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Vol. 31 No. 5 (2019): Vol 31 Issue 5

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Studies on Composite PVA-CA-NH4CF3SO3-Al2O3 Polymer Electrolyte for Electrochemical Devices

https://doi.org/10.14233/ajchem.2019.21922
S. Gurulakshmi
School of Advanced Sciences, VIT University, Vellore-600127, India; Department of Physics, Guru Nanak College, Chennai-600042, India
https://orcid.org/0000-0002-4470-0071
S. Madeswaran
School of Advanced Sciences, VIT University, Vellore-600127, India
https://orcid.org/0000-0003-1606-1070
S. Karthikeyan
Department of Physics, Madras Christian College, Chennai-600059, India
https://orcid.org/0000-0002-7674-7157
V. Porchezhiyan
Department of Chemistry, Guru Nanak College, Chennai-600042, India

Corresponding Author(s) : S. Madeswaran

madeswarans@gmail.com

Asian Journal of Chemistry, Vol. 31 No. 5 (2019): Vol 31 Issue 5

Abstract

In the present study, polymer electrolyte with poly(vinyl alcohol) (PVA) blended with cellulose acetate (CA) was chosen to prepare composite electrolyte using ammonium triflate salt and nano sized alumina (Al2O3- < 50 nm) by the solution casting method. The as prepared samples were characterized by X-ray diffraction, FT-IR, differential scanning calorimetry and AC impedance spectra. The loss tangent and dielectric studies were carried out for all the prepared samples using AC impedance analysis. Activation energy with regression values and relaxation time were calculated and found to be low for the highest conducting membranes. The presence of 0.1 mol content of nano alumina has enhanced the ionic conductivity significantly to the value of 2.012 × 10-3 S/cm from that of the filler-free electrolyte (2.93 × 10-4 S/cm). Ionic transference number was calculated by electrostatic polarization method and it was found to be 0.9684, which shows the conducting species were ions. A proton battery fabricated using the configuration Zn+ZnSO4. H2O || PVA-CA-0.5 mol NH4CF3SO3-0.1 mol Al2O3 || PbO2 + V2O5 produced a steady state open circuit voltage of 1.39 V, which proves the prepared composite electrolyte is suitable solid electrolyte for electrochemical devices.

Keywords

FT-IR Ionic conductivity Dielectric analysis Poly(vinyl alcohol) Cellulose acetate Ammonium triflate Nano alumina
Gurulakshmi, S., Madeswaran, S., Karthikeyan, S., & Porchezhiyan, V. (2019). Studies on Composite PVA-CA-NH4CF3SO3-Al2O3 Polymer Electrolyte for Electrochemical Devices. Asian Journal of Chemistry, 31(5), 1181–1188. https://doi.org/10.14233/ajchem.2019.21922
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