Effect of electron irradiation on optical, thermal and electrical properties of polymer electrolyte
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Effects of 10 MeV electron beam irradiation on KBr/PVA composite films were studied using various experimental methods. The FTIR study shows that the irradiation produces chemical modification within the composite. The change in the optical properties like, increment in the transition dipole moment, dipole strength, dipole length, oscillator strength, optical activation energy and decrement in the optical band gap with radiation dose were observed from the UV–Vis study. These results may be attributed to the change in molecular ordering, creation of defects and formation of charge transfer complex incurred due to irradiation. Furthermore, the electrical conductivity increases with irradiation dose; initially due to crosslinking of polymer chains (below 150 kGy) and then due to chain scission (after 150 kGy). The TGA study reveals that the polymer chain crosslinking leads to enhancement in the onset temperature (T0) at lower dose and the scissioning of polymer chains leads to the decrement in the onset temperature at higher dose. Moreover, the activation energy of thermal decomposition is in good agreement with the value of onset temperature. This indicates that the crosslinking is predominantly high at lower doses and cleavage occurs at higher dose. The study reveals that the electron beam irradiation is a powerful tool to modify the optical, thermal and electrical properties of polymer electrolyte.
KeywordsElectron irradiation Polymer electrolyte Crosslinking Chain scission Dipole moment Degradation
The authors are thankful to CeNSE, Indian Institute of Science, Bangaluru, funded by the Ministry of Electronics and Information Technology (MeitY), Govt of India for extending experimental facilities.
- 3.Khapre SA, Yawale SP, Yawale SS (2012) Fabrication of thin film lithium-ion batteries using conducting polymer electrolytes. Sci Revs Chem Commun 2:336–339Google Scholar
- 5.Chew KW, Tan KW (2011) The effect of ceramic fillers on PMMA-based polymer electrolyte salted with lithium triflate, LiCF3SO3. Int J Electrochem Sci 6:5792–5801Google Scholar
- 8.Ravi M, Bhavani S, Pavani Y, Narasimha Rao VVR (2013) Investigation on electrical and dielectrical properties of PVP:KCLO4 polymer electrolyte films. Indian J Pure Appl Phys 51:362–366Google Scholar
- 11.Mahantesha BK, Ravindrachary V, Padmakumari R, Sahanakumari R, Sanjeev G, Verma VP (2018) Microstructural, thermal and electrical properties of electron irradiated Li2CO3 doped PVA. Indian J Pure Appl Phys 56:616–620Google Scholar
- 19.Mott NF, Davis EA (1979) Electronic process in non-crystalline materials. Clarendon, OxfordGoogle Scholar