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

T.M.W.J. Bandara (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; D.G.N. Karunathilaka ; J.L. Ratnasekera ; L. Ajith de Silva ; A.C. Herath ; Bengt-Erik Mellander (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers))
Ionics (0947-7047). Vol. 23 (2017), 7, p. 1711-1719.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Activation energy, Alumina nano-fillers, Anion conductivity, Composite polymer electrolyte, Dielectric analysis

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Denna post skapades 2017-04-13. Senast ändrad 2017-07-25.
CPL Pubid: 248857


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