Structural and Optical Properties of Li+: PVP & Ag+: PVP Polymer Films1695
TG-DTA and Impedance Spectral profiles. The dielectric
properties (dielectric constant (
), tan
) of these films
are showing a decreasing trend an increase in the fre-
quency because of the occurrence of space charge po-
larization at the electrode-electrolyte interface. The im-
pedance plots reveal that ionic conductivities of the ref-
erence PVP (1.57 × 10–4 S/cm), Li+: PVP (8.55 × 10–3
S/cm) and Ag+: PVP (1.03 × 10–3 S/cm) polymer films
were calculated from bulk resistance, which varies with
temperature. On comparison of results it is noticed that
Li+: PVP polymer film has shown an enhancement in
conductivity besides its mechanical strength and there-
fore Li+: PVP electrolytes could be found to be more
suitable for their potential applications in the progress of
battery materials and ionic devices.
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