Strategy of Extra Zr Doping on the Enhancement of Thermoelectric Performance for TiZrxNiSn Synthesized by a Modified Solid-State Reaction

Jun Liang Chen, Hengquan Yang, Chengyan Liu, Jisheng Liang, Lei Miao, Zhongwei Zhang, Pengfei Liu, Kenta Yoshida, Chen Chen, Qian Zhang, Qi Zhou, Yuntiao Liao, Ping Wang, Zhixia Li, Biaolin Peng

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Half-Heusler alloys, which possess the advantages of high thermal stability, a large power factor, and good mechanical property, have been attracting increasing interest in mid-temperature thermoelectric applications. In this work, extra Zr-doped TiZrxNiSn samples were successfully prepared by a modified solid-state reaction followed by spark plasma sintering. It demonstrates that extra Zr doping could not only improve the power factor on account of an increase in the Seebeck coefficient but also suppress the lattice thermal conductivity originated from the strengthened phonon scattering by the superlattice nanodomains and the secondary nanoparticles. As a consequence, an increased power factor of 3.29 mW m-1 K-2 and a decreased lattice thermal conductivity of 1.74 W m-1 K-1 are achieved in TiZr0.015NiSn, leading to a peak ZT as high as 0.88 at 773 K and an average ZT value up to 0.62 in the temperature range of 373-773 K. This work gives guidance for optimizing the thermoelectric performance of TiNiSn-based alloys by modulating the microstructures on the secondary nanophases and superlattice nanodomains.

本文言語English
ページ(範囲)48801-48809
ページ数9
ジャーナルACS Applied Materials and Interfaces
13
41
DOI
出版ステータスPublished - 2021 10月 20

ASJC Scopus subject areas

  • 材料科学(全般)

フィンガープリント

「Strategy of Extra Zr Doping on the Enhancement of Thermoelectric Performance for TiZrxNiSn Synthesized by a Modified Solid-State Reaction」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル