Enhanced Thermoelectric Properties in Cubic Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub> via MWCNTs Incorporation

Enhanced Thermoelectric Properties in Cubic Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub> via MWCNTs Incorporation

Cubic-phase SnSe possesses exceptional crystal structure symmetry while maintaining non-harmonic bond characteristics and ultra-low lattice thermal conductivity, exhibiting superior thermoelectric (TE) application potential compared to its orthorhombic counterpart. Despite recent advancements, syste...

Full description

Saved in:
Bibliographic Details
Main Authors: Zhewen Tan, Zhaowei Zeng, Junliang Zhu, Wenying Wang, Lin Bo, Xingshuo Liu, Changcun Li, Degang Zhao
Format: Article
Language:English
Published: MDPI AG 2025-04-01
Series:Crystals
Subjects:
cubic Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub>
thermoelectric composite
multi-walled carbon nanotubes
thermal conductivity
<i>ZT</i> value
Online Access:https://www.mdpi.com/2073-4352/15/4/365
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Cubic-phase SnSe possesses exceptional crystal structure symmetry while maintaining non-harmonic bond characteristics and ultra-low lattice thermal conductivity, exhibiting superior thermoelectric (TE) application potential compared to its orthorhombic counterpart. Despite recent advancements, systematic investigations on the combined effects of composite engineering strategies in optimizing TE properties of cubic-phase SnSe-based materials remain scarce. In this study, multi-walled carbon nanotubes (MWCNTs) are incorporated into the cubic-phase Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub> to regulate its TE performance through a combination of ultrasonic dispersion and rapid hot-pressing sintering. The introduced MWCNTs promote the formation of “high-speed channel” for carrier transport and serve as additional phonon-scattering centers, resulting in a synergistic optimization of electrical and thermal transport properties. A maximum <i>ZT</i> value of 0.85 is achieved in the prepared 1.50 wt.% MWCNTs/Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub> sample at 750 K, representing a 21% improvement compared to the pristine Sn<sub>0.50</sub>Ag<sub>0.25</sub>Bi<sub>0.25</sub>Se<sub>0.50</sub>Te<sub>0.50</sub> sample. This finding establishes a scalable nano-composite engineering paradigm for enhancing TE performance of cubic-phase SnSe-based materials.
ISSN:2073-4352

Similar Items