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High thermoelectric performance in Cu2Se superionic conductor with enhanced liquid-like behaviour by dispersing SiC

Journal Article


Abstract


  • The liquid-like thermoelectric material Cu 2 Se has shown great promise in recent years by virtue of its good electrical properties and inherent low thermal conductivity, which could be optimized by engineering liquid copper ions for further application. Herein, we reported, for the first time, that thermoelectric performance could be remarkably improved via introducing SiC nanoparticles into the Cu 2 Se system. Experimental results proved that additional SiC generated more deformation and stress, which feasibly facilitated more migration of charged copper ions and in turn increased conductivity. A maximum enhancement in electrical conductivity of about 7 times in the composite with 0.05 wt% SiC content was obtained compared with the pure Cu 2 Se, consistent with an increase in phonon scattering by additional interfaces. We obtained a high figure of merit, ZT, of 2.0 at 875 K in the Cu 2 Se/0.05 wt% SiC composite, which was 186% higher than that of the pure Cu 2 Se (∼0.7).

Authors


  •   Lei, Jingdan (external author)
  •   Ma, Zheng (external author)
  •   Zhang, De (external author)
  •   Chen, Yanqun (external author)
  •   Wang, Chao (external author)
  •   Yang, Xiaoyun (external author)
  •   Cheng, Zhenxiang
  •   Wang, Yuanxu (external author)

Publication Date


  • 2019

Citation


  • Lei, J., Ma, Z., Zhang, D., Chen, Y., Wang, C., Yang, X., Cheng, Z. & Wang, Y. (2019). High thermoelectric performance in Cu2Se superionic conductor with enhanced liquid-like behaviour by dispersing SiC. Journal of Materials Chemistry A, 7 (12), 7006-7014.

Scopus Eid


  • 2-s2.0-85063143712

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3525

Number Of Pages


  • 8

Start Page


  • 7006

End Page


  • 7014

Volume


  • 7

Issue


  • 12

Place Of Publication


  • United Kingdom

Abstract


  • The liquid-like thermoelectric material Cu 2 Se has shown great promise in recent years by virtue of its good electrical properties and inherent low thermal conductivity, which could be optimized by engineering liquid copper ions for further application. Herein, we reported, for the first time, that thermoelectric performance could be remarkably improved via introducing SiC nanoparticles into the Cu 2 Se system. Experimental results proved that additional SiC generated more deformation and stress, which feasibly facilitated more migration of charged copper ions and in turn increased conductivity. A maximum enhancement in electrical conductivity of about 7 times in the composite with 0.05 wt% SiC content was obtained compared with the pure Cu 2 Se, consistent with an increase in phonon scattering by additional interfaces. We obtained a high figure of merit, ZT, of 2.0 at 875 K in the Cu 2 Se/0.05 wt% SiC composite, which was 186% higher than that of the pure Cu 2 Se (∼0.7).

Authors


  •   Lei, Jingdan (external author)
  •   Ma, Zheng (external author)
  •   Zhang, De (external author)
  •   Chen, Yanqun (external author)
  •   Wang, Chao (external author)
  •   Yang, Xiaoyun (external author)
  •   Cheng, Zhenxiang
  •   Wang, Yuanxu (external author)

Publication Date


  • 2019

Citation


  • Lei, J., Ma, Z., Zhang, D., Chen, Y., Wang, C., Yang, X., Cheng, Z. & Wang, Y. (2019). High thermoelectric performance in Cu2Se superionic conductor with enhanced liquid-like behaviour by dispersing SiC. Journal of Materials Chemistry A, 7 (12), 7006-7014.

Scopus Eid


  • 2-s2.0-85063143712

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3525

Number Of Pages


  • 8

Start Page


  • 7006

End Page


  • 7014

Volume


  • 7

Issue


  • 12

Place Of Publication


  • United Kingdom