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Anji Reddy Polu,Ranveer Kumar,Valerio Causin,Ramesh Neppalli 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.1
Solid polymer electrolytes based on poly (ethylene glycol) (PEG) doped with Mg(CH_3COO)_2 have been prepared by using the solution-casting method. The X-ray diffraction patterns of PEG with Mg(CH_3COO)_2 salt indicated a decrease in the degree of crystallinity with increasing concentration of the salt. The complexation of Mg(CH_3COO)_2 salt with the polymer was confirmed by using Fourier transform infrared spectroscopy (FTIR) studies. The ionic conductivity was measured for the [PEG: Mg(CH_3COO)_2] system in the frequency range 50 Hz - 1 MHz. The addition of Mg salt was found to improve the ionic conductivity significantly. The 15-wt-% Mg(CH_3COO)_2-doped system had a maximum conductivity of 1.07 ?10^(−6) S/cm at 303 K. The conductance spectrum shows two distinct regions: a dc plateau and a dispersive region. The temperature dependence of the ionic conductivity reveals the conduction mechanism to be an Arrhenius-type thermally activated process.