The effect of the geikeilite (MgTiO3) nanofiller concentration in PVdF-HFP/PVAc–based polymer blend electrolytes for magnesium ion battery

Magnesium ion–conducting polymer electrolyte is one of the necessary components of current rechargeable magnesium batteries because of its good interfacial contact with electrodes and efficient mechanical properties. In the recent analysis, we described synthesis and characterization of a composite polymer electrolyte (CPE) based on poly (vinylidene fluoride-co-hexafluoro propylene)/poly vinyl acetate, salt as magnesium perchlorate, and various weight percentages (wt %) of geikeilite filler (MgTiO3) by the solution casting method with tetrahydrofuran as a solvent. Structural analysis, Thermogravimetric analysis (TGA), complex impedance spectroscopy, ionic transference number analysis, linear sweep voltammetry (LSV) and cyclic voltammetry (CV) studies exhibit promising characteristics of prepared CPEs for appropriate utilization in magnesium battery application. The CPEs display high thermal constancy, high ionic conductivity (~ 5.80 × 10−3 Scm−1 at 30 °C), high magnesium transference number (= 0.34) and high electrochemical stability window. Dielectric properties of polymer films are analyzed and discussed. The electrochemical stability of 1.4 V and 2.4 V was get for 6 wt% incorporated MgTiO3 nanofiller system R3 polymer electrolytes, respectively, utilizing linear sweep voltammetry, cyclic voltammetry, and charge-discharge characteristics. The prepared CPE is expected to be a promising electrolyte candidate for magnesium battery utilization.