Potential of UV-Curable Poly(Glycidyl Methacrylate-co-Ethyl Methacrylate)- Based Solid Polymer Electrolyte For Lithium Ion Battery Application

摘要

Lithium ion conducting solid polymer electrolytes (SPE) based on P(GMA-co-EMA)(80/20) dopedLiClO4 as charge carrier was prepared by solution casting method. P(GMA-co-EMA) has beensynthesized by photopolymerisation technique. Interactions between the polymer and salt were studiedusing fourier transforms infrared (FTIR). Ionic conductivity, electrochemical stability window, thermaland crystallinity behavior of polymer complexes were studied by AC impedance, cyclic voltammetry,+ and x-ray diffraction (XRD), respectively. Based on FTIR result, it was observed that the Li ionsinteracted with carbonyl group, the ether group and the epoxy oxygen of the GMA and EMA. The highest ionic conductivity of the electrolyte obtained at 2.810 S cm at 25C and 1.7510 S cmat 100 C. These solid polymer electrolytes showed electrochemical stability window up to 3.8V.Furthermore, the thermal stability of the electrolyte increases with an increase in the salt content.These conductivity results were supported by XRD analysis which depicted that the semi-crystallinenature of P(GMA-co-EMA) was reduced to amorphous state due to an increase of LiClO4 content. Theabove results indicate that this material, namely PGMA- has potential for lithium ion application.