High-performance thermoelectric Cu<inf>2</inf>Se nanoplates through nanostructure engineering

Yang, Lei, Chen, Zhi-Gang, Han, Guang, Hong, Min, Zou, Yichao and Zou, Jin (2015) High-performance thermoelectric Cu<inf>2</inf>Se nanoplates through nanostructure engineering. Nano Energy, 16 367-374. doi:10.1016/j.nanoen.2015.07.012

Author Yang, Lei
Chen, Zhi-Gang
Han, Guang
Hong, Min
Zou, Yichao
Zou, Jin
Title High-performance thermoelectric Cu2Se nanoplates through nanostructure engineering
Journal name Nano Energy
ISSN 2211-2855
Publication date 2015-09-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.nanoen.2015.07.012
Open Access Status Not Open Access
Volume 16
Start page 367
End page 374
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
As one of promising thermoelectric materials with intrinsic high figure of merit (ZT), Cu2Se provides opportunities to tackle the global energy crisis via converting waste heat into electricity. Here, β-phase Cu2Se nanostructures were synthesized using a facile and large-scale solvothermal method. After sparking plasma sintering, the resultant Cu2Se pellets show outstanding thermoelectric properties with an ultra-low lattice thermal conductivity (as low as ~0.2 W m−1 K−1) that resulted in a recorded high ZT of 1.82 at 850 K. Through detailed structural investigations, high-densities small-angle grain boundaries with dislocations have been found in sintered Cu2Se pellets through nanostructure engineering, which results in additional phonon scattering to reduce the lattice thermal conductivity. This study provides an important approach to enhance thermoelectric performance of potential thermoelectric materials.
Keyword Thermoelectric
High ZT
Copper selenide
Nanostructure engineering
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

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