Conductivity and ionic mobility studies on Li2WO4-LiI- Al2O3 by EIS and NMR techniques

• Published in: Jurnal Teknologi
• Main Author: Omar M.K.; Ahmad A.H.
• Format: Article
• Language: English
• Published: Penerbit UTM Press 2015
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940181828&doi=10.11113%2fjt.v75.5170&partnerID=40&md5=bcafde5f39430f1b554137fb20343e61

Li2WO4-LiI-Al2O3 solid electrolytes have been found to be a potential electrolyte for battery applications due to its high electrical conductivity at ambient temperature. The binary solid electrolyte with incorporation Al2O3 was prepared in solid state reaction and characterized by Electrical Impedance Spectroscopy (EIS) and 7Li Magic Angle Spinning (MAS) solid state Nuclear Magnetic Resonance (ssNMR) technique. Maximum electrical conductivity of 3.35×10-3 Scm-1 was recorded for the sample containing 20 wt.% of LiI. The conductivity improved up to 3.92×10-3Scm-1 as 5wt.% of Al2O3 was added into the optimum composition of the binary system. Mobility of the charge carrier in the sample was investigated and NMR result showed that the electrolyte with high ionic mobility contribute into high electrical conductivity. © 2015 Penerbit UTM Press. All rights reserved.