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Se substitution and micro-nano-scale porosity enhancing thermoelectric Cu2Te

文献类型：期刊论文

作者Shi, Xiaoman1; Wang, Guoyu2,3; Wang, Ruifeng2,3; Zhou, Xiaoyuan4; Xu, Jingtao5; Tang, Jun1,6; Ang, Ran1,6
刊名CHINESE PHYSICS B
出版日期2018-04-01
卷号27期号:4页码:5
关键词thermoelectrics Cu2Te porosity thermal conductivity
ISSN号1674-1056
DOI10.1088/1674-1056/27/4/047204
英文摘要Binary Cu-based chalcogenide thermoelectric materials have attracted a great deal of attention due to their outstanding physical properties and fascinating phase sequence. However, the relatively low figure of merit zT restricts their practical applications in power generation. A general approach to enhancing zT value is to produce nanostructured grains, while one disadvantage of such a method is the expansion of grain size in heating-up process. Here, we report a prominent improvement of zT in Cu2Te0.2Se0.8, which is several times larger than that of the matrix. This significant enhancement in thermoelectric performance is attributed to the formation of abundant porosity via cold press. These pores with nano-to micrometer size can manipulate phonon transport simultaneously, resulting in an apparent suppression of thermal conductivity. Moreover, the Se substitution triggers a rapid promotion of power factor, which compensates for the reduction of electrical properties due to carriers scattering by pores. Our strategy of porosity engineering by phonon scattering can also be highly applicable in enhancing the performances of other thermoelectric systems.
资助项目National Natural Science Foundation of China[51771126] ; National Natural Science Foundation of China[11774247] ; Youth Foundation of Science and Technology Department of Sichuan Province, China[2016JQ0051] ; Sichuan University Outstanding Young Scholars Research Funding[2015SCU04A20] ; World First-Class University Construction Funding ; Fundamental and Frontier Research Project in Chongqing[CSTC2015JCYJBX0026]
WOS研究方向Physics
语种英语
WOS记录号WOS:000430619900004
出版者IOP PUBLISHING LTD
源URL[http://119.78.100.138/handle/2HOD01W0/6361]  
专题机器人与3D打印技术创新中心
通讯作者Tang, Jun; Ang, Ran
作者单位1.Sichuan Univ, Inst Nucl Sci & Technol, Minist Educ, Key Lab Radiat Phys & Technol, Chengdu 610064, Sichuan, Peoples R China
2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
4.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
5.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
6.Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610065, Sichuan, Peoples R China
推荐引用方式
GB/T 7714		 Shi, Xiaoman,Wang, Guoyu,Wang, Ruifeng,et al. Se substitution and micro-nano-scale porosity enhancing thermoelectric Cu2Te[J]. CHINESE PHYSICS B,2018,27(4):5.
APA Shi, Xiaoman.,Wang, Guoyu.,Wang, Ruifeng.,Zhou, Xiaoyuan.,Xu, Jingtao.,...&Ang, Ran.(2018).Se substitution and micro-nano-scale porosity enhancing thermoelectric Cu2Te.CHINESE PHYSICS B,27(4),5.
MLA Shi, Xiaoman,et al."Se substitution and micro-nano-scale porosity enhancing thermoelectric Cu2Te".CHINESE PHYSICS B 27.4(2018):5.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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