Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres with ultralow thermal conductivity and high zT

Zhou, Tian and Wang, Lijun and Zheng, Shuqi and Hong, Min and Fang, Teng and Bai, Peng-Peng and Chang, Siyi and Cui, Wenlin and Shi, Xiaolei and Zhao, Huaizhou and Chen, Zhi-Gang (2018) Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres with ultralow thermal conductivity and high zT. Nano Energy, 49. pp. 221-229. ISSN 2211-2855

Abstract

Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres have been synthesised by a microwave-assisted solvothermal method. Through detailed structural characterization and analysis, we elucidate that the growth temperature is the key factor to tailor the hierarchical Cu3SbSe4 microspheres assembled from nanoparticles and nanosheets. Such unique structures can strengthen phonon scatterings, leading to an ultralow thermal conductivity of 0.38 W m(-1) K-1 at 623 K in the Ti-doped Cu3Sb0.93Ti0.07Se4 sample. Ti doping can also increase the hole concentration to the optimal level and consequently enhance the power factor in the Cu3Sb0.96Ti0.04Se4 sample, resulting in a promising peak zT of similar to 0.59 at 623 K, which approximately doubles that of the pristine Cu3SbSe4. This study demonstrates a facile wet chemical method to synthesise large-scale Cu3SbSe4-based thermoelectric materials, which provides an alternative methodology to fabricate non-toxic thermoelectric materials.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - No Department
Date Deposited: 19 Feb 2019 04:45
Last Modified: 04 Mar 2019 04:20
Uncontrolled Keywords: microwave-assisted solvothermal method; thermoelectric; flower-like hierarchical structure; Ti-doped Cu3SbSe4; performance bulk thermoelectrics; frequency phonon scatterings; diamond-like structure; coprecipitation synthesis; transport-properties; panoscopic approach; compound; chalcogenides; power; SNTE
Fields of Research : 03 Chemical Sciences > 0302 Inorganic Chemistry > 030206 Solid State Chemistry
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
02 Physical Sciences > 0204 Condensed Matter Physics > 020403 Condensed Matter Modelling and Density Functional Theory
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1016/j.nanoen.2018.04.035
URI: http://eprints.usq.edu.au/id/eprint/35481

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