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Open AccessArticle

Synergistic Optimization of Thermoelectric Performance in P-Type Bi0.48Sb1.52Te3/Graphene Composite

1
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
2
Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Ling Bing Kong
Energies 2016, 9(4), 236; https://doi.org/10.3390/en9040236
Received: 27 January 2016 / Revised: 6 March 2016 / Accepted: 14 March 2016 / Published: 25 March 2016
(This article belongs to the Special Issue Waste Energy Harvesting)
We report the synergistic optimization of the thermoelectric properties in p-type Bi0.48Sb1.52Te3 by the additional graphene. Highly dense Bi0.48Sb1.52Te3 + 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−1K−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). View Full-Text
Keywords: Bi0.48Sb1.52Te3; graphene; thermoelectrical materials; microstructure; synergistic optimization Bi0.48Sb1.52Te3; graphene; thermoelectrical materials; microstructure; synergistic optimization
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MDPI and ACS Style

Xie, D.; Xu, J.; Liu, G.; Liu, Z.; Shao, H.; Tan, X.; Jiang, J.; Jiang, H. Synergistic Optimization of Thermoelectric Performance in P-Type Bi0.48Sb1.52Te3/Graphene Composite. Energies 2016, 9, 236.

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