文献类型：期刊文献

英文题名：Morphology Engineering Enhancing Thermoelectric Performance of Hydrothermal 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

机构：[1] Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China; [2] Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100124, China; [3] College of Robotics, Beijing Union University, Beijing, 100101, China

第一机构：Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220101203)

语种：英文

外文关键词：Copper compounds - Morphology - Sulfur compounds - Thermal conductivity - Thermoelectricity

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 μW 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 ZT max value of 1.1 at 773 K is observed, higher than the reported Cu2-xS thermoelectric material using chemical methods. This study paves a facile microstructure engineering strategy for the development of high performance thermoelectric materials. ? 2022, The Authors. All rights reserved.