Mg-ion conducting triblock copolymer electrolyte based on poly(VdCl-co-AN-co-MMA) with magnesium nitrate

The solid polymer electrolytes (SPEs) have been prepared using the triblock copolymer, poly(vinylidene chloride-co-acrylonitrile-co-methylmethacrylate) (poly(VdCl-co-AN-co-MMA)) with various concentrations of magnesium nitrate (xMg(NO3)(2)) salt (x = 10%, 20%, 30%, 40%) by solution casting technique. The semi-crystalline/amorphous nature of the pure triblock copolymer and triblock copolymer with various concentrations of magnesium nitrate have been studied by X-ray diffraction analysis. The complexation between the polymer membranes of pure triblock copolymer and triblock copolymer with magnesium salt has been studied using Fourier transform infrared spectrum. The thermal behavior for pure triblock copolymer and triblock copolymer with various concentrations of magnesium nitrate is examined with differential scanning calorimetric studies, and glass transition temperatures have been found. Electrical conductivity of the polymer electrolytes is determined with AC impedance measurements. The highest ionic conductivity at room temperature has been determined as 1.6 x 10(-4) S cm(-1) for 70 wt% poly(VdCl-co-AN-co-MMA):30 wt% Mg(NO3)(2) composition. The dielectric behavior of the polymer electrolytes is also analyzed. The electrochemical stability of the polymer sample is determined by linear sweep voltammetry. The primary magnesium ion battery is fabricated with the prepared electrolyte of highest conductivity, and its characteristics have been studied.