Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites

Kwang Min Choi; Eunsil Lee; Jieun Ko; Jong Young Kim; Soonil Lee; Won Seon Seo; Soon Mok Choi; Kyu Hyoung Lee; Seung Joo Kimk

doi:10.1002/bkcs.10760

Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites

Kwang Min Choi, Eunsil Lee, Jieun Ko, Jong Young Kim, Soonil Lee, Won Seon Seo, Soon Mok Choi, Kyu Hyoung Lee, Seung Joo Kimk

Department of Materials Science and Engineering

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

Abstract

We have successfully synthesized the composites of Ag-doped zinc antimonide (Ag-ZnSb) and few-layergraphene (FLG) by high-energy-mechanical milling and spark plasma sintering using Ag-ZnSb ingot and FLG as raw materials. The FLG/Ag-ZnSb shows 22%-reduced lattice thermal conductivity by increased phonon boundary scattering due to embedded FLG. The electrical conductivity of the composites was decreased due to reduced carrier concentration, while the Seebeck coefficient of the composites was increased by electron donating effect of FLG. The maximum figure of merit, ZT, of 0.86 was observed at 630 K. The peak ZT temperature in the FLG/Ag-ZnSb cases (∼630 K) were higher than the pristine Ag-ZnSb compound (∼580 K) resulting in advantages for the higher temperature power generation.

Original language	English
Pages (from-to)	720-724
Number of pages	5
Journal	Bulletin of the Korean Chemical Society
Volume	37
Issue number	5
DOIs	https://doi.org/10.1002/bkcs.10760
Publication status	Published - 2016 May 1

Bibliographical note

Publisher Copyright:
© 2016 Korean Chemical Society, Seoul and Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim.

All Science Journal Classification (ASJC) codes

Chemistry(all)

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10.1002/bkcs.10760

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title = "Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites",

abstract = "We have successfully synthesized the composites of Ag-doped zinc antimonide (Ag-ZnSb) and few-layergraphene (FLG) by high-energy-mechanical milling and spark plasma sintering using Ag-ZnSb ingot and FLG as raw materials. The FLG/Ag-ZnSb shows 22%-reduced lattice thermal conductivity by increased phonon boundary scattering due to embedded FLG. The electrical conductivity of the composites was decreased due to reduced carrier concentration, while the Seebeck coefficient of the composites was increased by electron donating effect of FLG. The maximum figure of merit, ZT, of 0.86 was observed at 630 K. The peak ZT temperature in the FLG/Ag-ZnSb cases (∼630 K) were higher than the pristine Ag-ZnSb compound (∼580 K) resulting in advantages for the higher temperature power generation.",

author = "Choi, {Kwang Min} and Eunsil Lee and Jieun Ko and Kim, {Jong Young} and Soonil Lee and Seo, {Won Seon} and Choi, {Soon Mok} and Lee, {Kyu Hyoung} and Kimk, {Seung Joo}",

note = "Publisher Copyright: {\textcopyright} 2016 Korean Chemical Society, Seoul and Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim.",

year = "2016",

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doi = "10.1002/bkcs.10760",

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T1 - Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites

AU - Choi, Kwang Min

AU - Lee, Eunsil

AU - Ko, Jieun

AU - Kim, Jong Young

AU - Lee, Soonil

AU - Seo, Won Seon

AU - Choi, Soon Mok

AU - Lee, Kyu Hyoung

AU - Kimk, Seung Joo

PY - 2016/5/1

Y1 - 2016/5/1

N2 - We have successfully synthesized the composites of Ag-doped zinc antimonide (Ag-ZnSb) and few-layergraphene (FLG) by high-energy-mechanical milling and spark plasma sintering using Ag-ZnSb ingot and FLG as raw materials. The FLG/Ag-ZnSb shows 22%-reduced lattice thermal conductivity by increased phonon boundary scattering due to embedded FLG. The electrical conductivity of the composites was decreased due to reduced carrier concentration, while the Seebeck coefficient of the composites was increased by electron donating effect of FLG. The maximum figure of merit, ZT, of 0.86 was observed at 630 K. The peak ZT temperature in the FLG/Ag-ZnSb cases (∼630 K) were higher than the pristine Ag-ZnSb compound (∼580 K) resulting in advantages for the higher temperature power generation.

AB - We have successfully synthesized the composites of Ag-doped zinc antimonide (Ag-ZnSb) and few-layergraphene (FLG) by high-energy-mechanical milling and spark plasma sintering using Ag-ZnSb ingot and FLG as raw materials. The FLG/Ag-ZnSb shows 22%-reduced lattice thermal conductivity by increased phonon boundary scattering due to embedded FLG. The electrical conductivity of the composites was decreased due to reduced carrier concentration, while the Seebeck coefficient of the composites was increased by electron donating effect of FLG. The maximum figure of merit, ZT, of 0.86 was observed at 630 K. The peak ZT temperature in the FLG/Ag-ZnSb cases (∼630 K) were higher than the pristine Ag-ZnSb compound (∼580 K) resulting in advantages for the higher temperature power generation.

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JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 5

ER -

Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites

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