Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Enhancing the thermoelectric performance of a Ti2FeNiSb2 double half-Heusler alloy through excess Ni-induced full-Heusler nanoprecipitates

Authors
Hasan, RahidulGu, YanKim, Se YunChun, Dong WonLee, Kyu Hyoung
Issue Date
Sep-2023
Publisher
ROYAL SOC CHEMISTRY
Citation
INORGANIC CHEMISTRY FRONTIERS, v.10, no.19, pp 5662 - 5667
Pages
6
Indexed
SCIE
SCOPUS
Journal Title
INORGANIC CHEMISTRY FRONTIERS
Volume
10
Number
19
Start Page
5662
End Page
5667
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68747
DOI
10.1039/d3qi01132a
ISSN
2052-1553
2052-1553
Abstract
Double half-Heuslers (DHHs) have emerged as promising candidates for thermoelectric power generation at mid-high temperatures due to their exceptional chemical and mechanical stability, as well as high electronic transport properties. However, their limited thermoelectric conversion efficiency (ZT) has hindered their practical application. In the present study, we propose an approach to enhance the ZT of DHHs by generating full-Heusler (FH) nanoprecipitates through a simple and scalable compositional tuning method. We investigate the effectiveness of this approach using Ti2FeNiSb2 as a model system. Our results reveal that FH nanoprecipitates can substantially intensify the phonon scattering in Ti2FeNiSb2, leading to an ultra-low lattice thermal conductivity of similar to 0.9 W m(-1) K-1 at 973 K. Additionally, filtering of low-energy carriers, in the presence of FH nanoprecipitates, further improves the electronic transport properties. As a result, we achieved a relatively high zT of 0.31 in Ti2FeNi1.05Sb2, which is 1.5-fold enhancement compared to the pristine Ti2FeNiSb2. These findings offer attractive opportunities for designing and developing high-performance DHH-based thermoelectric materials.
Files in This Item
There are no files associated with this item.
Appears in
Collections
공과대학 > Department of Materials Science & Engineering, major in Ceramic Engineering > Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetrics

Total Views & Downloads

BROWSE