Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl
The high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb3)-based skutterudites with nominal compositions TlxK0.3Co4Sb12 (x = 0.1–0.3) were investigated. The filling fraction of Tl in CoSb3 was enhanced by co-filling with K, which resulte...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-10-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fchem.2014.00084/full |
| _version_ | 1828320928988135424 |
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| author | Ken eKurosaki Guanghe eLi Yuji eOhishi Hiroaki eMuta Shinsuke eYamanaka Shinsuke eYamanaka |
| author_facet | Ken eKurosaki Guanghe eLi Yuji eOhishi Hiroaki eMuta Shinsuke eYamanaka Shinsuke eYamanaka |
| author_sort | Ken eKurosaki |
| collection | DOAJ |
| description | The high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb3)-based skutterudites with nominal compositions TlxK0.3Co4Sb12 (x = 0.1–0.3) were investigated. The filling fraction of Tl in CoSb3 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 × 1020 cm−3 at room temperature. Furthermore, quite low lattice thermal conductivity (as low as 0.9 W m−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. |
| first_indexed | 2024-04-13T18:18:38Z |
| format | Article |
| id | doaj.art-3d2c874a57e64e76b7f3bd2b7fcdb9d7 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-13T18:18:38Z |
| publishDate | 2014-10-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-3d2c874a57e64e76b7f3bd2b7fcdb9d72022-12-22T02:35:32ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462014-10-01210.3389/fchem.2014.00084112881Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and TlKen eKurosaki0Guanghe eLi1Yuji eOhishi2Hiroaki eMuta3Shinsuke eYamanaka4Shinsuke eYamanaka5Osaka UniversityOsaka UniversityOsaka UniversityOsaka UniversityOsaka UniversityUniversity of FukuiThe high-temperature thermoelectric properties of thallium (Tl) and potassium (K) double-filled cobalt antimonide (CoSb3)-based skutterudites with nominal compositions TlxK0.3Co4Sb12 (x = 0.1–0.3) were investigated. The filling fraction of Tl in CoSb3 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 × 1020 cm−3 at room temperature. Furthermore, quite low lattice thermal conductivity (as low as 0.9 W m−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.http://journal.frontiersin.org/Journal/10.3389/fchem.2014.00084/fullPotassiumThalliumThermoelectric materialsThermal Conductivityfilled skutteruditether |
| spellingShingle | Ken eKurosaki Guanghe eLi Yuji eOhishi Hiroaki eMuta Shinsuke eYamanaka Shinsuke eYamanaka Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl Frontiers in Chemistry Potassium Thallium Thermoelectric materials Thermal Conductivity filled skutterudite ther |
| title | Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl |
| title_full | Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl |
| title_fullStr | Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl |
| title_full_unstemmed | Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl |
| title_short | Enhancement of thermoelectric efficiency of CoSb3-based skutterudites by double filling with K and Tl |
| title_sort | enhancement of thermoelectric efficiency of cosb3 based skutterudites by double filling with k and tl |
| topic | Potassium Thallium Thermoelectric materials Thermal Conductivity filled skutterudite ther |
| url | http://journal.frontiersin.org/Journal/10.3389/fchem.2014.00084/full |
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