Characteristics of gellan gum-LiCF3SO3 polymer electrolytes
Document Type
Article
Publication Date
1-1-2012
Abstract
A new and thermally stable gellan-based polymer electrolytes (PEs) with LiCF3SO3 were prepared and characterized by spectroscopic (FTIR), thermal (TGA, DSC and DMA), structural (X-ray), electrochemical stability (CV. and LSV) and ionic conductivity measurements. The obtained results revealed that the samples are semi-crystalline and are thermally stable up to 234 degrees C. The ionic conductivity measurements revealed that the ionic conductivity of the electrolyte varies with the salt concentration to reach the highest conductivity value of 5.4 x 10(-4) S/cm at room temperature for 40 wt.% of LiCF3SO3. For this compound, when the temperature is raised to 80 degrees C, the ionic conductivity increases to 6.6 x 10(-4) S/cm with an activation energy of 14.6 kJ/mol. Cyclic voltammetry measurements demonstrated that the plating-striping process in highest conducting.gellan-LiCF3SO3 sample occured at 0.55 V and 1.24 V respectively. All results obtained indicate that gellan-based PEs are very promising candidates to be used as electrolytes in Li conducting electrochemical devices. (C) 2012 Elsevier B.V. All rights reserved.
Keywords
polymer electrolyte, gellan gum, licf3so3, sodium-chloride, gum gels, chitosan, films, ftir
Divisions
PHYSICS
Publication Title
Solid State Ionics
Volume
225
Publisher
Elsevier
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA