Dispersion of InSb Nanoinclusions in Cu3SbS4 for Improved Stability and Thermoelectric Efficiency

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Original languageEnglish
Article number2300125
Journal / PublicationAdvanced Energy and Sustainability Research
Issue number11
Online published8 Sept 2023
Publication statusPublished - Nov 2023



Thermoelectric-based waste heat recovery requires efficient materials to replace conventional non-eco-friendly Te- and Pb-based commercial devices. Ternary copper chalcogenide-based famatinite (Cu3SbS4) compound is one of the practical substitutes for traditional thermoelectric materials. However, the pristine Cu3SbS4 inherits poor structural complexion, large thermal conductivity, and low power conversion efficiency. To develop high-efficiency Cu3SbS4, InSb nanoinclusions are incorporated via high-energy ball milling followed by the hot-press densification method. Incorporating InSb nanoinclusions to lower thermal conductivity via phonon scattering while increasing the thermopower via a carrier energy filtering process. The thermoelectric performance (ZT) of ≈0.4 at 623 K is obtained in Cu3SbS4-3 mol% InSb nanocomposite, which is ≈140% higher than pure Cu3SbS4. Both mechanical and thermal stability are improved by grain boundary hardening and dispersion strengthening. Thus, a facile nanostructured Cu3SbS4 with added InSb nanoinclusions is delivered as a highly efficient, eco-friendly, structurally-, thermally-, and mechanically-stable material for next-generation thermoelectric generators. © 2023 The Authors. Advanced Energy and Sustainability Research published by Wiley-VCH GmbH.

Research Area(s)

  • Cu3SbS4, InSb, nanoinclusion, thermoelectric

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