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- Title
Fast ion transport for synthesis and stabilization of β-Zn<sub>4</sub>Sb<sub>3</sub>.
- Authors
Yang, Dongwang; Su, Xianli; He, Jian; Yan, Yonggao; Li, Jun; Bai, Hui; Luo, Tingting; Liu, Yamei; Luo, Hao; Yu, Yimeng; Wu, Jinsong; Zhang, Qingjie; Uher, Ctirad; Tang, Xinfeng
- 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. β-Zn4Sb3 has promising thermoelectric performance, but its ionic migration properties make it prone to degradation. Here the authors exploit the ion migration in an electric field-assisted synthesis method, fast producing β-Zn4Sb3 with improved phase stability and extended temperature range for the thermoelectric operation.
- Subjects
FAST ions; ELECTRIC fields; STERIC hindrance; ION migration &; velocity; THERMOELECTRIC materials
- Publication
Nature Communications, 2021, Vol 12, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-021-26265-0