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The Effect of Reactive Electric Field-Assisted Sintering of MoS2/Bi2Te3 Heterostructure on the Phase Integrity of Bi2Te3 Matrix and the Thermoelectric Properties.

ABSTRACT: In this work, a series of Bi2Te3/X mol% MoS2 (X = 0, 25, 50, 75) bulk nanocomposites were prepared by hydrothermal reaction followed by reactive spark plasma sintering (SPS). X-ray diffraction analysis (XRD) indicates that the native nanopowders, comprising of Bi2Te3/MoS2 heterostructure, are highly reactive during the electric field-assisted sintering by SPS. The nano-sized MoS2 particles react with the Bi2Te3 plates matrix forming a mixed-anion compound, Bi2Te2S, at the interface between the nanoplates. The transport properties characterizations revealed a significant influence of the nanocomposite structure formation on the native electrical conductivity, Seebeck coefficient, and thermal conductivity of the initial Bi2Te3 matrix. As a result, enhanced ZT values have been obtained in Bi2Te3/25 mol% MoS2 over the temperature range of 300-475 K induced mainly by a significant increase in the electrical conductivity.

SUBMITTER: Wang Y 

PROVIDER: S-EPMC8746225 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature

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The Effect of Reactive Electric Field-Assisted Sintering of MoS<sub>2</sub>/Bi<sub>2</sub>Te<sub>3</sub> Heterostructure on the Phase Integrity of Bi<sub>2</sub>Te<sub>3</sub> Matrix and the Thermoelectric Properties.

Wang Yanan Y   Bourgès Cédric C   Rajamathi Ralph R   Nethravathi C C   Rajamathi Michael M   Mori Takao T  

Materials (Basel, Switzerland) 20211222 1

In this work, a series of Bi<sub>2</sub>Te<sub>3</sub>/X mol% MoS<sub>2</sub> (X = 0, 25, 50, 75) bulk nanocomposites were prepared by hydrothermal reaction followed by reactive spark plasma sintering (SPS). X-ray diffraction analysis (XRD) indicates that the native nanopowders, comprising of Bi<sub>2</sub>Te<sub>3</sub>/MoS<sub>2</sub> heterostructure, are highly reactive during the electric field-assisted sintering by SPS. The nano-sized MoS<sub>2</sub> particles react with the Bi<sub>2</sub>T  ...[more]

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