Abstract
A series of polymer electrolytes, PEO 9Zn 1 − x Cu x (CF 3SO 3) 2, where PEO is poly(ethylene oxide) and x varied between 0.0 and 1.0, was investigated by differential scanning calorimetry, complex impedance analysis and electron paramagnetic resonance (EPR) spectroscopy. The mixed cation complexes show no evidence of a crystalline phase, and a prominent conductivity maximum occurs at the 50/50 Zn/Cu composition. The conductivity maximum does not correspond to the sample with the lowest glass transition temperature, nor is it correlated with local Cu 2+ motions probed by EPR. These results, along with preliminary transference number determinations, suggest that the CF 3SO − 3 ions are the dominant charge carriers.
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