The effect of LiCF3SO3 on the complexation with potato starch-chitosan blend polymer electrolytes

摘要

This work examines the effect of lithium trifluoromethanesulfonate (LiCF3SO3) and glycerol on the conductivity and dielectric properties of potato starch-chitosan blend-based electrolytes. The electrolytes are prepared via solution cast technique. From X-ray diffraction (XRD) analysis, the blend of 50 wt.% starch and 50 wt.% chitosan is found to be the most amorphous blend. Fourier transform infrared (FTIR) spectroscopy studies show the interaction between the electrolyte materials. The room temperature conductivity of pure starch-chitosan film is found to be (2.85 +/- 1.31) x 10(-10) S cm(-1). The incorporation of 45 wt.% LiCF3SO3 increases the conductivity to (7.65 +/- 2.27) x 10(-5) S cm(-1). Further conductivity enhancement up to (1.32 +/- 0.35) x 10(-3) S cm(-1) has been observed on addition of 30 wt.% glycerol. This trend in conductivity is verified by XRD and dielectric analysis. The temperature dependence of conductivity of all electrolytes are Arrhenian.