Investigation of Ion Transport Parameters and Electrochemical Performance of Plasticized Biocompatible Chitosan-Based Proton Conducting Polymer Composite Electrolytes

Abstract

In this study, biopolymer composite electrolytes based on chitosan:ammonium iodide:Zn(II)-complex plasticized with glycerol were successfully prepared using the solution casting technique. Various electrical and electrochemical parameters of the biopolymer composite electrolytes’ films were evaluated prior to device application. The highest conducting plasticized membrane was found to have a conductivity of 1.17 × 10−4 S/cm. It is shown that the number density, mobility, and diffusion coefficient of cations and anions fractions are increased with the glycerol amount. Field emission scanning electron microscope and Fourier transform infrared spectroscopy techniques are used to study the morphology and structure of the films. The non-Debye type of relaxation process was confirmed from the peak appearance of the dielectric relaxation study. The obtained transference number of ions (cations and anions) and electrons for the highest conducting sample were identified to be 0.98 and 0.02, respectively. Linear sweep voltammetry shows that the electrochemical stability of the highest conducting plasticized system is 1.37 V. The cyclic voltammetry response displayed no redox reaction peaks over its entire potential range. It was discovered that the addition of Zn(II)-complex and glycerol plasticizer improved the electric double-layer capacitor device performances. Numerous crucial parameters of the electric double-layer capacitor device were obtained from the charge-discharge profile. The prepared electric double-layer capacitor device showed that the initial values of specific capacitance, equivalence series resistance, energy density, and power density are 36 F/g, 177 Ω, 4.1 Wh/kg, and 480 W/kg, respectively.

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

“…Further understanding of the electrical properties of each electrolyte can be inspected by means of the electrical equivalent circuits (EECs) as shown in the impedance plots ( Figure 1 ). From the EECs modeling, the values of circuit elements can be identified where the expression of CPE impedance ( Z CPE ) is as follows [ 53 , 54 , 55 ]: …”

Bio-Based Plasticized PVA Based Polymer Blend Electrolytes for Energy Storage EDLC Devices: Ion Transport Parameters and Electrochemical Properties

“…The EDLC coin cell using the electrolyte/electrode arrangement is shown in Figure 1. where: t is the sample thickness, A is the electrode area and Rb is the bulk resistance, which is determined from the intersection of the tail with real axis [49].…”

A Polymer Blend Electrolyte Based on CS with Enhanced Ion Transport and Electrochemical Properties for Electrical Double Layer Capacitor Applications

“…Beyond 175 cycles, E is clearly started to stabilize at an average value of 10.38 Wh/kg all over the 500 charge-discharge cycles. This fact clarifies that both NO3 − anions and NH4 + or H + cations in the polymer chains of the CS:MC blend move towards the electrode surface at an almost Negatively and positively charged ions are still employed to get used to the conduction pattern at the initial stage [84,85]. Table 4 shows an example of reported works related to the application of EDLC using various types of polymer electrolytes and materials.…”

“…Negatively and positively charged ions are still employed to get used to the conduction pattern at the initial stage [ 84 , 85 ]. Table 4 shows an example of reported works related to the application of EDLC using various types of polymer electrolytes and materials.…”