Synergistic Optimization of Thermoelectric Performance in P-Type Bi 0.48 Sb 1.52 Te 3 /Graphene Composite

Dewen Xie, Jingtao Xu, Guoqiang Liu, Zhu Liu, Hezhu Shao, Xiaojian Tan, Jun Jiang and Haochuan Jiang
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Dewen Xie: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Jingtao Xu: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Guoqiang Liu: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Zhu Liu: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Hezhu Shao: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Xiaojian Tan: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Jun Jiang: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Haochuan Jiang: Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

Energies, 2016, vol. 9, issue 4, 1-9

Abstract: We report the synergistic optimization of the thermoelectric properties in p-type Bi 0.48 Sb 1.52 Te 3 by the additional graphene. Highly dense Bi 0.48 Sb 1.52 Te 3 + graphene (x wt%, x = 0, 0.05, 0.1 and 0.15) composites have been synthesized by zone-melting followed by spark plasma sintering. With the help of scanning electron microscopy, the graphene has been clearly observed at the edge of the grain in the composites. Due to the additional graphene, the composites show an improved power factor of 4.8 × 10 ?3 Wm ?1 K ?2 with modified carrier concentration and suppressed lattice thermal conductivity. Consequently, synergistic optimization in electrical and lattice properties by additional graphene leads to a great improvement in the figure of merit ZT (1.25 at 320 K).

Keywords: Bi 0.48 Sb 1.52 Te 3; graphene; thermoelectrical materials; microstructure; synergistic optimization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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