Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Issue 14, 2018
Previous Article Next Article

High-performance thermoelectric materials based on ternary TiO2/CNT/PANI composites

Author affiliations


In the present work, we report the fabrication of high-performance thermoelectric materials using TiO2/CNT/PANI ternary composites. We showed that a conductivity of ∼2730 S cm−1 can be achieved for the binary CNT (70%)/PANI (30%) composite, which is the highest recorded value for the reported CNT/PANI composites. We further demonstrated that the Seebeck coefficient of CNT/PANI composites could be enhanced by incorporating TiO2 nanoparticles into the binary CNT/PANI composites, which could be attributed to lower carrier density and the energy scattering of low-energy carriers at the interfaces of TiO2/a-CNT and TiO2/PANI. The resulting TiO2/a-CNT/PANI ternary system exhibits a higher Seebeck coefficient and enhanced thermoelectric power. Further optimization of the thermoelectric power was achieved by water treatment and by tuning the processing temperature. A high thermoelectric power factor of 114.5 μW mK−2 was obtained for the ternary composite of 30% TiO2/70% (a-CNT (70%)/PANI (30%)), which is the highest reported value among the reported PANI based ternary composites. The improvement of thermoelectric performance by incorporation of TiO2 suggests a promising approach to enhance power factor of organic thermoelectric materials by judicial tuning of the carrier concentration and electrical conductivity.

Graphical abstract: High-performance thermoelectric materials based on ternary TiO2/CNT/PANI composites

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Nov 2017, accepted on 01 Mar 2018 and first published on 01 Mar 2018

Article type: Paper
DOI: 10.1039/C7CP07896J
Citation: Phys. Chem. Chem. Phys., 2018,20, 9411-9418

  •   Request permissions

    High-performance thermoelectric materials based on ternary TiO2/CNT/PANI composites

    F. Erden, H. Li, X. Wang, F. Wang and C. He, Phys. Chem. Chem. Phys., 2018, 20, 9411
    DOI: 10.1039/C7CP07896J

Search articles by author