Eur. Phys. J. Appl. Phys.
Volume 69, Number 3, March 2015
|Number of page(s)||5|
|Section||Physics of Energy Transfer, Conversion and Storage|
|Published online||12 March 2015|
Electronic thermal conductivity, thermoelectric properties and supercapacitive behaviour of conjugated polymer nanocomposite (polyaniline-WO3) thin film
Department of Physics and Astronomy, University of Nigeria, 40001
2 National Centre for Energy Research and Development, University of Nigeria, 40001 Nsukka, Nigeria
3 UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology, College of Graduate Studies,University of South Africa (UNISA), Muckleneuk Ridge, PO Box 392, Pretoria, South Africa
4 Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, Somerset West 7129, PO Box 722, Somerset West, Western Cape Province, South Africa
a e-mail: firstname.lastname@example.org
Revised: 31 January 2015
Accepted: 13 February 2015
Published online: 12 March 2015
A facile two-step, binder-free, chemical bath deposition (CBD) method was successfully employed in the synthesis of WO3 nanograins onto the matrix of conjugated polymer (polyaniline). The X-ray diffraction (XRD) results showed that the nanocomposite retained monoclinic phase of WO3 even when dispersed in polyaniline matrix. Owing to the synergistic effect offered by both the nanocomposite and structured metal oxide which may enhance the surface area, polyaniline-WO3 nanocomposite exhibited good specific capacitance. Polyaniline-WO3 yielded maximum specific capacitance ~96 F/g at scan rate of 5 mV/s in 0.5 M H2SO4 electrolyte. With the electronic thermal conductivity showing strong dependence on temperature, the estimated dimensionless figure of merit zT ~ 10−3 shows that the polymer nanocomposite (PNC) is promising as a new type of thermoelectric material. The electrochemical impedance spectroscopy showed that the PNC exhibited both pseudocapacitive and electric double layer capacitance behaviour.
© EDP Sciences, 2015
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