High-performance thermoelectric Cu2Se nanoplates through nanostructure engineering

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.


Statistics for USQ ePrint 31679
Statistics for this ePrint Item
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

Actions (login required)

View Item Archive Repository Staff Only