Abstract: Ionic conductivity behavior of complexes obtained from high molecular weight polyoxy-ethylene (PEO) and NaCNS or KCNS has been studied.The results showed that the comp-lexes at EO/metal ratio > 4 exhibited a knee in the Arrhenius plot of conductivity vs tem-perature. At EO/NaCNS = 20, conductivity at 25℃ approached 2.8 ×10^-6Ω^-1cm^-1, which ishigher than those at EO/NaCNS = 4 or 50. For complexes of PEO with KCNS the condue-tivity at 25℃ reached 2 ×10^-5Ω^-1cm^-1 at EO/KCNS = 20, while at EO/KCNS = 4 the condu-ctivity obeyed the Arrhenius equation at the temperature ranging from 20 to 90 ℃. Addi-tion of γ-butyrolactone evidently increases the conductivity of the complex.

Key words: Polymeric solid electrolyee, Polyether complex with thiocyanate, Polyoxyethylene