title: 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.
authors.affiliation: Applied Radiation Laboratory, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Mimi Hayati
authors.initials: MH
authors.lastname: Abdul Rahaman
authors.forename: Mayeen Uddin
authors.initials: MU
authors.lastname: Khandaker
authors.forename: Ziaul Raza
authors.initials: ZR
authors.lastname: Khan
authors.forename: Mohd Zieauddin
authors.initials: MZ
authors.lastname: Kufian
authors.forename: Ikhwan Syafiq Mohd
authors.initials: IS
authors.lastname: Noor
authors.forename: Abdul Kariem
authors.initials: AK
authors.lastname: Arof