beta phase manganese dioxide nanorods Synthesis and characterization for supercapacitor applications

TL;DR

This paper reports the synthesis of beta phase manganese dioxide nanorods via a novel solution method and evaluates their potential as supercapacitor electrode materials, demonstrating promising electrochemical performance.

Contribution

The study introduces a new solution synthesis route for beta MnO2 nanorods and thoroughly characterizes their structure and electrochemical properties for supercapacitor applications.

Findings

Nanorods have diameters of 10-14 nm and lengths of about 50 nm.

The material exhibits a specific capacitance of approximately 125 F/g.

Phase purity confirmed by FTIR and TGA analyses.

Abstract

Manganese dioxide nanorods were synthesized using novel solution route. The phase and microstructure of synthesized materials were identified using X ray diffraction, scanning electron and transmission electron microscopic measurements. The material crystallizes into beta crystallographic phase and consists of nanorods of diameter in the range of about 10-14 nm and length about 50 nm. The Fourier Transform Infrared (FTIR) spectroscopic and thermogravimetric analysis (TGA) measurements were carried out to understand the materials microscopic and thermal properties. The material exhibits characteristic Mn O vibrational frequencies, confirming the phase purity of material. The electrochemical performance of beta MnO2 nanorods was evaluated using cyclic voltammetry and galvanostatic charge and discharge measurements using inhouse developed supercapacitor device assembly. We observed about 125 F per g specific capacitance for beta MnO2 nanorods electrode materials.