Enhancement of thermoelectric performance in a non-toxic CuInTe2/SnTe coated grain nanocomposite

Junphil Hwang; Minju Lee; Byung Kyu Yu; Mi Kyung Han; Woochul Kim; Jungwon Kim; Rabih Al Rahal Al Orabi; Hongchao Wang; Somnath Acharya; Jiyong Kim; Yingshi Jin; Hwanjoo Park; Sujin Kim; So Hyeon Yang; Sung Jin Kim

doi:10.1039/d1ta02893f

Enhancement of thermoelectric performance in a non-toxic CuInTe₂/SnTe coated grain nanocomposite

Junphil Hwang, Minju Lee, Byung Kyu Yu, Mi Kyung Han, Woochul Kim, Jungwon Kim, Rabih Al Rahal Al Orabi, Hongchao Wang, Somnath Acharya, Jiyong Kim, Yingshi Jin, Hwanjoo Park, Sujin Kim, So Hyeon Yang, Sung Jin Kim

Chemistry & Nanoscience

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

8 Scopus citations

Abstract

A thermoelectric coated grain nanocomposite CuInTe₂/SnTe with eco-friendly elements was synthesized. The nanocomposite contains a coating layer of CuInTe₂and SnO₂at the grain boundaries of the SnTe matrix. The coating layer was synthesized using the cation exchange process considering the hard soft acid base (HSAB) concept, the solubility product, and crystal structure. The CuInTe₂coating layer blocks the low energy carriers of the composite resulting in 40% enhancement of the Seebeck coefficient due to energy filtering. The coherent phonon scattering by the coating layer of CuInTe₂effectively reduces the lattice thermal conductivity to almost the minimum theoretical limit. The thermoelectric figure of merit (zT) for the CuInTe₂/SnTe nanocomposite was as high as 1.68 at 823 K, which is significantly higher than that of bulk SnTe in the mid-temperature range. The averagezTfrom 373 K to 823 K for the nanocomposite was 0.76, which is promising for utilization in industrial application.

Original language	English
Pages (from-to)	14851-14858
Number of pages	8
Journal	Journal of Materials Chemistry A
Volume	9
Issue number	26
DOIs	https://doi.org/10.1039/d1ta02893f
State	Published - 14 Jul 2021

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2018R1A2B2005455). This work was supported by the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (2020R 1A 6C 101B194).

Publisher Copyright:
© The Royal Society of Chemistry 2021.

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10.1039/d1ta02893f

Cite this

@article{ff30a07d93d44ca2b47f30c896c8758a,

title = "Enhancement of thermoelectric performance in a non-toxic CuInTe2/SnTe coated grain nanocomposite",

abstract = "A thermoelectric coated grain nanocomposite CuInTe2/SnTe with eco-friendly elements was synthesized. The nanocomposite contains a coating layer of CuInTe2and SnO2at the grain boundaries of the SnTe matrix. The coating layer was synthesized using the cation exchange process considering the hard soft acid base (HSAB) concept, the solubility product, and crystal structure. The CuInTe2coating layer blocks the low energy carriers of the composite resulting in 40% enhancement of the Seebeck coefficient due to energy filtering. The coherent phonon scattering by the coating layer of CuInTe2effectively reduces the lattice thermal conductivity to almost the minimum theoretical limit. The thermoelectric figure of merit (zT) for the CuInTe2/SnTe nanocomposite was as high as 1.68 at 823 K, which is significantly higher than that of bulk SnTe in the mid-temperature range. The averagezTfrom 373 K to 823 K for the nanocomposite was 0.76, which is promising for utilization in industrial application.",

author = "Junphil Hwang and Minju Lee and Yu, {Byung Kyu} and Han, {Mi Kyung} and Woochul Kim and Jungwon Kim and {Al Rahal Al Orabi}, Rabih and Hongchao Wang and Somnath Acharya and Jiyong Kim and Yingshi Jin and Hwanjoo Park and Sujin Kim and Yang, {So Hyeon} and Kim, {Sung Jin}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2018R1A2B2005455). This work was supported by the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (2020R 1A 6C 101B194). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",

year = "2021",

month = jul,

day = "14",

doi = "10.1039/d1ta02893f",

language = "English",

volume = "9",

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journal = "Journal of Materials Chemistry A",

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TY - JOUR

T1 - Enhancement of thermoelectric performance in a non-toxic CuInTe2/SnTe coated grain nanocomposite

AU - Hwang, Junphil

AU - Lee, Minju

AU - Yu, Byung Kyu

AU - Han, Mi Kyung

AU - Kim, Woochul

AU - Kim, Jungwon

AU - Al Rahal Al Orabi, Rabih

AU - Wang, Hongchao

AU - Acharya, Somnath

AU - Kim, Jiyong

AU - Jin, Yingshi

AU - Park, Hwanjoo

AU - Kim, Sujin

AU - Yang, So Hyeon

AU - Kim, Sung Jin

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2018R1A2B2005455). This work was supported by the Korea Basic Science Institute (National Research Facilities and Equipment Center) grant funded by the Ministry of Education (2020R 1A 6C 101B194). Publisher Copyright: © The Royal Society of Chemistry 2021.

PY - 2021/7/14

Y1 - 2021/7/14

N2 - A thermoelectric coated grain nanocomposite CuInTe2/SnTe with eco-friendly elements was synthesized. The nanocomposite contains a coating layer of CuInTe2and SnO2at the grain boundaries of the SnTe matrix. The coating layer was synthesized using the cation exchange process considering the hard soft acid base (HSAB) concept, the solubility product, and crystal structure. The CuInTe2coating layer blocks the low energy carriers of the composite resulting in 40% enhancement of the Seebeck coefficient due to energy filtering. The coherent phonon scattering by the coating layer of CuInTe2effectively reduces the lattice thermal conductivity to almost the minimum theoretical limit. The thermoelectric figure of merit (zT) for the CuInTe2/SnTe nanocomposite was as high as 1.68 at 823 K, which is significantly higher than that of bulk SnTe in the mid-temperature range. The averagezTfrom 373 K to 823 K for the nanocomposite was 0.76, which is promising for utilization in industrial application.

AB - A thermoelectric coated grain nanocomposite CuInTe2/SnTe with eco-friendly elements was synthesized. The nanocomposite contains a coating layer of CuInTe2and SnO2at the grain boundaries of the SnTe matrix. The coating layer was synthesized using the cation exchange process considering the hard soft acid base (HSAB) concept, the solubility product, and crystal structure. The CuInTe2coating layer blocks the low energy carriers of the composite resulting in 40% enhancement of the Seebeck coefficient due to energy filtering. The coherent phonon scattering by the coating layer of CuInTe2effectively reduces the lattice thermal conductivity to almost the minimum theoretical limit. The thermoelectric figure of merit (zT) for the CuInTe2/SnTe nanocomposite was as high as 1.68 at 823 K, which is significantly higher than that of bulk SnTe in the mid-temperature range. The averagezTfrom 373 K to 823 K for the nanocomposite was 0.76, which is promising for utilization in industrial application.

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