Effect of gamma irradiation on poly(vinyledene difluoride)–lithium bis(oxalato)borate electrolyte

Abstract

A poly(vinyledene difluoride)-lithium bis(oxalato)borate solid polymer electrolyte prepared by a solvent casting method has been irradiated with different doses of gamma-rays. Differential scanning calorimetry reveals that the polymer electrolyte irradiated with 35 kGy of γ-rays is the most amorphous sample. This is also supported by the results obtained from X-ray diffraction. The Fourier transform infrared spectrum of each irradiated sample has been deconvoluted in the wavenumber region between 1830 and 1758 cm(-1) in order to predict the percentage of free and contact ions in the samples. The sample exposed to 35 kGy of γ-rays contains the highest percentage of free ions and the lowest amount of contact ions. This sample also exhibits the highest room temperature conductivity of 3.05 × 10(-4) S cm(-1), which is 15% higher relative to the virgin sample. The number density of free ions is observed to have more control on the conductivity variation with the γ-radiation dose compared to ionic mobility. This study confirms that γ-irradiation can be a potential way to obtain highly conductive and mechanically stable polymer electrolytes.

Electro-mechanical properties of free standing micro- and nano-scale polymer-ceramic composites for energy density capacitors

“…7(c) shows the dielectric behavior of PVDF-PZT-CFO composite which indicates the increased dielectric constant with addition of PZT ceramic particles, though the CFO weight fraction is less in this case yet it provides enough room for nucleation of high electroactive β-phase (evident from Raman spectra of PVDF-PZT-CFO composite film). orientations which in turns provide large dielectric dispersion with high frequency loss [44]. In this temperature regime as the temperature increases from 20°C to around 40°C the tangent loss decreases due to active participation of short range dipoles since they are in phase with oscillating field.…”

Performance characteristics of guanine incorporated PVDF-HFP/PEO polymer blend electrolytes with binary iodide salts for dye-sensitized solar cells

“…At low frequency region, the conductivity decreases due to the more charge accumulation occurs at the electrode-electrolyte interface which leads to decrease in number of mobile ions. At high frequency dispersive region, the conductivity increases with increasing frequency due to the higher mobility of charge carriers, which is associated with a.c conductivity of the polymer blend electrolytes [46]. The guanine incorporated polymer blend electrolyte showed the higher a.c conductivity value than the other electrolytes.…”

Synthesis and fabrication of high‐potent antimicrobial polymeric ultrathin coatings

“…46 The thermal stability of monomers and copolymer was studied using TGA and reported in Figure 6(a,b). 46 The thermal stability of monomers and copolymer was studied using TGA and reported in Figure 6(a,b).…”

“…C. 46 The thermal stability of monomers and copolymer was studied using TGA and reported in Figure 6(a,b). The rate of mass loss of (Table II).…”