Corn starch doped with sodium iodate as solid polymer electrolytes for energy storage applications

Fatin Farhana Awang,Khadijah Hilmun Kamarudin,Mohd Faiz Hassan

doi:10.14311/ap.2021.61.0497

Fatin Farhana Awang, Khadijah Hilmun Kamarudin + Show 1 more

Open Access

https://doi.org/10.14311/ap.2021.61.0497

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Journal: Acta Polytechnica	Publication Date: Aug 31, 2021
Citations: 4	License type: CC BY 4.0

Affiliation: Universiti Malaysia Terengganu

Abstract

The concern about environmental problems has inspired a of energy storage devices from natural sources. In this study, solid polymer electrolyte (SPE) films made from corn starch doped with different compositions of sodium iodate (NaIO3) were prepared via the solution casting technique. The effect of dopants on the structure, morphology and electrical properties of SPE films was analysed using X-Ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) analysis. From the XRD, it shows that the amorphous state would influence the conductivity values of SPE films. Then, the SEM observations revealed that the films seem to be rough, porous and having branch structure, which may affect the conductivity of SPE films. The maximum conductivity of SPE film is obtained from 3 wt.% of NaIO3 with a value of 1.08 × 10−4 Scm−1 at room temperature (303K). From the results, this SPE is proposed to have a great potential in future energy storage applications.

Highlights

Electrolyte is one of the main components in battery, which has been used as a medium for ion movement between anode and cathode
The purpose of this study is to investigate the morphology and electrical properties of corn starch doped with sodium iodate (NaIO3) by using the X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrical impedance spectroscopy (EIS) techniques
The XRD analysis proved the coexistence of peaks, which confirmed the complexation of studied materials took place

Summary

Introduction

Electrolyte is one of the main components in battery, which has been used as a medium for ion movement between anode and cathode. It can be divided into liquid and solid electrolytes. The important criteria in the selection of SPE include stability and safety, reduction in cost and weight, and flexibility, which is easy to be fabricated and could perform as a proper medium for electrode-electrolyte contact [2,3,4,5,6]. The ion conduction usually takes place in the amorphous region [12]. This is because the amorphous phase provides free spaces for the ions to move along with the polymer matrix. Many efforts have been suggested to enhance the ionic conductivity of polymer electrolytes, which includes incorporating various ionic dopant with host polymers [13]

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Conclusion