jung Y. Cho,Hsin Wang,Shengqiang Bai,Jihui Yang,Wenqing Zhang,Lidong Chen +10 more
TL;DR: The results firmly show that high power factors can be realized by adjusting the total filling fraction of fillers with different charge states to reach the optimum carrier density, and lattice thermal conductivity can also be significantly reduced, to values near the glass limit of these materials.
Journal ArticleDOI
Enhancement of Thermoelectric Figure-of-Merit by a Bulk Nanostructuring Approach
TL;DR: In this paper, the synthesis process and the relationship between the microstructures and the thermoelectric properties of the nanostructured bulk materials with an enhanced ZT value are reviewed.
Journal ArticleDOI
Recent developments in bulk thermoelectric materials
TL;DR: In this article, the authors look at various classes of materials to understand their behavior and determine methods to modify or tune them to optimize their thermoelectric properties, such as the use of rattlers in cage structures such as skutterudites, or mixed-lattice atoms such as complex half-Heusler alloys.
Journal ArticleDOI
Low thermal conductivity and high thermoelectric figure of merit in n-type BaxYbyCo4Sb12 double-filled skutterudites
Xun Shi,H. Kong,Chen Li,Ctirad Uher,Jihui Yang,James R. Salvador,Hong Wang,Lidong Chen,Wenqing Zhang +8 more
TL;DR: In this paper, the combination of Ba and Yb fillers inside the voids of the skutterudite structure provides a broad range of resonant phonon scattering and consequently a strong suppression in the lattice thermal conductivity.
References
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Journal ArticleDOI
SKUTTERUDITES : A phonon-glass-electron crystal approach to advanced thermoelectric energy conversion applications
TL;DR: In this paper, the authors proposed a method to compare one potential thermoelectric material with another, based on a numerical expression that is commonly used to compare the performance or efficiency of a particular device made from a material.
Journal ArticleDOI
Properties of single crystalline semiconducting CoSb3
TL;DR: In this article, the thermoelectric properties of the skutterudite compound CoSb3 were investigated on single crystals grown by the Bridgman gradient freeze technique and the results of the transport property measurements are discussed and are in agreement with some recent predictions based on band structure calculations.
Journal ArticleDOI
Effect of partial void filling on the lattice thermal conductivity of skutterudites
TL;DR: Seebeck et al. as discussed by the authors measured the impact of partial void filling on the lattice thermal conductivity of polycrystalline antimonides with the skutterudite crystal structure with La partially filling the voids.
Journal ArticleDOI
High figure of merit in partially filled ytterbium skutterudite materials
TL;DR: In this article, a polycrystalline skutterudite partially filled with ytterbium ions was shown to have a relatively high dimensionless figure of merit (ZT) in the presence of Yb atoms.
Journal ArticleDOI
Anomalous barium filling fraction and n-type thermoelectric performance of BayCo4Sb12
Linghan Chen,T. Kawahara,Xinfeng Tang,Takashi Goto,Toshio Hirai,Jeffrey S. Dyck,Wei Chen,Ctirad Uher +7 more
TL;DR: In this article, the lattice parameters increase linearly with Ba content, and the electrical conductivity increases with increasing the Ba filling fraction, reaching a maximum value of 1.1 for Ba0.24Co4Sb12 at 850 K.