文献类型：期刊文献

英文题名：Thermoelectric performance of hydrothermally synthesized micro/nano Cu2-xS

作者：Yue, Ziwei[1,2];Zhou, Wei[1,2];Ji, Xiaoliang[1,2];Wang, Yishu[1,2];Guo, Fu[1,2,3]

第一作者：Yue, Ziwei

通讯作者：Guo, F[1]

机构：[1]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China;[2]Beijing Univ Technol, Key Lab Adv Funct Mat, Minist Educ, Beijing 100124, Peoples R China;[3]Beijing Union Univ, Coll Robot, Beijing 100101, Peoples R China

第一机构：Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

通讯机构：[1]corresponding author), Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China.

年份：2022

卷号：449

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000822992500005)】；

基金：We gratefully acknowledge the financial support from the following sources: National Key Research and Development Program (2018YFC1902501, 2019YFC1908005 and 2018YFC1903605) , Na-tional Natural Science Foundation of China (Grant No.61904008) .

语种：英文

外文关键词：Thermoelectric properties; Micro; nano structure; Cu (2-x) S; Hydrothermal method

摘要：Among the state-of-the-art thermoelectric materials, copper sulfides (Cu2S) have been predicted as promising thermoelectric materials due to their low intrinsic thermal conductivity. However, they still confront the problems with lower electrical properties, which distinctly restrict their thermoelectric application. Significant enhancement of thermoelectric properties is a great challenge owing to the common interdependence of electrical and thermal conductivity. Herein, a micro/nano Cu2-xS composite, with significantly enhanced thermoelectric properties, is prepared via a simple hydrothermal method. Due to the synergistic effect of the introduced nanostructure and the increased Cu1.96S contents, the micro/nano Cu2-xS bulk samples present a power factor of 10.1 mu W cm-1 K-2 at 773 K. Meanwhile, a decrease of the thermal conductivity to 0.69 W m-1 K-1 is obtained, originating from the strong phonon scattering of micro/nano structure. Remarkably, a ZTmax value of 1.1 at 773 K is obtained, which is higher than the reported Cu2-xS thermoelectric material using chemical methods. This study proposes a facile microstructure engineering strategy for the development of high-performance thermoelectric materials.