Highly Suppressed Thermal Conductivity in Diamond-like Cu2SnS3by Dense Dislocation

Chao Li, Haili Song, Yan Cheng, Ruijuan Qi, Rong Huang, Chengqiang Cui, Yifeng Wang, Yu Zhang, Lei Miao

研究成果査読

抄録

Cu2SnS3 is a promising low-cost and eco-friendly thermoelectric material. However, its rigid diamond crystal structure leads to a high thermal conductivity and hence its overall poor thermoelectric properties. Here we show Ni doping at the Sn site can introduce a dense dislocation of density of ∼4.83 × 109 cm-2 to Cu2SnS3. The abundant dislocations generate a large strain within the matrix, which effectively scatters heat-carrying phonons. The resultant lowest κlatt reaches ∼0.41 W m-1 K-1 at 723 K, approaching the theoretical limit (0.30 W m-1 K-1). The regulation strategy on dislocations is expected to reduce the thermal conductivity and improve the functionalities of other diamond-like materials.

本文言語English
ページ(範囲)8728-8733
ページ数6
ジャーナルACS Applied Energy Materials
4
9
DOI
出版ステータスPublished - 2021 9 27

ASJC Scopus subject areas

  • 化学工学(その他)
  • エネルギー工学および電力技術
  • 電気化学
  • 電子工学および電気工学
  • 材料化学

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