FisMat2017 - Submission - View

Abstract's title: Poly (Ethylene Oxide) Based Nano-Composite Gel-Polymer Electrolytes for Sodium-Ion Secondary Batteries
Submitting author: Thineth Jayamaha
Affiliation: University of Jaffna
Affiliation Address: Department of Physics University of Jaffna Jaffna Sri Lanka
Country: Sri Lanka
Oral presentation/Poster (Author's request): Oral presentation
Other authors and affiliations: J.H.T.B.Jayamaha1, L.Wewagama1, K.Vignarooban1, K.S.Perera2, K.P.Vidanapathirana2 and M.A.K.L.Dissanayake3 1Department of Physics, University of Jaffna, Jaffna, Sri Lanka 2Department of Electronics, Wayamba University of Sri Lanka, Kuliyapitiya, Sri Lanka 3National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka


As the R&D activities on sodium-ion batteries (SIBs) are growing rapidly in recent days, we synthesized and characterized a new type of nano-composite gel-polymer electrolyte (GPE) based on Poly (ethylene oxide) (PEO) polymer host and sodium perchlorate (NaClO4) ionic salt. Out of several compositions of PEO:NaClO4 solid-polymer electrolytes studied at the initial step of this work, composition with 10:1 either oxygen to Na+ ion ratio showed a maximum room temperature ionic conductivity (~ 10-5 S cm-1). Incorporation of both TiO2 nano-filler and PC plasticizer into the PEO: NaClO4 solid polymer electrolyte has led to the formation of gel-polymer electrolytes with significantly enhanced ionic conductivities with the composition 10PEO: NaClO4 + 75wt% PC +5wt% TiO2 exhibiting the highest room temperature ionic conductivity in the order of 10-3 S cm-1. According to the results of the DC polarization analysis, values of the electronic transference number (telec)of the electrolytes were found to be very small as 0.08 for the sample without the filler and 0.17 for the sample with 5wt% of TiO2 filler. DSC studies showed a glass transition temperature of (-14.8) oC for the above-mentioned composition with optimized conductivity. Overall, this nano-composite gel-polymer electrolyte has the potential to be used as electrolyte in secondary SIBs.