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Realizing Enhanced Thermoelectric Performance and Hardness in Icosahedral Cu5FeS4-xSex with High-Density Twin Boundaries

文献类型：期刊论文

作者Wang, Huan5; Zheng, Sikang5; Wu, Hong5; Xiong, Xin5; Xiong, Qihong5; Wang, Hengyang4; Wang, Yang5; Zhang, Bin3; Lu, Xu5; Han, Guang4
刊名SMALL
出版日期2021-11-05
页码10
ISSN号1613-6810
关键词Cu 5FeS (4) hardness icosahedron thermoelectric materials twin boundary
DOI10.1002/smll.202104592
通讯作者Han, Guang(guang.han@cqu.edu.cn) ; Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要Bornite (Cu5FeS4) is an Earth-abundant, nontoxic thermoelectric material. Herein, twin engineering and Se alloying are combined in order to further improve its thermoelectric performance. Cu5FeS4-xSex (0 <= x <= 0.4) icosahedral nanoparticles, containing high-density twin boundaries, have been synthesized by a colloidal method. Spark plasma sintering retains twin boundaries in the pellets sintered from Cu5FeS4-xSex colloidal powders. Thermoelectric property measurement demonstrates that alloying Se increases the carrier concentration, leading to much-improved power factor in Se-substituted Cu5FeS4, for example, 0.84 mW m(-1) K-2 at 726 K for Cu5FeS3.6Se0.4; low lattice thermal conductivity is also achieved, due to intrinsic structural complexity, distorted crystal structure, and existing twin boundaries and point defects. As a result, a maximum zT of 0.75 is attained for Cu5FeS3.6Se0.4 at 726 K, which is about 23% higher than that of Cu5FeS4 and compares favorably to that of reported Cu5FeS4-based materials. In addition, the Cu5FeS4-xSex samples containing twin boundaries also obtain improved hardness compared to the ones fabricated by melting-annealing or ball milling. This work demonstrates an effective twin engineering-composition tuning strategy toward enhanced thermoelectric and mechanical properties of Cu5FeS4-based materials.
资助项目National Natural Science Foundation of China[52071041] ; National Natural Science Foundation of China[11874356] ; National Natural Science Foundation of China[51802034] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
出版者WILEY-V C H VERLAG GMBH
WOS记录号WOS:000714800000001
源URL[http://119.78.100.138/handle/2HOD01W0/14407]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Han, Guang; Wang, Guoyu; Zhou, Xiaoyuan
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100044, Peoples R China
3.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
4.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
5.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Huan,Zheng, Sikang,Wu, Hong,et al. Realizing Enhanced Thermoelectric Performance and Hardness in Icosahedral Cu5FeS4-xSex with High-Density Twin Boundaries[J]. SMALL,2021:10.
APA Wang, Huan.,Zheng, Sikang.,Wu, Hong.,Xiong, Xin.,Xiong, Qihong.,...&Zhou, Xiaoyuan.(2021).Realizing Enhanced Thermoelectric Performance and Hardness in Icosahedral Cu5FeS4-xSex with High-Density Twin Boundaries.SMALL,10.
MLA Wang, Huan,et al."Realizing Enhanced Thermoelectric Performance and Hardness in Icosahedral Cu5FeS4-xSex with High-Density Twin Boundaries".SMALL (2021):10.

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来源：重庆绿色智能技术研究院

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