Influence of SnSe on thermoelectric properties of TiS2-xSnSe composites via liquid-assisted shear exfoliation

Kaikai Song, Yang Wang, Peng'an Zong, Changchun Chen, Lin Pan, Shengping He, Yifeng Wang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this study, the thermoelectric properties of TiS2-xmol%SnSe (x = 0, 0.5, 1 and 2) composites prepared with liquid-assisted shear exfoliation (LASE) process were investigated. Results show that the carrier mobility of composites can be improved owing to the enhanced texturing degree via LASE process, and the carrier concentration can be increased together with SnSe addition due to charge transfer. Therefore, high power factors optimally to ~16.4 μW cm−1 K−2 can be obtained, which is almost 67% and 40% higher than that of the pristine and the LASE TiS2, respectively. Unexpectedly, lattice thermal conductivity was increased probably due to the enhanced heterophase electrostatic force between TiS2 and SnSe phase induced by charge transfer. As a result of compromise, a modest ZT maximum of ~0.48 at 673 K was obtained for TiS2-1 mol%SnSe.

Original languageEnglish
Article number164914
JournalJournal of Alloys and Compounds
Volume910
DOIs
StatePublished - 25 Jul 2022

Keywords

  • Charge transfer
  • Composites
  • Liquid-shear exfoliation
  • SnSe
  • Texturing
  • Thermoelectric
  • TiS

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