Solid-State Janus Nanoprecipitation Enables Amorphous-Like Heat Conduction in Crystalline Mg3Sb2-Based Thermoelectric Materials

Shu, Rui1,2; Han, Zhijia1; Elsukova, Anna2; Zhu, Yongbin1; Qin, Peng1; Jiang, Feng1; Lu, Jun2; Persson, Per O. A.2; Palisaitis, Justinas2; le Febvrier, Arnaud2; Zhang, Wenqing3; Cojocaru-Miredin, Oana4; Yu, Yuan4; Eklund, Per2; Liu, Weishu1,5

2022-07-01

10.1002/advs.202202594

ADVANCED SCIENCE   Impact Factor & Quartile

2198-3844

Solid-state precipitation can be used to tailor material properties, ranging from ferromagnets and catalysts to mechanical strengthening and energy storage. Thermoelectric properties can be modified by precipitation to enhance phonon scattering while retaining charge-carrier transmission. Here, unconventional Janus-type nanoprecipitates are uncovered in Mg3Sb1.5Bi0.5 formed by side-by-side Bi- and Ge-rich appendages, in contrast to separate nanoprecipitate formation. These Janus nanoprecipitates result from local comelting of Bi and Ge during sintering, enabling an amorphous-like lattice thermal conductivity. A precipitate size effect on phonon scattering is observed due to the balance between alloy-disorder and nanoprecipitate scattering. The thermoelectric figure-of-merit ZT reaches 0.6 near room temperature and 1.6 at 773 K. The Janus nanoprecipitation can be introduced into other materials and may act as a general property-tailoring mechanism.

atom probe tomography Janus nanoprecipitation low thermal conductivity Mg3Sb2 thermalelectrics

SCI ; EI

English

First ; Corresponding

National Key Research and Development Program of China[2018YFB0703600] ; National Natural Science Foundation of China[51872133] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province[2021B1212040001] ; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU)[2009 00971] ; Knut and Alice Wallenberg foundation through the Wallenberg Academy Fellows program[KAW-2020.0196] ; Swedish Foundation for Strategic Research (SSF)[RIF 14-0074] ; German Science Foundation (DFG)[SFB 917]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000826658200001

WILEY

20223112455398

Antimony compounds ; Heat conduction ; Magnesium compounds ; Phonon scattering ; Phonons ; Precipitation (chemical) ; Thermal conductivity ; Thermoelectric equipment ; Thermoelectricity

Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Heat Transfer:641.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Chemical Operations:802.3

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Linkoping Univ, Dept Phys Chem & Biol IFM, Thin Film Phys Div, SE-58183 Linkoping, Sweden
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Rhein Westfal TH Aachen, Phys Inst IA 1, Sommerfeldstr 14, D-52074 Aachen, Germany
5.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China

Shu, Rui,Han, Zhijia,Elsukova, Anna,et al. Solid-State Janus Nanoprecipitation Enables Amorphous-Like Heat Conduction in Crystalline Mg3Sb2-Based Thermoelectric Materials[J]. ADVANCED SCIENCE,2022,9.

Shu, Rui.,Han, Zhijia.,Elsukova, Anna.,Zhu, Yongbin.,Qin, Peng.,...&Liu, Weishu.(2022).Solid-State Janus Nanoprecipitation Enables Amorphous-Like Heat Conduction in Crystalline Mg3Sb2-Based Thermoelectric Materials.ADVANCED SCIENCE,9.

Shu, Rui,et al."Solid-State Janus Nanoprecipitation Enables Amorphous-Like Heat Conduction in Crystalline Mg3Sb2-Based Thermoelectric Materials".ADVANCED SCIENCE 9(2022).