Enhanced thermoelectric transport properties of La0.98Sr0.02CoO3-BiCuSeO composite

Authors

Muhammad Umer Farooq, University of Science And Technology Beijing
Ziyuan Gao, University of Science And Technology Beijing
Sajid Butt, Tsinghua University, Institute of Space Technology
Kewei Gao, University of Science And Technology Beijing
Xiao Lu Pang, University of Science And Technology Beijing
Zhu Guangyi, Xinjiang Inspection Institute of Special Equipment
Hidayat Ullah Shah, University of Science And Technology Beijing
Hasnain Mehdi Jafri, University of Science And Technology Beijing
Asif Mahmood, Peking University
Xigui Sun, University of Science And Technology Beijing
Nasir Mahmood, University of WollongongFollow

RIS ID

108748

Publication Details

Farooq, M. Umer., Gao, Z., Butt, S., Gao, K., Pang, X., Guangyi, Z., Ullah Shah, H., Mehdi Jafri, H., Mahmood, A., Sun, X. & Mahmood, N. (2016). Enhanced thermoelectric transport properties of La0.98Sr0.02CoO3-BiCuSeO composite. Journal of Electrical Engineering, 4 (2), 52-57.

Abstract

We report a facile method to enhance the thermoelectric efficiency of La0.98Sr0.02CoO3 by introducing BiCuSeO as a secondary phase with ultra-low thermal conductivity. Inclusion of secondary phase results in reducing the total thermal conductivity by suppressing the lattice and electronic thermal conductivities and also contributes to enhancement in the Seebeck coefficient. The wide grain size distribution of La0.98Sr0.02CoO3-BiCuSeO composite facilitates in breaking the interlinked transport properties through increased scattering of different wavelength phonons. The combined effect of enhanced Seebeck coefficient and ultra-low thermal conductivity, results in an improved ZT value of 0.07 at 923 K. The proposed strategy can be opted for improvement in the thermoelectric efficiency of other thermoelectric materials as well.