In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe
Abstract Lead‐free chalcogenide SnTe has been demonstrated to be an efficient medium temperature thermoelectric (TE) material. However, high intrinsic Sn vacancies as well as high thermal conductivity devalue its performance. Here, β‐Zn4Sb3 is incorporated into the SnTe matrix to regulate the thermo...
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.201903493 |
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doaj-1b5d165831fe4c32bc499eb3f9470fd02020-11-25T02:51:58ZengWileyAdvanced Science2198-38442020-06-01711n/an/a10.1002/advs.201903493In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTeSihui Li0Jiwu Xin1Abdul Basit2Qiang Long3Suwei Li4Qinghui Jiang5Yubo Luo6Junyou Yang7State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaState Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 P. R. ChinaAbstract Lead‐free chalcogenide SnTe has been demonstrated to be an efficient medium temperature thermoelectric (TE) material. However, high intrinsic Sn vacancies as well as high thermal conductivity devalue its performance. Here, β‐Zn4Sb3 is incorporated into the SnTe matrix to regulate the thermoelectric performance of SnTe. Sequential in situ reactions take place between the β‐Zn4Sb3 additive and SnTe matrix, and an interesting “core–shell” microstructure (Sb@ZnTe) is obtained; the composition of SnTe matrix is also tuned and thus Sn vacancies are compensated effectively. Benefitting from the synergistic effect of the in situ reactions, an ultralow κlat ≈0.48 W m−1 K−1 at 873 K is obtained and the carrier concentrations and electrical properties are also improved successfully. Finally, a maximum ZT ≈1.32, which increases by ≈220% over the pristine SnTe, is achieved in the SnTe‐1.5% β‐Zn4Sb3 sample at 873 K. This work provides a new strategy to regulate the TE performance of SnTe and also offers a new insight to other related thermoelectric materials.https://doi.org/10.1002/advs.201903493β‐Zn4Sb3core–shell structuresin situ decomposition reactionSnTe thermoelectric materialstin telluride |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Sihui Li Jiwu Xin Abdul Basit Qiang Long Suwei Li Qinghui Jiang Yubo Luo Junyou Yang |
| spellingShingle |
Sihui Li Jiwu Xin Abdul Basit Qiang Long Suwei Li Qinghui Jiang Yubo Luo Junyou Yang In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe Advanced Science β‐Zn4Sb3 core–shell structures in situ decomposition reaction SnTe thermoelectric materials tin telluride |
| author_facet |
Sihui Li Jiwu Xin Abdul Basit Qiang Long Suwei Li Qinghui Jiang Yubo Luo Junyou Yang |
| author_sort |
Sihui Li |
| title |
In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe |
| title_short |
In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe |
| title_full |
In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe |
| title_fullStr |
In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe |
| title_full_unstemmed |
In Situ Reaction Induced Core–Shell Structure to Ultralow κlat and High Thermoelectric Performance of SnTe |
| title_sort |
in situ reaction induced core–shell structure to ultralow κlat and high thermoelectric performance of snte |
| publisher |
Wiley |
| series |
Advanced Science |
| issn |
2198-3844 |
| publishDate |
2020-06-01 |
| description |
Abstract Lead‐free chalcogenide SnTe has been demonstrated to be an efficient medium temperature thermoelectric (TE) material. However, high intrinsic Sn vacancies as well as high thermal conductivity devalue its performance. Here, β‐Zn4Sb3 is incorporated into the SnTe matrix to regulate the thermoelectric performance of SnTe. Sequential in situ reactions take place between the β‐Zn4Sb3 additive and SnTe matrix, and an interesting “core–shell” microstructure (Sb@ZnTe) is obtained; the composition of SnTe matrix is also tuned and thus Sn vacancies are compensated effectively. Benefitting from the synergistic effect of the in situ reactions, an ultralow κlat ≈0.48 W m−1 K−1 at 873 K is obtained and the carrier concentrations and electrical properties are also improved successfully. Finally, a maximum ZT ≈1.32, which increases by ≈220% over the pristine SnTe, is achieved in the SnTe‐1.5% β‐Zn4Sb3 sample at 873 K. This work provides a new strategy to regulate the TE performance of SnTe and also offers a new insight to other related thermoelectric materials. |
| topic |
β‐Zn4Sb3 core–shell structures in situ decomposition reaction SnTe thermoelectric materials tin telluride |
| url |
https://doi.org/10.1002/advs.201903493 |
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