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

Fatin Farhana Awang; Mohd Faiz Hassan; Khadijah Hilmun Kamarudin

doi:10.14311/AP.2021.61.0497

Authors

Fatin Farhana Awang Universiti Malaysia Terengganu, Faculty of Science and Marine Environment, Ionic State Analysis (ISA) Laboratory, Advanced Nano-Materials (ANoMa) Research Group, 21030 Kuala Nerus, Terengganu, Malaysia
Mohd Faiz Hassan Universiti Malaysia Terengganu, Faculty of Science and Marine Environment, Ionic State Analysis (ISA) Laboratory, Advanced Nano-Materials (ANoMa) Research Group, 21030 Kuala Nerus, Terengganu, Malaysia
Khadijah Hilmun Kamarudin Universiti Malaysia Terengganu, Faculty of Science and Marine Environment, Ionic State Analysis (ISA) Laboratory, Advanced Nano-Materials (ANoMa) Research Group, 21030 Kuala Nerus, Terengganu, Malaysia

DOI:

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

Keywords:

biodegradable polymers, polymer membranes, solid polymer electrolytes, sodium salt, electrical properties

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.

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