The Electronic Transport Channel Protection and Tuning in Real Space to Boost the Thermoelectric Performance of Mg3+dSb2-yBiy near Room Temperature

Han，Zhijia1,2; Gui，Zhigang3,4; Zhu，Y. B.1; Qin，Peng1; Zhang，Bo Ping2; Zhang，Wenqing3; Huang，Li3; Liu，Weishu1,5

2020-02-28

10.34133/2020/1672051

Research   影响因子和分区

2639-5274

The optimization of thermoelectric materials involves the decoupling of the transport of electrons and phonons. In this work, an increased Mg-Mg distance, together with the carrier conduction network protection, has been shown as an effective strategy to increase the weighted mobility (U = µm) and hence thermoelectric power factor of MgSbBi family near room temperature. Mg3+δSb0.5Bi1.5 has a high carrier mobility of 247 cm2V-1 s-1 and a record power factor of 3470 μWm-1 K-2 at room temperature. Considering both efficiency and power density, Mg3+δSb1.0Bi1.0 with a high average ZT of 1.13 and an average power factor of 3184 μWm-1 K-2 in the temperature range of 50-250°C would be a strong candidate to replace the conventional n-type thermoelectric material BiTeSe. The protection of the transport channel through Mg sublattice means alloying on Sb sublattice has little effect on electron while it significantly reduces phonon thermal conductivity, providing us an approach to decouple electron and phonon transport for better thermoelectric materials.

SCI ; EI

英语

第一

WOS:000526089100001

20203809205810

Thermoelectric power ; Thermoelectric equipment ; Carrier mobility ; Thermal conductivity ; Electric power factor ; Magnesium alloys ; Phonons ; Bismuth alloys

Magnesium and Alloys:542.2 ; Alkaline Earth Metals:549.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Semiconducting Materials:712.1

2-s2.0-85091004972

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,10083,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
4.Southern University of Science and Technology,Academy for Advanced Interdisciplinary Studies,Shenzhen,518055,China
5.Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China

Han，Zhijia,Gui，Zhigang,Zhu，Y. B.,et al. The Electronic Transport Channel Protection and Tuning in Real Space to Boost the Thermoelectric Performance of Mg3+dSb2-yBiy near Room Temperature[J]. Research,2020,2020.

Han，Zhijia.,Gui，Zhigang.,Zhu，Y. B..,Qin，Peng.,Zhang，Bo Ping.,...&Liu，Weishu.(2020).The Electronic Transport Channel Protection and Tuning in Real Space to Boost the Thermoelectric Performance of Mg3+dSb2-yBiy near Room Temperature.Research,2020.

Han，Zhijia,et al."The Electronic Transport Channel Protection and Tuning in Real Space to Boost the Thermoelectric Performance of Mg3+dSb2-yBiy near Room Temperature".Research 2020(2020).