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Enhanced Thermoelectric Performance of Bi2O2Se with Ag Addition

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Author to whom correspondence should be addressed.
Academic Editors: Kunihito Koumoto and Chunlei Wan
Materials 2015, 8(4), 1568-1576;
Received: 9 February 2015 / Revised: 5 March 2015 / Accepted: 6 March 2015 / Published: 1 April 2015
(This article belongs to the Special Issue Low-Dimensional Anisotropic Thermoelectrics)
Polycrystalline Bi2O2Se/Ag nanocomposites were synthesized by spark plasma sintering process. Their thermoelectric properties were evaluated from 300 to 673 K. With the addition of silver, the conductive second phase Ag2Se and Ag can be observed, which results in a significant enhancement of electrical conductivity. The maximum conductivity is 691.8 S cm−1 for Bi2O2Se/20 vol.% Ag, which increased nearly 500 higher times than the pure Bi2O2Se bulk. ZT value can be enhanced greatly, ~0.07, for Bi2O2Se/5 vol.% Ag at 673 K, which is two times larger than the pure sample. View Full-Text
Keywords: Bi2O2Se; thermoelectric; spark plasma sintering; Ag addition Bi2O2Se; thermoelectric; spark plasma sintering; Ag addition
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Zhan, B.; Liu, Y.; Lan, J.; Zeng, C.; Lin, Y.-H.; Nan, C.-W. Enhanced Thermoelectric Performance of Bi2O2Se with Ag Addition. Materials 2015, 8, 1568-1576.

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