Temperature-dependent ionic conductivity and transport properties of LiClO4-doped PVA/modified cellulose composites

This paper presents the investigation on physicochemical properties and ionic conductivity of LiClO 4 -doped poly(vinyl alcohol) (PVA)/modified cellulose composites. The percolative behaviour of LiClO 4 with dc conductivity ( σ dc ) for different LiClO 4 weight fractions ( p ) related to transport dimensionality was also focused. The highest ionic conductivity of 9.79 × 10 −6 S cm −1 was observed for 20 wt% LiClO 4 doping level at room temperature. The activation energies ( E g ) were estimated using temperature-dependent conductivity, which follows the Arrhenius and Vogel–Tammann–Fulcher (VTF) relation. The dynamic fragility ( f ) and activation energy ( E g ) vs. T g of polymer composites using equivalence of the both Williams–Landel–Ferry (WLF) and VTF equations were also correlated. Transport properties such as travel time of ions between sites ( τ o ), mobility ( μ ), diffusion coefficient ( D ) and number of transitions per unit time P ( E ) for normal cationic (Li + ) hopping process of LiClO 4 -doped PVA/mCellulose composites have been investigated using the Rice and Roth model.