Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide
Journal article, 2017

In this study, the electrical, dielectric and morphological analysis of composite solid polymer electrolytes containing polyethylene oxide, alumina nano-fillers and tetrapropylammonium iodide are conducted. The temperature dependence of conductivity shows activation energy of 0.23, 0.20 and 0.29 eV for electrolytes containing 0, 5 and 15 wt.% alumina, respectively, when data fitted to the Arrhenius equation. These activation energy values are in good agreement with those determined from dielectric measurements. The result confirms the fact that conductivity is activated by both the mobility and the charge carrier density. The conductivity isotherms demonstrated the existence of two peaks, at 5 and 15 wt.% Al2O3 composition. The highest conductivity values of 2.4 × 10−4, 3.3 × 10−4 and 4.2 × 10−4 S cm−1 are obtained for the sample with 5 wt.% Al2O3 at 0, 12 and 24 °C, respectively, suggesting an enhancement of conductivity compared with that of alumina free samples.

Anion conductivity

Composite polymer electrolyte

Alumina nano-fillers

Activation energy

Dielectric analysis


T M W J Bandara

Chalmers, Physics, Subatomic and Plasma Physics

D.G.N. Karunathilaka

University of Peradeniya

J.L. Ratnasekera

University of Colombo

L. Ajith de Silva

University of West Georgia

A.C. Herath

University of Colombo

Bengt-Erik Mellander

Chalmers, Physics, Subatomic and Plasma Physics


0947-7047 (ISSN) 18620760 (eISSN)

Vol. 23 7 1711-1719

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