Structural, electrical and electrochemical properties of glycerolized biopolymers based on chitosan (CS): Methylcellulose (MC) for energy storage application
Document Type
Article
Publication Date
4-1-2021
Abstract
In this work, a pair of biopolymer materials has been used to prepare high ion-conducting electrolytes for energy storage application (ESA). The chitosan:methylcellulose (CS:MC) blend was selected as a host for the ammonium thiocyanate NH4SCN dopant salt. Three different concentrations of glycerol was successfully incorporated as a plasticizer into the CS-MC-NH4SCN electrolyte system. The structural, electrical, and ion transport properties were investigated. The highest conductivity of 2.29 x 10(-4) S cm(-1) is recorded for the electrolyte incorporated 42 wt.% of plasticizer. The complexation and interaction of polymer electrolyte components are studied using the FTIR spectra. The deconvolution (DVN) of FTIR peaks as a sensitive method was used to calculate ion transport parameters. The percentage of free ions is found to influence the transport parameters of number density (n), ionic mobility (mu), and diffusion coefficient (D). All electrolytes in this work obey the non-Debye behavior. The highest conductivity electrolyte exhibits the dominancy of ions, where the ionic transference number, t(ion) value of (0.976) is near to infinity with a voltage of breakdown of 2.11 V. The fabricated electrochemical double-layer capacitor (EDLC) achieves the highest specific capacitance, C-s of 98.08 F/g at 10 mV/s by using the cyclic voltammetry (CV) technique.
Keywords
Chitosan, Methylcellulose, Ammonium thiocyanate, Glycerol, Ionic transport parameters, TNM and LSV, CV and EDLC
Divisions
physics
Funders
University of Sulaimani,King Saud University,Komar University of Science and Technology,King Saud University [Grant No: RSP-2020/29]
Publication Title
Polymers
Volume
13
Issue
8
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND