Thermoelectricity of n-type MnBi4S7-7xSe7x solid solution

doi:10.1016/j.cej.2020.125219

	Thermoelectricity of n-type MnBi4S7-7xSe7x solid solution
	Xi, Ming 4; Zhu, Huaxing 4; Wu, Hong 1,4,5; Yang, Yibin 4; Yan, Yanci 4; Wang, Guoyu 1,5; Wang, Guiwen 2; Li, JiangYu 3; Lu, Xu 4; Zhou, Xiaoyuan 2,4
刊名	CHEMICAL ENGINEERING JOURNAL
	2020-09-15
卷号	396 页码:9
关键词	Eco-friendly Thermoelectric Low lattice thermal conductivity Anharmonicity n-type sulfides
ISSN号	1385-8947
DOI	10.1016/j.cej.2020.125219
通讯作者	Lu, Xu(luxu@cqu.edu.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要	We report self-doped MnBi4S7-xSe7x solid solution as a novel n-type sulfide thermoelectric material with weak anisotropic transport properties. These compounds feature intrinsically low lattice thermal conductivity of 0.5-0.8 W m(-1)K(-1) in the temperature range of 300-800 K, which is well explained by strong lattice anharmonic vibration, mainly from Bi atoms as verified by theoretical calculations. Intentionally introduced sulfur deficiency acts as an efficient electron donor that enhances the electrical conductivity of MnBi4S7 while alloying with Se can promote electrical conductivity and further reduce thermal conductivity by 25% in the whole temperature region. As a result, the sample of with nominal composition of MnBi4S5.46Se1.4 shows a peak zT of similar to 0.31 at 770 K vertical to the pressing direction.
资助项目	National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[11674040] ; National Natural Science Foundation of China[51672270] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[2018CDYJSY0055] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SLH016] ; Project for Fundamental and Frontier Research in Chongqing[CSTC2017JCYJAX0388] ; Shenzhen Science and Technology Innovation Committee[JCYJ20170818155752559]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000551969200049
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/11284]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Lu, Xu; Zhou, Xiaoyuan
作者单位	1.Univ Chinese Acad Sci, Beijing 100044, Peoples R China 2.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China 3.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen Key Lab Nanobiomech, Shenzhen 518055, Guangdong, Peoples R China 4.Chongqing Univ, Coll Phys, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Chongqing 401331, Peoples R China 5.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Xi, Ming,Zhu, Huaxing,Wu, Hong,et al. Thermoelectricity of n-type MnBi4S7-7xSe7x solid solution[J]. CHEMICAL ENGINEERING JOURNAL,2020,396:9.
APA	Xi, Ming.,Zhu, Huaxing.,Wu, Hong.,Yang, Yibin.,Yan, Yanci.,...&Zhou, Xiaoyuan.(2020).Thermoelectricity of n-type MnBi4S7-7xSe7x solid solution.CHEMICAL ENGINEERING JOURNAL,396,9.
MLA	Xi, Ming,et al."Thermoelectricity of n-type MnBi4S7-7xSe7x solid solution".CHEMICAL ENGINEERING JOURNAL 396(2020):9.