Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl

The high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb(3))-based skutterudites with nominal compositions Tl(x)K(0.3)Co(4)Sb(12) (x = 0.1 − 0.3) were investigated. The filling fraction of Tl in CoSb(3) was enhanced by co-filling with K,...

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Autores principales: Kurosaki, Ken, Li, Guanghe, Ohishi, Yuji, Muta, Hiroaki, Yamanaka, Shinsuke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4195357/
https://www.ncbi.nlm.nih.gov/pubmed/25353017
http://dx.doi.org/10.3389/fchem.2014.00084
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author Kurosaki, Ken
Li, Guanghe
Ohishi, Yuji
Muta, Hiroaki
Yamanaka, Shinsuke
author_facet Kurosaki, Ken
Li, Guanghe
Ohishi, Yuji
Muta, Hiroaki
Yamanaka, Shinsuke
author_sort Kurosaki, Ken
collection PubMed
description The high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb(3))-based skutterudites with nominal compositions Tl(x)K(0.3)Co(4)Sb(12) (x = 0.1 − 0.3) were investigated. The filling fraction of Tl in CoSb(3) was enhanced by co-filling with K, which resulted in all of the samples showing the filled-skutterudite single phase. Owing to the high filling ratio, the carrier concentration in the sample with x = 0.3 was as high as 4.3 × 10(20) cm(−3) at room temperature. Furthermore, quite low lattice thermal conductivity (as low as 0.9 Wm(−1)K(−1)) was obtained for the sample with x = 0.3, probably because of strong phonon scattering by the Tl and K co-rattling effect, which resulted in a maximum zT of around one at 773 K.
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spelling pubmed-41953572014-10-28 Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl Kurosaki, Ken Li, Guanghe Ohishi, Yuji Muta, Hiroaki Yamanaka, Shinsuke Front Chem Chemistry The high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb(3))-based skutterudites with nominal compositions Tl(x)K(0.3)Co(4)Sb(12) (x = 0.1 − 0.3) were investigated. The filling fraction of Tl in CoSb(3) was enhanced by co-filling with K, which resulted in all of the samples showing the filled-skutterudite single phase. Owing to the high filling ratio, the carrier concentration in the sample with x = 0.3 was as high as 4.3 × 10(20) cm(−3) at room temperature. Furthermore, quite low lattice thermal conductivity (as low as 0.9 Wm(−1)K(−1)) was obtained for the sample with x = 0.3, probably because of strong phonon scattering by the Tl and K co-rattling effect, which resulted in a maximum zT of around one at 773 K. Frontiers Media S.A. 2014-10-13 /pmc/articles/PMC4195357/ /pubmed/25353017 http://dx.doi.org/10.3389/fchem.2014.00084 Text en Copyright © 2014 Kurosaki, Li, Ohishi, Muta and Yamanaka. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Kurosaki, Ken
Li, Guanghe
Ohishi, Yuji
Muta, Hiroaki
Yamanaka, Shinsuke
Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title_full Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title_fullStr Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title_full_unstemmed Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title_short Enhancement of thermoelectric efficiency of CoSb(3)-based skutterudites by double filling with K and Tl
title_sort enhancement of thermoelectric efficiency of cosb(3)-based skutterudites by double filling with k and tl
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4195357/
https://www.ncbi.nlm.nih.gov/pubmed/25353017
http://dx.doi.org/10.3389/fchem.2014.00084
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