Effect of electron beam irradiation on gel polymer electrolytes: change in morphology, chemical structure and electrochemical

Jamilah Karim, Puteri Intan Zulaikha Syed Mahadzir, Siti Aminah Mohd Nor, Mariah Zuliana Dzulkipli, Ruzalina Baharin, Azizan Ahmad, Mohd Sukor Su'ait, Nur Hasyareeda Hassan

Abstract


GPEs (gel polymer electrolytes) are seen as a potential replacement for standard liquid electrolytes. It has been demonstrated that dispersion of nanofiller in GPEs improves electrolyte properties such as reduced reactivity, reduced leakage, enhanced safety, improved form flexibility, and manufacturing integrity. Meanwhile, the electrochemical process is accelerated by using electron beam (EB) radiation. The goal of this study was to investigate the properties of BMIMBF4 (PVDF-HFP) GPEs (physicochemical, thermal, morphological, and electrochemical) after in-situ surface modification of zirconia with vinyltriethoxysilane (VTES) coupling agent, as well as the effect of 8 MeV energy EB irradiation the radiation effect on GPE conductivity was conducted by using impedance analyzer in the frequency range of 0.1-10 MHz. The change in chemical interaction, and morphology was analyzed by of Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) respectively for before and after irradiation. The morphology analysis shows surface smooth until 4 wt. % loading of ZIP-VTES with the average particle size 20 nm. The chemical change was confirmed from the ATR-FTIR results which showed that peak intensities corresponding to hydrogen bonds increased and shifted with increase in electron doses, which clearly indicated a strong interaction between polymer gel and zirconia. The maximum conductivity was observed to be 5.63 × 10-1 S/cm for 10 kGy and 0.61 value of lithium-ion transference number obtained at 298 K for 10 kGy dose.

Keywords


electron beam; BMIMBF4-(PVDF-HFP)-LiCO4; zirconia; surface modification; gel polymer electrolyte

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