preparation and characterization of solid polymer electrolyte of lithium salts polyvinyl pyrrolidone

Solid polymer electrolytes are essential components for realizing solid-state batteries. solid-state batteries have long relied on polymer electrolytes based on polyoxyethylene. however, these electrolytes have a limited electrochemical window, which restricts future improvements in energy density. this work produced and characterized a solid polymer electrolyte based on plasticized polyvinylpyrrolidone (pvp). electrochemical methods, such as electrochemical impedance spectroscopy and cyclic voltammetry, were used to determine the electrolyte’s conductivity. for the manufacture of this plasticized pvp solid polymer electrolyte, propylene carbonate (pc) was used as the plasticizer, and lithium perchlorate (liclo₄), lithium carbonate (li₂co₃), and lithium nitrate (lino₃) served as the salts. the plasticized pvp solid polymer electrolyte was prepared using the solution casting technique. the synthesized plasticized pvp was verified using uv-vis spectroscopy. ac impedance measurements were conducted to determine the conductivity of the films, while surface properties were investigated using atomic force microscopy (afm). in addition, the electrochemical stability of the electrolytes was examined.