Utilizing the phonon glass electron crystal concept to improve the thermoelectric properties of combined Yb-stuffed and Te-substituted CoSb3

Jibran Khaliq, Qinghui Jiang, Junyou Yang, Kevin Simpson, Haixue Yan, Michael Reece

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

A cost-effective and rapid mechanical alloying method was used to prepare Yb-stuffed and Te-substituted CoSb3 to study the thermoelectric properties of this material. Yb rattles inside the cage-like structure of CoSb3 which effectively reduces the phonon mean free path and results in a lattice thermal conductivity comparable to those of costly nanostructured CoSb3 materials. A very low lattice thermal conductivity of 1.17 W m−1 K−1 at ∼550 K was obtained. A zT value of ∼0.7 was reported at 600 K due to the very low lattice thermal conductivity.
Original languageEnglish
Pages (from-to)63 - 66
JournalScripta Materialia
Volume72
Issue numberSupple
Early online date1 Nov 2013
DOIs
Publication statusPublished - 1 Feb 2014

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