High-performance thermoelectric Cu2Se nanoplates through nanostructure engineering

Yang, Lei and Chen, Zhi-Gang ORCID: https://orcid.org/0000-0002-9309-7993 and Han, Guang and Hong, Min ORCID: https://orcid.org/0000-0002-6469-9194 and Zou, Yichao and Zou, Jin (2015) High-performance thermoelectric Cu2Se nanoplates through nanostructure engineering. Nano Energy, 16. pp. 367-374. ISSN 2211-2855


As one of promising thermoelectric materials with intrinsic high figure of merit (ZT), Cu<inf>2</inf>Se provides opportunities to tackle the global energy crisis via converting waste heat into electricity. Here, β-phase Cu<inf>2</inf>Se nanostructures were synthesized using a facile and large-scale solvothermal method. After sparking plasma sintering, the resultant Cu<inf>2</inf>Se pellets show outstanding thermoelectric properties with an ultra-low lattice thermal conductivity (as low as 0.2Wm<sup>-1</sup>K<sup>-1</sup>) that resulted in a recorded high ZT of 1.82 at 850K. Through detailed structural investigations, high-densities small-angle grain boundaries with dislocations have been found in sintered Cu<inf>2</inf>Se 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.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 13 Jun 2017 02:19
Last Modified: 27 Jun 2017 06:30
Uncontrolled Keywords: thermoelectric; high ZT; copper selenide; nanostructure engineering
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
Identification Number or DOI: https://doi.org/10.1016/j.nanoen.2015.07.012
URI: http://eprints.usq.edu.au/id/eprint/31679

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