Enhanced Thermoelectric Performance of Bi2O2Se with Ag Addition

Materials

Bin Zhan⁴  Yaochun Liu¹  Jinle Lan²  Chengcheng Zeng⁴  Yuan-Hua Lin⁴  Ce-Wen Nan⁴  Kunihito Koumoto³ 

[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; E-Mail:;State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; E-Mail:State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;;State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; E-Mails:

关键词: Bi₂O₂Se;    thermoelectric;    spark plasma sintering;    Ag addition;   

DOI  :  10.3390/ma8041568

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.