Abstract. Solid polymer electrolyte films based on poly (ethylene oxide) PEO complcxed with NaCIO3 have been prepared by a solution-cast technique. The solvation of Na § ion with PEO is confirmed by XRD and IR studies. Measurements of the a.c. conductivity in the temperature range 308 -378 K and the transference numbers have been carried out to investigate the charge transport in this polymer electrolyte system. Transport number data show that the charge transport in this polymer electrolyte system is predominantly due to ions. The highest conductivity (2.12.10 .4 S/cm) has been observed for the 70:30 composition. Using the polymer electrolyte solid state electrochemical ceils have been fabricated. The various cell parameters are evaluated and reported.
Abstract. A new ion conducting solid polymer electrolyte thin film based on Polyethylene oxide (PEO) with NaCIO3 salt is prepared by solution-casting method. The solvation of salt with PEO has been confirmed by X-ray diffraction and IR spectral studies. Plasticizer effects were studied in PEO:NaCIO3 system by using low molecular weight polyethylene glycol (PEG), dimethyl formamide (DMF) and propylcne carbonate(PC). AC conductivity in the temperature range (308-378 K) was measured to evaluate the conductivity of the polymer electrolytes. From the conductivity data, it was found that the conductivity value of pure PEO increases 102-10 ~ order of magnitude with the addition of salts as well as plasticizers. From the transference number experiments, it was confirmed that the charge transport in these electrolyte is mainly due to the ions (t~,,n ---0.94). Finally, the conductivity value of all PEO: NaC103 systems were compared.
The molecular structure of the title compound, C21H18O4, consists of a 3,4-dimethoxyphenyl ring and a naphthalene ring system linked via a prop-2-en-1-one spacer. The molecule is almost planar, with a dihedral angle between the benzene ring and the naphthalene ring system of 2.68 (12)°. There is an intramolecular O—H⋯O hydrogen bond involving the adjacent hydroxy and carbonyl groups. The molecule has an E conformation about the C=C bond and the carbonyl group is syn with respect to the C=C bond. In the crystal, molecules are linked by bifurcated C—H⋯(O,O) hydrogen bonds, enclosing an R
2
1(6) ring motif, and by a further C—H⋯O hydrogen bond, forming undulating sheets extending in b- and c-axis directions. There are π–π interactions between the sheets, involving inversion-related naphthalene and benzene rings [intercentroid distance = 3.7452 (17) Å], forming a three-dimensional structure.
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