Prototype System for Magnesium/TiO₂ Anatase Batteries

摘要

In this work, a new polymer composite electrolyte films PCE are prepared based on poly(vinylalcohol) (PVA), magnesium bromide MgBr2, phosphomolbidic acid (PMA), and tetraethylene glycoldimethyl ether (TEGDME) using solution cast technique. The XRD are used to determine thecomplexation of the PVA polymer with Mg acid salt. The ionic conductivity of the composite films aredetermined by the complex impedance measurements in the temperature range 29375 K. The ionicconductivity measurements revealed that the ionic conductivity of the electrolyte varies with the-6 -1 TEGDME concentration to reach the highest conductivity value of 10 S. cm at 303 K. The+ conductivity seems to follow the universal power law. The estimated value of Mg ion transferencenumber is carried out by the combination of complex impedance and D.C. polarization methods and isfound to be 0.4 for high conducting film. A solid state battery based on the above polymer electrolytewith a configuration Mg|PCE|TiO2 anatase has exhibited an open circuit voltage of 1.5 V. Thedischarge characteristics are found to be satisfactory as a laboratory cell.