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Phase Tuning for Enhancing the Thermoelectric Performance of Solution-Synthesized Cu2-xS

文献类型：期刊论文

作者Yang, Meiling5; Liu, Xiaofang5; Zhang, Bin4; Chen, Yao5; Wang, Hengyang5; Yu, Jian5; Wang, Guoyu3; Xu, Jingtao1; Zhou, Xiaoyuan2,4; Han, Guang5
刊名ACS APPLIED MATERIALS & INTERFACES
出版日期2021-08-25
卷号13期号:33页码:39541-39549
关键词thermoelectric copper sulfide solvothermal method phase tuning copper vacancy
ISSN号1944-8244
DOI10.1021/acsami.1c13050
通讯作者Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn) ; Han, Guang(guang.han@cqu.edu.cn)
英文摘要Cu2S, consisting of Earth-abundant and eco-friendly elements, is a promising candidate for thermoelectric energy conversion. The stoichiometric Cu2S has intrinsically low thermal conductivity together with meagre electrical conductivity. Herein, in order to improve the electrical properties, we develop a facile solvothermal method for synthesizing a series of Cu2-xS with tunable phase compositions. With reduction in the CuCl/Na2S molar ratio in the solution precursors from 2:1 to 1.75:1, the solvothermal products transform from single-phase Cu2S into Cu2S-Cu1.96S composites, which are preserved in the hot-pressed pellets. The decreased CuCl/Na2S molar ratio results in increased room-temperature Hall carrier concentration, leading to enhanced electrical conductivity. Specifically, the pellet corresponding to the 1.75:1 CuCl/Na2S precursor ratio obtains a power factor of 8.04 mu W cm(-1) K-2 at 815 K, which is similar to 735% of the value obtained by stoichiometric Cu2S. Along with the moderate thermal conductivity, this sample achieves an enhanced zT value of 0.87 at 815 K, representing a similar to 250% increase when compared to stoichiometric Cu2S. This study demonstrates an effective strategy in enhancing the thermoelectric performance of solution-synthesized Cu2S-based materials by phase tuning.
资助项目National Natural Science Foundation of China[51802034] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51672270] ; Fundamental Research Funds for the Central Universities[2019CDQYCL003] ; Chongqing Research Program of Basic Research and Frontier Technology[cstc2018jcyjAX0346] ; Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University
WOS研究方向Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:000691785200058
出版者AMER CHEMICAL SOC
源URL[http://119.78.100.138/handle/2HOD01W0/14284]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Zhou, Xiaoyuan; Han, Guang
作者单位1.Ningbo Ruiling Adv Energy Mat Inst Co Ltd, Ningbo 315500, Peoples R China
2.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
3.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
4.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
5.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Meiling,Liu, Xiaofang,Zhang, Bin,et al. Phase Tuning for Enhancing the Thermoelectric Performance of Solution-Synthesized Cu2-xS[J]. ACS APPLIED MATERIALS & INTERFACES,2021,13(33):39541-39549.
APA Yang, Meiling.,Liu, Xiaofang.,Zhang, Bin.,Chen, Yao.,Wang, Hengyang.,...&Han, Guang.(2021).Phase Tuning for Enhancing the Thermoelectric Performance of Solution-Synthesized Cu2-xS.ACS APPLIED MATERIALS & INTERFACES,13(33),39541-39549.
MLA Yang, Meiling,et al."Phase Tuning for Enhancing the Thermoelectric Performance of Solution-Synthesized Cu2-xS".ACS APPLIED MATERIALS & INTERFACES 13.33(2021):39541-39549.

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来源：重庆绿色智能技术研究院

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