Improved ionic conductivity in guar gum succinate–based polymer electrolyte membrane
Document Type
Article
Publication Date
1-1-2018
Abstract
Guar gum succinate (GGS) was chemically modified by reacting guar gum with succinic anhydride in the presence of 4-dimethylaminopyridine. Succination was confirmed by Fourier transform infrared (FTIR) spectroscopy with carbonyl bands at 1724 cm −1 and ester linkage at 1567 cm −1 of the succinate group. The resulting amorphous, GGS was used as a polymer host to prepare cost-effective solid polymer electrolyte (SPE) films via incorporating a blend of ethylene carbonate (EC), carboxymethyl cellulose (CMC), lithium triflate (LiTf) and lithium iodide (LiI). SPE system for GGS:EC (1.0:0.6) with 30 wt% LiTf showed highest conductivity of 6.29 × 10 −5 S cm −1 and GGS:CMC:EC (0.5:0.5:0.6) with 25 wt% LiI showed highest conductivity of 2.10 × 10 −4 S cm −1 . FTIR revealed multiple complexation sites for ion mobility indicating that GGS possesses high prospects as a conductive SPE.
Keywords
electrochemical impedance spectroscopy, Fourier transform infrared spectroscopy, Guar gum succinate, solid polymer electrolyte
Publication Title
High Performance Polymers
Divisions
chemistry,CHEMISTRY,PHYSICS
Funders
University of Malaya under the University Research Grant number PG028-2014A
Volume
30
Issue
8
Publisher
SAGE Publications