Yang, Lei and Chen, Zhi-Gang and Han, Guang and Hong, Min and Zou, Yichao and Zou, Jin (2015) High-performance thermoelectric Cu2Se nanoplates through nanostructure engineering. Nano Energy, 16. pp. 367-374. ISSN 2211-2855
Abstract
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 / Department / School: | 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 : | 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials |
| Identification Number or DOI: | 10.1016/j.nanoen.2015.07.012 |
| URI: | http://eprints.usq.edu.au/id/eprint/31679 |
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