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Solid-polymer-blend electrolyte consisting of chitosan and polyethylene oxide (PEO) in a 1:1 weight ratio and doped with lithium trifluoromethanesulfonimide (LiTFSI) salt was prepared by solution cast technique. The highest conducting film with conductivity value of 1.40×10 -6 S cm −1 at room temperature consists of 30 wt% LiTFSI. The temperature dependence for the highest conducting film obeyed Arrhenius relationship. From loss tangent-frequency plots at different temperatures, the frequency f max at which the plot is a maximum was obtained. From this, ln f max vs 10 3 /T was plotted. The activation energy value obtained from the log σ vs 10 3 /T plot and ln f max vs 10 3 /T plot is about the same, suggesting that the processes of conductivity and relaxation for the charge carriers are the same.

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