Microrods synthesized of MoO3 with corn straw as biological templates and its electrochemical performance in aqueous aluminum-ion battery

J Sun,X Wang,J Cao,C Li,M Gong,Y Dong

doi:10.4314/bcse.v35i3.17

Abstract

ABSTRACT. In this paper, MoO3 microrods were prepared using corn straw as biological template via roasting process The components and crystal characterization of the material were investigated via X-ray diffraction (XRD)，scanning electron microscopy (SEM), and the electrochemistry property and mechanism were studied. The results showed that the MoO3 material synthesized by template method is orthorhombic structures. The MoO3 particles were submicron and micron rods with uniform distribution and a smooth surface. MoO3 microrods had an average diameter that ranged from 1 to 2 μm. The result indicated that the MoO3 as the new negative of aluminum battery delivers a higher discharge capacity of 190 mA·h·g-1 at a scanning rate of 1 mV·s-1, which showing good capacity and cycling performance.  KEY WORDS: Biological template, Corn straw, Aqueous aluminum-ion battery, MoO3  Bull. Chem. Soc. Ethiop. 2021, 35(3), 669-675. DOI: https://dx.doi.org/10.4314/bcse.v35i3.17

Highlights

With growing concern about the environment, climate change and a sustainable energy supply, studies have been focused on the development of green energy storage systems with high volumetric energy density, low price and improved safety
Electrochemical characterization of the MoO3 sample was carried out using three-electrode cells, in which a Graphite rod and an Ag-AgCl electrode served as a counter and reference electrodes
X-ray diffraction (XRD) measurement was first used to study the phase and lattice modification of the biotemplated MoO3(II) and the MoO3(I) sample prepared by solid state reaction

Summary

Introduction

With growing concern about the environment, climate change and a sustainable energy supply, studies have been focused on the development of green energy storage systems with high volumetric energy density, low price and improved safety. Orthorhombic molybdenum trioxide (α-MoO3) has been extensively investigated as a key material for fundamental research and technological applications in photocatalyst, solar cells and electrochemical storage. Aqueous aluminum ion batteries have become a hot spot for research because of the good safety performance, simple production and non-toxic electrolyte, high ionic conductivity and environmental friendliness [8,9,10,11]. Molybdenum trioxide (MoO3), as a potential negative electrode material has a lot of advantages, such as high electrochemical activity, low cost, and environmentally friendly nature [12, 13].

Results

Conclusion