An Investigation into the PVA:MC:NH4Cl-Based Proton-Conducting Polymer-Blend Electrolytes for Electrochemical Double Layer Capacitor (EDLC) Device Application: The FTIR, Circuit Design and Electrochemical Studies.

Shujahadeen B. Aziz,Mohd F. Z. Kadir,Niyaz M. Sadiq,Elham M. A. Dannoun,Muaffaq M. Nofal,Sameerahl I. Al-Saeedi,Wrya O. Karim,Mohamad A. Brza

doi:10.3390/molecules27031011

Abstract

In this report, the preparation of solid polymer electrolytes (SPEs) is performed from polyvinyl alcohol, methyl cellulose (PVA-MC), and ammonium chloride (NH4Cl) using solution casting methodology for its use in electrical double layer capacitors (EDLCs). The characterizations of the prepared electrolyte are conducted using a variety of techniques, including Fourier transform infrared spectroscopy (FTIR), electrical impedance spectroscopy (EIS), cyclic voltammetry (CV), and linear sweep voltammetry (LSV). The interaction between the polymers and NH4Cl salt are assured via FTIR. EIS confirms the possibility of obtaining a reasonably high conductance of the electrolyte of 1.99 × 10−3 S/cm at room temperature. The dielectric response technique is applied to determine the extent of the ion dissociation of the NH4Cl in the PVA-MC-NH4Cl systems. The appearance of a peak in the imaginary part of the modulus study recognizes the contribution of chain dynamics and ion mobility. Transference number measurement (TNM) is specified and is found to be (tion) = 0.933 for the uppermost conducting sample. This verifies that ions are the predominant charge carriers. From the LSV study, 1.4 V are recorded for the relatively high-conducting sample. The CV curve response is far from the rectangular shape. The maximum specific capacitance of 20.6 F/g is recorded at 10 mV/s.

Highlights

Introduction conditions of the Creative CommonsIn electrochemical energy devices, one of the fundamental parts is the polymer electrolyte (PE)
Fourier transform infrared spectroscopy (FTIR) spectroscopy is a valuable scheme which can be used to distinguish the degree to which ions and atoms interact in PE systems
The implementation of the solution casting method was performed in fabricating solid polymer electrolytes (SPEs) containing NH4 + as the conducting species

Summary

Introduction

One of the fundamental parts is the polymer electrolyte (PE). Among the electrochemical properties of solid materials, ionic conduction has to be highly focused on ion-conducting materials to be utilized in the energy storage. PEs appear as materials of interest that possess the required conductivity, as well as electrochemical stability [1,2,3]. Dimensional stability, durability, a relatively wide potential window (usually above 1.5 V), and its eco-friendly nature are all properties of these materials [4]. The characterizations of PEs are highly required because of its utilization in multidisciplinary fields, such as electrochemistry, polymer science, organic chemistry, and inorganic chemistry [5]. As a potential alternative to liquid electrolytes, solid polymer electrolytes (SPEs) have received considerable interest as the safest alternative [6]

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