Regulating thermoelectric properties of Eu0.5Ca0.5Zn2Sb2 through Mg dopant

Wenkai Le; Wenwen Sheng; Runtao Liu; Minhui Yuan; Wenwei Yang; Jingyi Lv; Li Yin; Chen Chen; Xinyu Wang; Zongwei Zhang; Kejia Liu; Tianchi Wang; Qian Zhang; Jing Shuai

doi:10.1016/j.mtener.2022.101071

Regulating thermoelectric properties of Eu_0.5Ca_0.5Zn₂Sb₂ through Mg dopant

Wenkai Le
, Wenwen Sheng
, Runtao Liu
, Minhui Yuan
, Wenwei Yang
, Jingyi Lv
, Li Yin
, Chen Chen
, Xinyu Wang
, Zongwei Zhang
, Kejia Liu
, Tianchi Wang
, Qian Zhang^*
, Jing Shuai^*

^*Corresponding author for this work

Sun Yat-Sen University
Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

CaAl₂Si₂ structure Zintl compounds are promising thermoelectric materials and have been extensively studied recently. In this study, Eu_0.5Ca_0.5Zn_2-xMg_xSb₂ (0 ≤ x ≤ 0.3) compounds have been prepared by ball milling and spark plasma sintering. Results show that for Eu_0.5Ca_0.5Zn₂Sb₂, ZT has been improved about 20% compared with previously reported thermoelectric properties through the ball milling and hot-pressing preparation process. Moreover, the thermoelectric performance of Eu_0.5Ca_0.5Zn₂Sb₂ can be further increased through Mg substitution. Mg replacing Zn has a strong impact on phonon scattering, resulting in low thermal conductivity. A highest ZT about 1.05 is obtained in the Eu_0.5Ca_0.5Zn_1.8Mg_0.2Sb₂ sample at 773 K. The obtained high thermoelectric performance in our work is comparable with other p-type Zintl thermoelectric materials, and this work provides a reference for the improvement of properties of other CaAl₂Si₂ structure Zintl thermoelectric materials.

Original language	English
Article number	101071
Journal	Materials Today Energy
Volume	28
DOIs	https://doi.org/10.1016/j.mtener.2022.101071
State	Published - Aug 2022
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Mechanical alloying
Thermal conductivity
Thermoelectric materials
ZT
Zintl phase

Access to Document

10.1016/j.mtener.2022.101071

Cite this

@article{d99a78cc0b7046adba506075412fc01b,

title = "Regulating thermoelectric properties of Eu0.5Ca0.5Zn2Sb2 through Mg dopant",

abstract = "CaAl2Si2 structure Zintl compounds are promising thermoelectric materials and have been extensively studied recently. In this study, Eu0.5Ca0.5Zn2-xMgxSb2 (0 ≤ x ≤ 0.3) compounds have been prepared by ball milling and spark plasma sintering. Results show that for Eu0.5Ca0.5Zn2Sb2, ZT has been improved about 20\% compared with previously reported thermoelectric properties through the ball milling and hot-pressing preparation process. Moreover, the thermoelectric performance of Eu0.5Ca0.5Zn2Sb2 can be further increased through Mg substitution. Mg replacing Zn has a strong impact on phonon scattering, resulting in low thermal conductivity. A highest ZT about 1.05 is obtained in the Eu0.5Ca0.5Zn1.8Mg0.2Sb2 sample at 773 K. The obtained high thermoelectric performance in our work is comparable with other p-type Zintl thermoelectric materials, and this work provides a reference for the improvement of properties of other CaAl2Si2 structure Zintl thermoelectric materials.",

keywords = "Mechanical alloying, Thermal conductivity, Thermoelectric materials, ZT, Zintl phase",

author = "Wenkai Le and Wenwen Sheng and Runtao Liu and Minhui Yuan and Wenwei Yang and Jingyi Lv and Li Yin and Chen Chen and Xinyu Wang and Zongwei Zhang and Kejia Liu and Tianchi Wang and Qian Zhang and Jing Shuai",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = aug,

doi = "10.1016/j.mtener.2022.101071",

language = "英语",

volume = "28",

journal = "Materials Today Energy",

issn = "2468-6069",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Regulating thermoelectric properties of Eu0.5Ca0.5Zn2Sb2 through Mg dopant

AU - Le, Wenkai

AU - Sheng, Wenwen

AU - Liu, Runtao

AU - Yuan, Minhui

AU - Yang, Wenwei

AU - Lv, Jingyi

AU - Yin, Li

AU - Chen, Chen

AU - Wang, Xinyu

AU - Zhang, Zongwei

AU - Liu, Kejia

AU - Wang, Tianchi

AU - Zhang, Qian

AU - Shuai, Jing

PY - 2022/8

Y1 - 2022/8

N2 - CaAl2Si2 structure Zintl compounds are promising thermoelectric materials and have been extensively studied recently. In this study, Eu0.5Ca0.5Zn2-xMgxSb2 (0 ≤ x ≤ 0.3) compounds have been prepared by ball milling and spark plasma sintering. Results show that for Eu0.5Ca0.5Zn2Sb2, ZT has been improved about 20% compared with previously reported thermoelectric properties through the ball milling and hot-pressing preparation process. Moreover, the thermoelectric performance of Eu0.5Ca0.5Zn2Sb2 can be further increased through Mg substitution. Mg replacing Zn has a strong impact on phonon scattering, resulting in low thermal conductivity. A highest ZT about 1.05 is obtained in the Eu0.5Ca0.5Zn1.8Mg0.2Sb2 sample at 773 K. The obtained high thermoelectric performance in our work is comparable with other p-type Zintl thermoelectric materials, and this work provides a reference for the improvement of properties of other CaAl2Si2 structure Zintl thermoelectric materials.

AB - CaAl2Si2 structure Zintl compounds are promising thermoelectric materials and have been extensively studied recently. In this study, Eu0.5Ca0.5Zn2-xMgxSb2 (0 ≤ x ≤ 0.3) compounds have been prepared by ball milling and spark plasma sintering. Results show that for Eu0.5Ca0.5Zn2Sb2, ZT has been improved about 20% compared with previously reported thermoelectric properties through the ball milling and hot-pressing preparation process. Moreover, the thermoelectric performance of Eu0.5Ca0.5Zn2Sb2 can be further increased through Mg substitution. Mg replacing Zn has a strong impact on phonon scattering, resulting in low thermal conductivity. A highest ZT about 1.05 is obtained in the Eu0.5Ca0.5Zn1.8Mg0.2Sb2 sample at 773 K. The obtained high thermoelectric performance in our work is comparable with other p-type Zintl thermoelectric materials, and this work provides a reference for the improvement of properties of other CaAl2Si2 structure Zintl thermoelectric materials.

KW - Mechanical alloying

KW - Thermal conductivity

KW - Thermoelectric materials

KW - ZT

KW - Zintl phase

UR - https://www.scopus.com/pages/publications/85133416021

U2 - 10.1016/j.mtener.2022.101071

DO - 10.1016/j.mtener.2022.101071

M3 - 文章

AN - SCOPUS:85133416021

SN - 2468-6069

VL - 28

JO - Materials Today Energy

JF - Materials Today Energy

M1 - 101071

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