High thermoelectric energy conversion efficiency of a unicouple of n-type Mg3Bi2 and p-type Bi2Te3

Z. Liang; C. Xu; H. Shang; Q. Zhu; F. Ding; J. Mao; Z. Ren

doi:10.1016/j.mtphys.2021.100413

High thermoelectric energy conversion efficiency of a unicouple of n-type Mg₃Bi₂ and p-type Bi₂Te₃

Z. Liang
, C. Xu
, H. Shang
, Q. Zhu
, F. Ding
, J. Mao^*
, Z. Ren^*

^*Corresponding author for this work

University of Houston
CAS - Institute of Electrical Engineering

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

111 Scopus citations

Abstract

Low-grade heat harvesting by thermoelectric technology can contribute to efficient energy utilization. However, the large-scale application of thermoelectric devices is partially hindered by their unsatisfactory performance and relatively high cost. Here we prepared a cost-effective n-type Mg₃Bi₂-based compound with a peak zT of 1.24 at 573 K. A unicouple comprised of n-type Mg_3.2Bi_1.29Sb_0.7Te_0.01 and p-type Bi_0.2Sb_1.8Te₃ was constructed and its energy conversion efficiency was evaluated. The unicouple exhibited a record-high efficiency of (9.0 ± 0.5)% or (8.3 ± 0.4)% [considering the radiation heat loss] under a temperature difference of 265 K at the hot-side temperature of 573 K. Our results demonstrate the great potential of Mg₃Bi₂-based materials for low-grade heat recovery.

Original language	English
Article number	100413
Journal	Materials Today Physics
Volume	19
DOIs	https://doi.org/10.1016/j.mtphys.2021.100413
State	Published - Jul 2021
Externally published	Yes

Keywords

Contact resistance
Energy conversion efficiency
Low-grade heat recovery
Mg3Bi2-based materials

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10.1016/j.mtphys.2021.100413

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title = "High thermoelectric energy conversion efficiency of a unicouple of n-type Mg3Bi2 and p-type Bi2Te3",

abstract = "Low-grade heat harvesting by thermoelectric technology can contribute to efficient energy utilization. However, the large-scale application of thermoelectric devices is partially hindered by their unsatisfactory performance and relatively high cost. Here we prepared a cost-effective n-type Mg3Bi2-based compound with a peak zT of 1.24 at 573 K. A unicouple comprised of n-type Mg3.2Bi1.29Sb0.7Te0.01 and p-type Bi0.2Sb1.8Te3 was constructed and its energy conversion efficiency was evaluated. The unicouple exhibited a record-high efficiency of (9.0 ± 0.5)\% or (8.3 ± 0.4)\% [considering the radiation heat loss] under a temperature difference of 265 K at the hot-side temperature of 573 K. Our results demonstrate the great potential of Mg3Bi2-based materials for low-grade heat recovery.",

keywords = "Contact resistance, Energy conversion efficiency, Low-grade heat recovery, Mg3Bi2-based materials",

author = "Z. Liang and C. Xu and H. Shang and Q. Zhu and F. Ding and J. Mao and Z. Ren",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = jul,

doi = "10.1016/j.mtphys.2021.100413",

language = "英语",

volume = "19",

journal = "Materials Today Physics",

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TY - JOUR

T1 - High thermoelectric energy conversion efficiency of a unicouple of n-type Mg3Bi2 and p-type Bi2Te3

AU - Liang, Z.

AU - Xu, C.

AU - Shang, H.

AU - Zhu, Q.

AU - Ding, F.

AU - Mao, J.

AU - Ren, Z.

PY - 2021/7

Y1 - 2021/7

N2 - Low-grade heat harvesting by thermoelectric technology can contribute to efficient energy utilization. However, the large-scale application of thermoelectric devices is partially hindered by their unsatisfactory performance and relatively high cost. Here we prepared a cost-effective n-type Mg3Bi2-based compound with a peak zT of 1.24 at 573 K. A unicouple comprised of n-type Mg3.2Bi1.29Sb0.7Te0.01 and p-type Bi0.2Sb1.8Te3 was constructed and its energy conversion efficiency was evaluated. The unicouple exhibited a record-high efficiency of (9.0 ± 0.5)% or (8.3 ± 0.4)% [considering the radiation heat loss] under a temperature difference of 265 K at the hot-side temperature of 573 K. Our results demonstrate the great potential of Mg3Bi2-based materials for low-grade heat recovery.

AB - Low-grade heat harvesting by thermoelectric technology can contribute to efficient energy utilization. However, the large-scale application of thermoelectric devices is partially hindered by their unsatisfactory performance and relatively high cost. Here we prepared a cost-effective n-type Mg3Bi2-based compound with a peak zT of 1.24 at 573 K. A unicouple comprised of n-type Mg3.2Bi1.29Sb0.7Te0.01 and p-type Bi0.2Sb1.8Te3 was constructed and its energy conversion efficiency was evaluated. The unicouple exhibited a record-high efficiency of (9.0 ± 0.5)% or (8.3 ± 0.4)% [considering the radiation heat loss] under a temperature difference of 265 K at the hot-side temperature of 573 K. Our results demonstrate the great potential of Mg3Bi2-based materials for low-grade heat recovery.

KW - Contact resistance

KW - Energy conversion efficiency

KW - Low-grade heat recovery

KW - Mg3Bi2-based materials

UR - https://www.scopus.com/pages/publications/85104717862

U2 - 10.1016/j.mtphys.2021.100413

DO - 10.1016/j.mtphys.2021.100413

M3 - 文章

AN - SCOPUS:85104717862

SN - 2542-5293

VL - 19

JO - Materials Today Physics

JF - Materials Today Physics

M1 - 100413

ER -

High thermoelectric energy conversion efficiency of a unicouple of n-type Mg₃Bi₂ and p-type Bi₂Te₃

Abstract

Keywords

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