Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 42, 2016
Previous Article Next Article

Enhancement of thermoelectric properties of Ce0.9Fe3.75Ni0.25Sb12 p-type skutterudite by tellurium addition

Author affiliations

Abstract

Recently, research interests in p-type skutterudites are focused on multi-filling in the intrinsic void sites of Fe4−xMxSb12. The four-membered antimony rings, another important structural feature of p-type skutterudites, seem to be overlooked. In this study, Te has been employed to substitute Sb in single-filled p-type Ce0.9Fe3.75Ni0.25Sb12 skutterudite and a systematic investigation has been carried out into the doping effect of Te on the microstructure and thermoelectric properties of this material. With an increase of Te doping, the electrical resistivity decreases due to the increase of hole concentration and the gradual decrease of mobility; while the density of state effective mass increases rapidly with the increase of hole concentration due to the intrinsic multiple bands effects, thus the Seebeck coefficient increases slightly. In addition, Te doping on Sb sites changes the valance electron balance and results in the formation of microscale γ-Ce and nanoscale CeTe2 compound. These microscale and nanoscale precipitates work together with the atomic scale distortion of Sb4 rings by the substitution of Te for Sb, could scatter phonons with a wide range of frequency thus result in a significant reduction of the lattice thermal conductivity. Therefore the thermoelectric performance has been enhanced greatly, and a maximum ZT value of 1.0 at 773 K was obtained for the Ce0.9Fe3.75Ni0.25Sb11.9Te0.1 sample.

Graphical abstract: Enhancement of thermoelectric properties of Ce0.9Fe3.75Ni0.25Sb12 p-type skutterudite by tellurium addition

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 25 Jul 2016, accepted on 21 Sep 2016 and first published on 22 Sep 2016


Article type: Paper
DOI: 10.1039/C6TA06325J
Citation: J. Mater. Chem. A, 2016,4, 16499-16506
  •   Request permissions

    Enhancement of thermoelectric properties of Ce0.9Fe3.75Ni0.25Sb12 p-type skutterudite by tellurium addition

    L. Fu, Q. Jiang, J. Yang, J. Peng, Y. Xiao, Y. Luo, Z. Zhou and D. Zhang, J. Mater. Chem. A, 2016, 4, 16499
    DOI: 10.1039/C6TA06325J

Search articles by author