ABSTRACT The magnesium triflate with PEG plasticized tapioca starch (TS) in different weight ratios with Poly vinyl chloride (PVC) blended membranes obtained via solution casting technique are studied with XRD, FTIR, TGADTA, Impedance, Linear Sweep Voltammetry (LSV), and Wagner's DC polarization technique (WDCPT). The XRD profile shows the crystalline as well as amorphous phase of the as‐synthesized membranes, and FTIR studies reveal the strong molecular interactions in the fingerprint region. The thermal studies reveal the degradation of PVC and TS around 250°C–300°C. The impedance study presents a higher order of conductivity 10 −5 S cm −1 for PVC:TS 1:1 ratio (SA2), revealing higher mobility of Mg 2+ ions and polarizability. The temperature‐dependent conductivity studies demonstrated an increase in ionic conductivity reaching a maximum of 1.272 × 10 −3 S cm −1 for 1:1 ratio (SA2). The dielectric studies reveal space‐charge polarization effect at the electrode‐electrolyte interface owing to the molecular domain concentration of the reacting groups prevalent both in PVC (Cl − ) and the abundance of hydroxyl in TS. The WDCPT shows the ion transference number of 0.99%, and the LSV demonstrated the voltage window stability of 0–2.44 V for SA2. The primary battery fabrication using SA2 membrane by sandwiching it between Mg anode and (MnO 2 + graphite + SA2) cathode displayed the open circuit voltage of 1.88 V and after connecting to 470 kΩ load sustains discharge profile up to 96 h and elucidates that the adhered SA2 electrolyte cum separator may well be amenable for utility in real‐time Mg ion primary battery applications.
Abirami et al. (Sun,) studied this question.