Structural, electrical, and electrochemical properties of poly(vinylidene fluoride-co-hexaflouropropylene)/poly(vinyl acetate)-based polymer blend electrolytes for rechargeable magnesium ion batteries

Abstract

An attempt has been made to prepare a new blend polymer electrolytes (BPEs) based on PVdF-co-HFP and PVAc doped with Mg (ClO4)2 by using the solvent-casting technique. The physicochemical properties of the as prepared polymer electrolytes were characterized by XRD, FTIR, SEM, TG/DTA, linear sweep voltammetry (LSV), and cyclic voltammetry (CV). The maximum ionic conductivity value 3.85 × 10−5 S cm−1 has been observed for PVdF-co-HFP (69)-PVAc (23)-Mg (ClO4)2 (8 wt%) system at 30 °C using AC impedance spectroscopic technique. The FTIR analysis confirms the complex formation between the polymers and salts. The TG/DTA studies showed the thermal stability of the film. The polymer electrolyte membrane shows a wide electrochemical stability window, and the temperature dependence of ionic conductivity obeys the Arrhenius rule.