Ionic conductance of polymeric electrolytes consisting of magnesium salts dissolved in cross-linked polymer matrix with linear polyether

A novel polymeric electrolyte system has been developed using oligo(ethylen e oxide)-grafted polymethacrylate matrix and linear polyether which dissolv es magnesium salts. Thermal analyses showed that the obtained polymeric ele ctrolytes have homogeneous and amorphous phases over a wide temperature ran ge. The ionic structure of the polymeric system was examined by Raman spect roscopy. The ionic conductance behavior of the polymeric electrolyte was in vestigated as solid Mg2 + -ion conductors. The conductivity depended mostly on the kind of the dissolved magnesium salt. The highest conductivity was obtained for the polymeric electrolytes containing Mg[(CF3SO3),N](2) (about 10 (- 4) S cm (- 1) at room temperature). Addition of dimethyl formamide a s a complex-forming liquid component in the polymeric electrolyte system en hanced the ionic conductivity. The de polarization of an Mg/Mg cell using t he polymeric electrolyte proved that Mg2+ is mobile in the present polymeri c system. (C) 2001 Elsevier Science Ltd. All rights reserved.