Characterization of polyethylene glycol plasticized carboxymethyl cellulose-ammonium fluoride solid biopolymer electrolytes

Abstract

An attempt to increase the ionic conductivity of solid biopolymer electrolyte (SBE) from carboxyl methylcellulose (CMC) doped with 9 wt. % of ammonium fluoride (AF) has been made by the plasticizing with polyethylene glycol (PEG). Electrochemical Impedance Spectroscopy (EIS) was used to investigate the ionic conductivity of the CMC-AF-PEG SBEs. The study shows that the highest conductivity achieved is 6.62 × 10-7 S cm-1 at room temperature for SBE with 25 % wt. PEG. X-Ray Diffraction (XRD) study proved that the highest conductive SBE has the highest amorphous nature which contributes to the high conductivity of the SBE. The interaction of CMC and AF was enhanced by the addition of PEG at C-O band in the CMC.