Effect of filler on ethylene carbonate-plasticized hexanoyl chitosan-based polymer electrolytes / Mohd Hazarul Hasnain Mat Nor

In this study, composite polymer electrolytes were prepared using solution casting technique. Hexanoyl chitosan, ethylene carbonate, EC, lithium trifluoromethanesulfonate (LiCF3SC3) and aluminium oxide, AI2O3 were used as the polymer host, plasticizer, doping salt and filler, respectively. In order to study the effect of filler, various amount of AI2O3 was added ranging from 0.5 wt% to 2.5 wt%. The maximum conductivity achieved is 1.83 x 10"4 Scm"1 with addition of 2 wt% AI2O3. The temperature dependence conductivity of the sample is Arrhenius in behavior, suggesting that the conductivity is thermally activated. Sample with high conductivity value exhibit high value of dielectric constant is the measurement of stored lithium ions in the sample, thus sample with high value of conductivity could be attributed to the presence of higher number of free ions. FTIR studies suggested that interaction has occurred among components in hexanoyl chitosan-EC-LiCF3S03-AL203 electrolytes system.