Fast ion transport for synthesis and stabilization of β-Zn4Sb3

Dongwang Yang, Xianli Su, Jian He (), Yonggao Yan, Jun Li, Hui Bai, Tingting Luo, Yamei Liu, Hao Luo, Yimeng Yu, Jinsong Wu (), Qingjie Zhang, Ctirad Uher and Xinfeng Tang ()
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Dongwang Yang: Wuhan University of Technology
Xianli Su: Wuhan University of Technology
Jian He: Clemson University
Yonggao Yan: Wuhan University of Technology
Jun Li: Wuhan University of Technology
Hui Bai: Wuhan University of Technology
Tingting Luo: Wuhan University of Technology
Yamei Liu: Clemson University
Hao Luo: Wuhan University of Technology
Yimeng Yu: Wuhan University of Technology
Jinsong Wu: Wuhan University of Technology
Qingjie Zhang: Wuhan University of Technology
Ctirad Uher: University of Michigan
Xinfeng Tang: Wuhan University of Technology

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Mobile ion-enabled phenomena make β-Zn4Sb3 a promising material in terms of the re-entry phase instability behavior, mixed electronic ionic conduction, and thermoelectric performance. Here, we utilize the fast Zn2+ migration under a sawtooth waveform electric field and a dynamical growth of 3-dimensional ionic conduction network to achieve ultra-fast synthesis of β-Zn4Sb3. Moreover, the interplay between the mobile ions, electric field, and temperature field gives rise to exquisite core-shell crystalline-amorphous microstructures that self-adaptively stabilize β-Zn4Sb3. Doping Cd or Ge on the Zn site as steric hindrance further stabilizes β-Zn4Sb3 by restricting long-range Zn2+ migration and extends the operation temperature range of high thermoelectric performance. These results provide insight into the development of mixed-conduction thermoelectric materials, batteries, and other functional materials.

Date: 2021
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DOI: 10.1038/s41467-021-26265-0

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