Enhanced thermoelectric performance of TiO2-based hybrid materials by incorporating conducting polymer

doi:10.1088/1674-1056/24/3/034402

Abstract In order to study the thermoelectric properties of TiO₂-based hybrid materials, TiO₂/polyparaphenylene (PPP) nanocomposites are fabricated by spark plasma sintering (SPS). The results show that the electrical conductivity follow percolation theory is enhanced due to the electron transfer highway provided by the conducting PPP phase. Furthermore, the thermal conductivity is reduced due to the drastic difference of vibrational spectra between organic and inorganic components. As a result, the greatest ZT=0.24 is obtained for TiO₂/0.75 wt% PPP sample, which is 15-fold higher than pure TiO₂ (ZT=0.016).

Keywords: thermoelectric TiO₂ polyparaphenylene (PPP)

Received: 02 July 2014
Revised: 15 October 2014
Accepted manuscript online:

PACS:	74.25.fg	(Thermoelectric effects)
	74.25.fc	(Electric and thermal conductivity)
	81.10.-h	(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51206103), the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 13YZ128), the Opening Project of CAS Key Laboratory of Materials for Energy Conversion, China, and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher learning, China.

Corresponding Authors: Xie Hua-Qing
E-mail: hqxie@eed.sspu.cn

Cite this article:

Wu Zi-Hua (吴子华), Xie Hua-Qing (谢华清), Zhai Yong-Biao (翟永彪), Gan Liang-Hua (甘良华), Liu Jun (刘俊) Enhanced thermoelectric performance of TiO₂-based hybrid materials by incorporating conducting polymer 2015 Chin. Phys. B 24 034402

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