BiSbTe alloy with high thermoelectric and mechanical performance for power generation

Fengkai Guo; Yuxin Sun; Haixu Qin; Yuke Zhu; Zhenhua Ge; Zihang Liu; Wei Cai; Jiehe Sui

doi:10.1016/j.scriptamat.2022.114801

BiSbTe alloy with high thermoelectric and mechanical performance for power generation

Fengkai Guo
, Yuxin Sun
, Haixu Qin^*
, Yuke Zhu
, Zhenhua Ge
, Zihang Liu
, Wei Cai
, Jiehe Sui

^*Corresponding author for this work

School of Materials Science and Engineering

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

29 Scopus citations

Abstract

The zone-melted Bi₂Te₃ based alloys with excellent near room temperature figure-of-merit have dominated the field of commercial thermoelectric materials for many years. However, the poor mechanical strength restricts their application on the hot emerging miniature TE devices. Herein, we adjust the Bi/Sb ratio of the nanotwins strengthened Te-deficient Bi_0.4Sb_1.6Te_2.98 alloy, obtaining a mechanically robust p-type Bi₂Te₃ based alloy with a high peak zT of 1.33 at 150 °C and an eminent zT_ave of 1.16 over 30 to 250 °C. Then, taking this alloy and Cu_0.01Bi₂Te_2.7Se_0.3 as the p-type and n-type legs respectively, a module possessing high conversion efficiency of ∼4.8% at a temperature difference of 270 °C is fabricated, which paves an effective way to develop robust miniature (Bi, Sb)₂Te₃-based TE devices.

Original language	English
Article number	114801
Journal	Scripta Materialia
Volume	218
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114801
State	Published - Sep 2022

Keywords

BiSbTe alloy
Mechanical properties
Module
Power generation
Thermoelectric

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10.1016/j.scriptamat.2022.114801

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@article{64f9f77481994f33ad1f5f63ebdac9de,

title = "BiSbTe alloy with high thermoelectric and mechanical performance for power generation",

abstract = "The zone-melted Bi2Te3 based alloys with excellent near room temperature figure-of-merit have dominated the field of commercial thermoelectric materials for many years. However, the poor mechanical strength restricts their application on the hot emerging miniature TE devices. Herein, we adjust the Bi/Sb ratio of the nanotwins strengthened Te-deficient Bi0.4Sb1.6Te2.98 alloy, obtaining a mechanically robust p-type Bi2Te3 based alloy with a high peak zT of 1.33 at 150 °C and an eminent zTave of 1.16 over 30 to 250 °C. Then, taking this alloy and Cu0.01Bi2Te2.7Se0.3 as the p-type and n-type legs respectively, a module possessing high conversion efficiency of ∼4.8\% at a temperature difference of 270 °C is fabricated, which paves an effective way to develop robust miniature (Bi, Sb)2Te3-based TE devices.",

keywords = "BiSbTe alloy, Mechanical properties, Module, Power generation, Thermoelectric",

author = "Fengkai Guo and Yuxin Sun and Haixu Qin and Yuke Zhu and Zhenhua Ge and Zihang Liu and Wei Cai and Jiehe Sui",

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

year = "2022",

month = sep,

doi = "10.1016/j.scriptamat.2022.114801",

language = "英语",

volume = "218",

journal = "Scripta Materialia",

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TY - JOUR

T1 - BiSbTe alloy with high thermoelectric and mechanical performance for power generation

AU - Guo, Fengkai

AU - Sun, Yuxin

AU - Qin, Haixu

AU - Zhu, Yuke

AU - Ge, Zhenhua

AU - Liu, Zihang

AU - Cai, Wei

AU - Sui, Jiehe

PY - 2022/9

Y1 - 2022/9

N2 - The zone-melted Bi2Te3 based alloys with excellent near room temperature figure-of-merit have dominated the field of commercial thermoelectric materials for many years. However, the poor mechanical strength restricts their application on the hot emerging miniature TE devices. Herein, we adjust the Bi/Sb ratio of the nanotwins strengthened Te-deficient Bi0.4Sb1.6Te2.98 alloy, obtaining a mechanically robust p-type Bi2Te3 based alloy with a high peak zT of 1.33 at 150 °C and an eminent zTave of 1.16 over 30 to 250 °C. Then, taking this alloy and Cu0.01Bi2Te2.7Se0.3 as the p-type and n-type legs respectively, a module possessing high conversion efficiency of ∼4.8% at a temperature difference of 270 °C is fabricated, which paves an effective way to develop robust miniature (Bi, Sb)2Te3-based TE devices.

AB - The zone-melted Bi2Te3 based alloys with excellent near room temperature figure-of-merit have dominated the field of commercial thermoelectric materials for many years. However, the poor mechanical strength restricts their application on the hot emerging miniature TE devices. Herein, we adjust the Bi/Sb ratio of the nanotwins strengthened Te-deficient Bi0.4Sb1.6Te2.98 alloy, obtaining a mechanically robust p-type Bi2Te3 based alloy with a high peak zT of 1.33 at 150 °C and an eminent zTave of 1.16 over 30 to 250 °C. Then, taking this alloy and Cu0.01Bi2Te2.7Se0.3 as the p-type and n-type legs respectively, a module possessing high conversion efficiency of ∼4.8% at a temperature difference of 270 °C is fabricated, which paves an effective way to develop robust miniature (Bi, Sb)2Te3-based TE devices.

KW - BiSbTe alloy

KW - Mechanical properties

KW - Module

KW - Power generation

KW - Thermoelectric

UR - https://www.scopus.com/pages/publications/85129980304

U2 - 10.1016/j.scriptamat.2022.114801

DO - 10.1016/j.scriptamat.2022.114801

M3 - 文章

AN - SCOPUS:85129980304

SN - 1359-6462

VL - 218

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114801

ER -

BiSbTe alloy with high thermoelectric and mechanical performance for power generation

Abstract

Keywords

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