Development and characterization of cellulose acetate-based Li-ion conducting membrane and its application in energy storage devices

The current investigation involves the preparation of solid biopolymer electrolytes using the Solution Casting method using cellulose acetate with various concentrations of LiClO 4 . The prepared membranes are subjected for X-ray diffraction (XRD) analysis in order to analyze the crystalline/amorphous nature. The complex formation between cellulose acetate and LiClO 4 has been established using the Fourier transform infrared technique (FTIR). The Li-ionic conductivity of the examined membranes is determined through AC Impedance measurement. The membrane, comprising 1 g of cellulose acetate with 0.5 molecular weight percentage (M wt.%) of LiClO 4 , exhibits the highest lithium-ion conductivity among the prepared membranes. The conductivity is determined to be 3.95 × 10 −3 S cm −1 . The glass transition temperature of the prepared membranes is determined using Differential scanning calorimetry (DSC), while their thermal stability is analyzed through Thermo gravimetric analysis (TGA). The electrochemical stability of the highest conducting membrane has been analyzed using Linear sweep voltammetry (LSV), and the potential window is found to be 3.1 V. Furthermore, the cyclic stability of the highest ion conducting membrane is investigated by Cyclic voltammetry (CV). The focus of the current investigation highlights the performance of Li-ion conducting membrane as electrolyte in electrochemical devices.