An unusual conductivity enhancement occurs in PEO‐based ZnBr2/LiBr electrolytes of composition, [xZnBr2 + (1 − x)LiBr](PEO)16 with x = 0.00, 0.05, 0.50, 0.75, 1.00. The conductivity of the mixed‐salt electrolytes is higher than that of either pure salt electrolyte. The highest conductivity, observed for x = 0.5, is two orders of magnitude higher than that of pure LiBr(PEO)16 and one order higher than ZnBr2(PEO)16. In contrast, the conductivity of mixed Mg (CIO4)2/LiCIO4 electrolytes, [xMg(CIO4)2 + (1 − x) LiCIO4](PEO)16 where x = 0.00, 0.20, 0.50, 0.80, 1.00, increases monotonically with the mole fraction of the higher conductivity component, LiCIO4(PEO)16. The conductivity and differential scanning calorimetry (DSC) results suggest that the conductivity enhancement in the ZnBr2/LiBr electrolytes results from a change in charge carrier type and concentration, whereas the conductivity change in the Mg(CIO4)2/LiCIO4 electrolytes arises from a change in the microscopic viscosity of the electrolytes. © 1993 John Wiley & Sons, Inc. Copyright © 1993 John Wiley & Sons, Inc.
|Journal||Journal of Polymer Science Part B: Polymer Physics|
|Publication status||Published - 1993|