Effect of lithium salt concentrations on blended 49% poly(methyl methacrylate) grafted natural rubber and poly(methyl methacrylate) based solid polymer electrolyte

摘要: Abstract The effect of lithium salts (lithium tetrafluoroborate, LiBF 4 and perchlorate, LiClO ) as doping in rubber-polymer blends, 49% poly(methyl methacrylate) grafted natural rubber (MG49) (PMMA) solid polymer electrolyte (SPE) film for electrochemical devices application was investigated. films were prepared via the solution casting technique using 0–25 wt.% salt. on chemical interaction, ionic conductivity structural morphological studies (70:30) MG49-PMMA analyzed Fourier Transform Infrared (FT-IR) Spectroscopy, Electrochemical Impedance Spectroscopy (EIS), X-ray Diffraction (XRD) Scanning Electron Microscopy (SEM). analysis showed that interactions between ions oxygen atoms occur at ether group (C–O–C) (1500–1100 cm −1 MMA structure both MG49 PMMA. host act electron donor form a coordinate bond with from salt to polymer–salt complexes. investigated room temperature well range 303 K 373 K. without addition 1.1 × 10 −12  S cm . highest MG49-PMMA–LiBF 8.6 × 10 −6 25 wt.% MG49-PMMA–LiClO 1.5 × 10 −8 However, systems do not exhibit Arrhenius-like behavior. Systems have higher than those because differences anionic size lattice energy appropriate observations morphology complexation re-crystallization system. XRD reduction peak intensity 29.5° after 5–25 wt.% due ion dissociation Thus, this contributed increase Morphological is homogenously blended, no phase separation occurred. changed topological texture smooth dark surface rough bright surface.