Abstract:
Solid polymer electrolytes composed of chitosan and PEO as the host polymer and
LiTFSI salt containing EC and PChas been prepared, respectively by the solution cast
technique. These complexes with different amounts of plasticizers were investigated
as possible ionic conducting polymers by using the Electrochemical Impedance
Spectroscopy (EIS). At room temperature, the highest ionic conductivity of the
complexes was observed at 1.06 x 10-4 1 S cm-for 45 wt.% of EC and 3.43 x 10-Scm1for40
wt.% of PC. The ionic conductivity of the polymer blends increase with
increasing the plasticizers concentration could be attributed to the increase in the
number mobile ions as a result of plasticizer dissociation. Dielectric data were5
analyzed using complex permittivity, & · ,, complex electrical modulus, M* and loss
tangent, tan 5. The existences of M1 peaks indicate that the samples are ionic
conductors. Further, the interaction of the polymer chains with the different
plasticizers concentration is substantiated by Fourier Transform Infrared (FTIR)
spectroscopy. The FTIR spectra have found evidence of a complexation for both EC
and PC systems.
