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Materials Technology
Advanced Performance Materials
Volume 35, 2020 - Issue 9-10: Future materials for energy conversion and storage
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Research Paper

Cu1.75Te nanowires as building blocks to fabricate bulk materials with enhanced thermoelectric performance

Bangzhi Gea School of Mechanical and Electrical Engineering, Xinyu University, Xinyu, China;b State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, ChinaView further author information
,
Jiabin Hub State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, ChinaView further author information
,
Qiong Wangb State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, ChinaView further author information
,
Hongyan Xiab State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, ChinaView further author information
,
Shunjian Xua School of Mechanical and Electrical Engineering, Xinyu University, Xinyu, ChinaCorrespondence[email protected]
View further author information
&
Zhongqi Shib State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, ChinaCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0001-7742-3528View further author information
ORCID Icon
Pages 529-533 | Received 01 Nov 2019, Accepted 18 Nov 2019, Published online: 11 Dec 2019
 
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ABSTRACT

The thermoelectric (TE) technology can harvest the waste heat to generate electrical energy. However, TE parameters decoupling is a big challenge to optimise the performance. Herein, we fabricated the Cu1.75Te nanowires (NWs) based bulk materials by spark plasma sintering of the solvothermal synthesised Cu1.75Te NWs towards decouple the thermal and electric performances. The results indicate that the ultrathin Cu1.75Te NWs with the diameter of ~10 nm can be synthesised, which serve as building blocks for fabricating bulk TE materials with nanonetwork structure inside the bulk. This unique nanonetwork structure plays a vital role in decoupling TE parameters. Its peak zT reaches 0.09, higher than the counterparts of reported Cu2Te bulk and Cu1.75Te nanosheets based bulk. Thus, building Cu1.75Te NWs based bulk materials is thought to be an effective way to decouple the TE parameters.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51872222, 51572111] and the Shaanxi Innovation Capacity Support Program [2018TD-031].

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