Realizing high-performance thermoelectric power generation through grain boundary engineering of skutterudite-based nanocomposites

Qihao Zhang, Zhenxing Zhou, Maxwell Dylla, Matthias T. Agne, Yanzhong Pei, Lianjun Wang, Yunshan Tang, Jincheng Liao, Juan Li, Shengqiang Bai, Wan Jiang, Lidong Chen, Gerald Jeffrey Snyder

研究成果: Article査読

107 被引用数 (Scopus)

抄録

There have been few demonstrations that grain boundary engineering results in higher power generation efficiencies despite serious interest in using the strategy to improve zT. Using both Yb2O3 nanoprecipitates that decorate grain boundaries and carbon nanotubes to further reduce thermal conductivity and improve mechanical strength, a maximum zT of 1.43 at 875 K and a device ZT of approximately 1.0 in Yb-filled CoSb3-based nanocomposites are achieved. The preparation procedure of these materials is repeatable in mass production. Thermoelectric power generation modules based on these high-performance materials demonstrate a thermoelectric conversion efficiency of 9.3% under a temperature difference of 558 K. The results highlight nanostructured grain boundary engineering as a strategy to improve conventional thermoelectric materials, and the realistic prospect of large-scale thermoelectric power generation using skutterudite-based nanocomposites is demonstrated.

本文言語English
ページ(範囲)501-510
ページ数10
ジャーナルNano Energy
41
DOI
出版ステータスPublished - 2017 11月
外部発表はい

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)
  • 電子工学および電気工学

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