Abstract
In searching for solutions to reduce battery weight for military applications, films of composite polymer electrolytes comprised of hexanoyl chitosan/polystyrene containing lithium trifluoromethanesulfonate (LiCF 3 SO 3 ) and titanium oxide were prepared using solution casting technique. Two types of TiO 2 filler were used, which are untreated TiO 2 and HNO 3 -treated TiO 2 . The effect of untreated and HNO 3 -treated TiO 2 on the structural and electrical behavior of the prepared electrolyte systems has been investigated by using X-ray diffraction and impedance spectroscopy, respectively. The ac conductivity was calculated using σ(ω) = σ dc + Aω s formula in the temperature range from 283 K to 353 K. The conduction mechanism of the H-chitosan/PS-LiCF 3 SO 3 -TiO 2 and H-chitosan/PS-LiCF 3 SO 3 -HNO 3 -treated TiO 2 can be interpreted based on the correlated barrier hoping model at 4 and 6 wt.% of TiO 2 respectively.
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