Structural, Electrical and Electrochemical Properties of Glycerolized Biopolymers Based on Chitosan (CS): Methylcellulose (MC) for Energy Storage Application

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 × 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 (µ), 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, tion 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, Cs of 98.08 F/g at 10 mV/s by using the cyclic voltammetry (CV) technique.

Studies of Circuit Design, Structural, Relaxation and Potential Stability of Polymer Blend Electrolyte Membranes Based on PVA:MC Impregnated with NH4I Salt

“…The impedance of Z CPE is shown as [ 57 , 58 , 59 ]: where C is the capacitance of the constant phase element, p is the degree of deviation of the EIS plots from the vertical axis, and ω is the angular frequency. The EEC is represented by the real ( Z r ) and imaginary ( Z i ) components of complex impedance (Z*) (insert of Figure 1 a) and the mathematical basis are shown in Equations (3) and (4): …”

Characteristics of Plasticized Lithium Ion Conducting Green Polymer Blend Electrolytes Based on CS: Dextran with High Energy Density and Specific Capacitance

“…This is due to the glycerol plasticizer's ability to aid in the dissolution of LiClO 4 salt through the CS: Dex mix matrix. The following formulae can be used to calculate the percentage of free ions and contact ion pairs [30,[67][68][69]. Table 3 displays the percentages of ion carriers.…”

“…where A f, and A c, are the area of the peaks of the free ions and the contact ion pair, respectively. The charge carrier parameters can be calculated using the percentage of free ions of each electrolyte and the relationship illustrated below ( 12)-( 14) [30,[67][68][69].…”

Investigation of thermo- and electrophysical properties of dried crushed sea buckthorn cake

“…Характер изменения коэффициента диэлектрических потерь в большей степени зависим от содержания влаги в жмыхе. При этом вид кривых позволяет качественно оценить влияние влаги с различной формой связи с материалом на изменение диэлектрических свойств [9,[10][11][12][13][14][15][16][17][18][19][20].…”