Electrochemical Performance of Composite Solid Biopolymer Electrolytes Pectin and Guar gum with Lithium Salts and Disparately Processed NM Cathodes

Abstract

Lithium- ion batteries have drawn considerable attention due to their high energy density newlineand promising implementation in electric vehicles and wearable electronic devices. Focusing on newlinesafety concerns, the use of flammable organic liquid electrolytes has become a major holdup in newlineessential applications of Li-ion batteries. Polymer electrolytes with the better properties provide a solution to safety issues when compared to liquid electrolytes. As of now, the study of polymer newlineelectrolyte for Li-ion batteries is still inadequate. Consequently, significant research efforts have newlinebeen dedicated to achieve next-generation solid-state batteries with polymer electrolytes. The newlinebuilding of polymer electrolytes intrinsically gives rise to the higher mechanical strength and higher conductivity. Natural polymers can become appealing substitutes for synthetic polymers. The main objective of the study is to prepare solid electrolytes based on biopolymers doped with lithium salts and plasticizers by solution casting technique. The cathode material, lithium manganese nickel oxide, is prepared by the electrospinning method using polymer polyacrylonitrile, lithium acetate,manganese acetate and nickel acetate salts with dimethylformamide as a solvent. Composition of polymer to salt, concentration of salt in polymer and influence of plasticizer are systematically analyzed. Lithium Manganese Nickel oxide is prepared and characterized. Structural analysis by XRD, complexation of polymer with salt by FTIR, XPS for oxidation state of the elements, Laser Profilometry and Electron microscope (SEM and TEM) for morphological analysis, thermal stability by TGA, conductivity by AC impedance analysis, Transference number through chronoamperometric measurement and redox potentials by Cyclic voltammetry are carried out. An attempt is made by DFT study to find the probability of the preparation of electrolytes. The addition of plasticizers and ionic liquids enhanced the conductivity. The addition of ionic liquids influences the interaction of lithiu