Ionic Conducting Solid Biopolymer Electrolytes Based On Carboxymetyl Cellulose Doped Ammonium Fluoride

Abstract

The development and characterizations of a new-type solid biopolymer electrolytes (SBE) based on carboxymethyl cellulose (CMC) doped with varied content of ammonium fluoride (NH4F) is presented in this thesis. The SBEs were prepared via solution casting technique. The SBEs were analyzed using Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), Electrical Impedance (EI) and Transference Number Measurement (TNM) techniques. The iinteractions between CMC and NH4F occurred at 1581, 1406, 1313 and 1047 cm -1 as proven in FTIR. The addition of NH4F has increased the amorphous domain of SBEs as observed from XRD analysis. The highest room temperature ionic conductivity achieved was 2.68×10 -7

Scm -1 for SBE containing 9 wt. % NH4F. The ionic conductivity of the SBEs was found to be influenced by mobility and diffusion coefficient of ions. TNM analysis revealed that the SBEs were predominantly proton conductor.