Achieving high thermoelectric performance of Ni/Cu modified Bi0.5Sb1.5Te3 composites by a facile electroless plating

Huang, Zhong-Yue and Zhang, He and Yang, Lei and Zhu, Bin and Zheng, Kun and Hong, Min and Yu, Yuan and Zu, Fang-Qiu and Zou, Jin and Chen, Zhi-Gang (2018) Achieving high thermoelectric performance of Ni/Cu modified Bi0.5Sb1.5Te3 composites by a facile electroless plating. Materials Today Energy, 9. pp. 383-390. ISSN 2468-6069


Thermoelectric materials have drawn great attention due to their ability to convert heat directly into electricity and vice versa. However, practical applications of thermoelectric materials have been limited by their high cost, low efficiency, and poor mechanical property. To address this issue, we fabricate NiCu/Bi0.5Sb1.5Te3 thermoelectric composites via a facile electroless plating method and spark plasma sintering, which successfully achieve an enhanced peak figure of merit, zT, of similar to 1.16 at 425 K for 0.3 wt.% Ni-0.15 wt.% Cu/Bi0.5Sb1.5Te3 composites with high average zT of 0.95 in the wide temperature range between 300 and 527 K. Through detailed structural characterization, we found that the plated Cu can be doped into BST matrix and partial Cu/Ni can react with the matrix to form nanoinclusions, which can decouple the interdependent electrical and thermal transport properties, enabling us to achieve synergistic enhancement of zT. This study provides a cheap, simple, fast and effective way to improve the thermoelectric of Bi2Te3-based alloys for high-performance thermoelectric power harvesting and refrigeration.

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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: 21 Feb 2019 01:46
Last Modified: 22 Feb 2019 00:27
Uncontrolled Keywords: thermoelectric materials; bismuth telluride; high performance; average zT; electroless plating; frequency phonon scatterings; transport-properties; bulk alloys; thermal-conductivity; carrier scattering; bismuth telluride; nanoparticles; nanocomposites; bi2te3; enhancement
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
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1016/j.mtener.2018.06.011

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