Gel electrolytes based on poly(vinylidenefluoride-co-hexafluoropropylene)/thermoplastic polyurethane/poly(methyl methacrylate) with in situ SiO₂ for polymer lithium batteries

Abstract

Gel polymer electrolyte films based on poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF–HFP), thermoplastic polyurethane (TPU) and poly(methyl methacrylate) (PMMA) with and without in situ SiO2 fillers are prepared by electrospinning polymer solution at room temperature.

Optical properties and ionic conductivity studies of an 8 MeV electron beam irradiated poly(vinylidene fluoride-co-hexafluoropropylene)/LiClO4electrolyte film for opto-electronic applications

“…The deformed CH 2 band appearing at 1400 cm À1 is assigned to the vinylidene group of the host polymer and shied to a higher wavenumber, 1405 cm À1 , at 120 kGy due to C-H bond scissioning. 17,18 It is clearly observed that the intensity of the CH 2 bond wagging increases with radiation dosage due to dehydrogenation (breaking of H bonds) in the lm, leading to C-H bond scissioning as a result of the formation of a C]C bond. 19 The disappearance of the crystalline band at 978 cm À1 of PVDF-HFP aer irradiation is clearly due to the deformation of the chemical structure and the amorphous peak at 868 cm À1 shied to 878 cm À1 , indicating increasing amorphous character due to the creation of defects in the polymer chain crystalline phase with higher doses.…”

Symmetric electric double‐layer capacitor containing imidazolium ionic liquid‐based solid polymer electrolyte: Effect of TiO2 and ZnO nanoparticles on electrochemical behavior

“…After plasticization with IL, peak area is reduced significantly and also moves to lower temperatures which are subsequently observed by addition of nanoparticles in IL embedded electrolytes. It indicates that the fraction of amorphous phase increases which is confirmed by calculating the degree of crystalline fraction (X C ) from the relationship (X C = ΔH m /ΔH 0 m 100%), where ΔH 0 m $ 104.7 J g −1 is the melting enthalpy for 100% crystalline PVDF-HFP polymer matrix 40 and ΔH m is melting enthalpy of SPE, which has been calculated from the area under the melting peak in DSC traces. The values of T m , ΔH m , and X C of pure PVDF-HFP film and SPEs are listed in Table I. We have studied ATR-FTIR spectra of pure PVDF-HFP film, SPE-1, SPE-2, and SPE-3 polymer electrolytes in the wave number region 4000-650 and 1000-650 cm −1 shown in Figure 2(a,b), respectively, at room temperature.…”

PVC/PEMA‐based blended nanocomposite gel polymer electrolytes plasticized with room temperature ionic liquid and dispersed with nano‐ZrO2 for zinc ion batteries

“…Prior to the breakdown voltage, the anodic scan displays a very small residual current and this might be attributed to the purity of the synthesized gel composite membrane and the preparation method adopted. The adequate stability of such composite gel electrolytes specifies their appropriateness for applications in battery technology .…”