Journal
MATERIALS TODAY PHYSICS
Volume 28, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtphys.2022.100898
Keywords
Thermoelectric; Composites; Oxides; BiCuSeO; Nanowires
Funding
- National Natural Science Foundation of China [51772016]
- Fundamental Research Funds for the Central Universities [XK1802-2]
Ask authors/readers for more resources
In this paper, Pb-doped BiCuSeO was prepared to improve the electrical conductivity of BiCuSeO. Adding Te powder and Te nanowires further decreased the thermal conductivity, resulting in optimized thermoelectric performance.
Layer-structured BiCuSeO oxyselenides with intrinsic low lattice thermal conductivity, non-toxicity, non-pollution and outstanding thermal stability is regarded as a promising thermoelectric material, but its application is limited by the poor electrical conductivity. In this paper, Pb-doped BiCuSeO (Bi1-xPbxCuSeO) was fabricated via a fast preparation method combined self-propagating high-temperature synthesis (SHS) with spark plasma sintering (SPS). Although Pb doping could greatly improve the electrical conductivity of BiCuSeO, the thermal conductivity increased as well, and it limits the thermoelectric performance. To further optimize the electron and phonon transport properties, Te powders and Te nanowires were introduced in Bi0middot9Pb0middot1CuSeO by ball milling, respectively. As a result, the thermal conductivity largely decreased with a maintained electrical performance. Ultimately, a maximum ZT value of 1.0 at 873 K was achieved for the 5 vol% Te nanowire + Bi0middot9Pb0middot1CuSeO sample, which is about 2.5 times as large as that for pristine BiCuSeO. Our work paves an alternative strategy for tuning the thermoelectric performance of BiCuSeO through Bi site doping combined low-dimension nanocomposites.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available