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Constructing n-type Ag2Se/CNTs composites toward synergistically enhanced thermoelectric and mechanical performance

文献类型：期刊论文

作者Wang, Hengyang1,2; Liu, Xiaofang1,2; Zhou, Zizhen3; Wu, Hong3; Chen, Yao1,2; Zhang, Bin4; Wang, Guoyu5; Zhou, Xiaoyuan2,3,4; Han, Guang1,2
刊名ACTA MATERIALIA
出版日期2022-01-15
卷号223页码:9
关键词Thermoelectric Ag2Se Carbon nanotubes Nanocomposites Mechanical performance
ISSN号1359-6454
DOI10.1016/j.actamat.2021.117502
通讯作者Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn) ; Han, Guang(guang.han@cqu.edu.cn)
英文摘要Silver selenide (Ag2Se) is emerging as an intriguing material for thermoelectric refrigeration and energy harvesting at near room temperature. To promote the practical applications of Ag2Se, it is imperative to further depress its lattice thermal conductivity (kappa(L)) and enhance its mechanical properties. Herein, we develop a nanocompositing strategy toward both enhanced thermoelectric and mechanical performance. Through in situ solution synthesis combined with fast sintering, a series of Ag2Se/carbon nanotubes (CNTs) nanocomposites are controllably constructed. Tuning the concentration of CNTs effectively optimizes the transport and mechanical properties simultaneously, with 0.5 wt% as the optimized addition amount: (i) due to the interfacial effects, this optimal sample obtains a substantially low kappa(L) of 0.27 W m(-1) K-1 and a slightly enhanced power factor of 2.71 mW m(-1) K-2 at 375 K, leading to an exceptional peak zT of 0.97 at 375 K and a high average zT of similar to 0.89 over 300-375 K; (ii) this composite achieves a yield strength of 76.0 MPa and a compressive strength of 99.5 MPa, which are improved by 77.2% and 13.3% compared to pristine Ag2Se, respectively. This study develops an effective strategy to construct Ag2Se/CNTs nanocomposites, which advances both thermoelectric and mechanical performance. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目National Natural Science Foundation of China[51802034] ; National Natural Science Foundation of China[52071041] ; National Natural Science Foundation of China[11874356] ; Natural Science Foundation of Chongqing[cstc2021jcyj-msxmX0407] ; Chongqing Entrepreneurship and Innovation Program for the Returned Overseas Chinese Scholars[cx2021028]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000819472400005
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://119.78.100.138/handle/2HOD01W0/16015]  
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.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
2.Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
3.Chongqing Univ, Coll Phys, Chongqing 401331, Peoples R China
4.Chongqing Univ, Analyt & Testing Ctr, 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		 Wang, Hengyang,Liu, Xiaofang,Zhou, Zizhen,et al. Constructing n-type Ag2Se/CNTs composites toward synergistically enhanced thermoelectric and mechanical performance[J]. ACTA MATERIALIA,2022,223:9.
APA Wang, Hengyang.,Liu, Xiaofang.,Zhou, Zizhen.,Wu, Hong.,Chen, Yao.,...&Han, Guang.(2022).Constructing n-type Ag2Se/CNTs composites toward synergistically enhanced thermoelectric and mechanical performance.ACTA MATERIALIA,223,9.
MLA Wang, Hengyang,et al."Constructing n-type Ag2Se/CNTs composites toward synergistically enhanced thermoelectric and mechanical performance".ACTA MATERIALIA 223(2022):9.

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来源：重庆绿色智能技术研究院

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