Comparative study of the properties of plasticized (PVDF-HFP)-MG49-LiBF4 blend polymer electrolytes

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 strong electron withdrawing functional group (-C-F) in PVDF-HFP makes this polymer anodically stable and modications aer its exposure to radiation have attracted more attention due to improved physical properties and the offer of new applications like optoelectronic devices, sensors, super capacitors, medical radiation therapy and food processing. 9,12 The present paper reports the effect of EB irradiation on the optical and electrical properties of the copolymer PVDF-HFP doped with LiClO 4 and an investigation into the change in chemical properties and morphology upon irradiation, conrming the decrease in optical band gap and increased ionic conductivity with increased EB dose. The polymer electrolytes exhibit the desired opto-electronic properties aer exposure to radiation and hence irradiated PVDF-HFP/LiClO 4 polymer electrolytes can be used in battery, solar cell and LED preparation.…”

“…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.…”

Flexible solid-like electrolytes with ultrahigh conductivity and their applications in all-solid-state supercapacitors

“…The amorphous HFP units can provide more space, enabling trapping of a large amount of liquid, and the crystalline PVDF units can act as a mechanical support. 20,21 The high dielectric constant of PVDF-HFP (3 ¼ 8.4) facilitates dissociation of the salt and higher number of charge carriers in the electrolyte. 20,21 In this study, PVDF-HFP was used with ionic liquid (IL) because it provides not only mechanical strength but also an ion pathway by tuning the segment ratio of the crystalline and amorphous phases.…”

Smart Energetics: Sensitization of the Aluminum‐Fluoropolymer Reactive System

“…The literature on PVDF confirms that beta phase peaks will occur at 510, 840, and 1279 cm −1 (as indicated on the graph) while the gamma phase peaks occur at 431, 512, 776, 812, 833, 840, and 1234 cm −1 . For VDF‐HFP the literature confirms a beta phase peak at 838 cm −1 . In the case of the THV, a region of spontaneous polarization exists between 1000 and 1330 cm −1 , in which dipoles can realign .…”

“…While PVDF and VDF‐HFP have been studied and fabrication conditions leading to high electroactive phase content are known the terpolymer THV has very few published studies detailing optimum fabrication conditions. There are five structural configurations considered for PVDF, two of which are electroactive phases .…”