Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (11): 1249-1254.DOI: 10.15541/jim20160118

• Orginal Article • Previous Articles     Next Articles

PPP Addition to Improve Thermoelectric Properties of ZnO-based Thermoelectric Composites

WU Zi-Hua, XIE Hua-Qing, WANG Yuan-Yuan, MAO Jian-Hui, XING Jiao-Jiao, LI Yi-Huai   

  1. (School of Environment and Materials Engineering, College of Engineering, Shanghai Polytechnic University, Shanghai, 201209, China)
  • Received:2016-03-03 Revised:2016-04-21 Published:2016-11-10 Online:2016-10-25
  • About author:WU Zi-Hua. E-mail: wuzihua@
  • Supported by:
    National Science Foundation of China(51590902, 51476095), Program for Professor of Special Appointment (Young Eastern Scholar, QD2015052) at Shanghai Institutions of Higher Learning


PPP@Zn1-xCoxO (x=0, 0.025) nanocomposites were prepared by Sol-Gel method, then bulk samples were prepared by spark plasma sintering. And thermoelectric properties of the samples were studied. Transmission electron microscopy (TEM) observations indicate that PPP nanoparticles are smaller than 200 nm. With the increase of PPP content, Seebeck coefficient gradually increases at first and then decreases, while electric conductivity increases quickly. Compared with ZnO bulk samples, the thermal conductivity of PPP@Zn1-xCoxO nanocomposite is decreased. The thermal conductivity of 9wt% PPP@Zn0.975Co0.025O is decreased to 5.4 W/(m·K) at 640 K. The increase of electrical conductivity and the decrease of thermal conductivity resulted in a great increase in the value of thermoelectric properties. 9wt% PPP@Zn0.975Co0.025O has a maximal ZT value of 0.16 at 870 K, which is 8 times of that of Zn0.975Co0.025O bulk material.

Key words: ZnO, thermoelectric property, Sol-Gel, molecular junction

CLC Number: