Facile synthesis of Cu7Te4 nanorods and the enhanced thermoelectric properties of Cu7Te4-Bi0.4Sb1.6Te3 nanocomposites

被引：31

作者：

Tan, Li Ping ^{[1
]}

Sun, Ting ^{[1
]}

Fan, Shufen ^{[1
]}

Ng, Lay Yong ^{[1
]}

Suwardi, Ady ^{[1
]}

Yan, Qingyu ^{[1
]}

Hng, Huey Hoon ^{[1
,2
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Temasek Labs NTU, Singapore 638075, Singapore

来源：

NANO ENERGY | 2013年 / 2卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Composite materials; Thermoelectric materials; Chalcogenides; Nanostructures; HYDROTHERMAL SYNTHESIS; COPPER CHALCOGENIDES; TRANSPORT-PROPERTIES; ELECTRONIC-STRUCTURE; SOLID-SOLUTIONS; BISMUTH; NANOSTRUCTURES; NANOPARTICLES; THERMOPOWER; PERFORMANCE;

D O I：

10.1016/j.nanoen.2012.07.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanocomposite thermoelectric (TE) materials have received great interest in recent years due to the large improvement in the figure of merit (ZT), which exceed the ZT approximate to 1 barrier. Herein, we report a facile method for the synthesis of surfactant-free Cu7Te4 using Te nanorods as templates, and the observed improvement of TE properties obtained by dispersing Cu7Te4 nanorods in a Bi0.4Sb1.6Te3 matrix. The matrix itself yields a maximum power factor of 2.45 mW/m K-2 at 300 K, while the addition of 5 wt% of Cu7Te4 nanorods increases and shifts the maximum power factor to 3.3 mW/m K-2 at 345 K. The maximum ZT obtained for the 5 wt% Cu7Te4-Bi0.4Sb1.6Te3 nanocomposite is 1.14 at 444 K, which is nearly 27% higher than the peak ZT achieved for the Bi0.4Sb1.6Te3 matrix. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：4 / 11

页数：8

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