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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)720-724
Number of pages5
JournalBulletin of the Korean Chemical Society
Volume37
Issue number5
DOIs
Publication statusPublished - 2016 May 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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    Choi, K. M., Lee, E., Ko, J., Kim, J. Y., Lee, S., Seo, W. S., Choi, S. M., Lee, K. H., & Kimk, S. J. (2016). Thermoelectric property of Ag-doped ZnSb/few-layer-graphene composites. Bulletin of the Korean Chemical Society, 37(5), 720-724. https://doi.org/10.1002/bkcs.10760