Structural, Electrical, and electrochemical performance of FeMnO3 nanostructures for electrochemical storage devices and battery applications

Abstract

Uncapped-FeMnO_3, cationic surfactant (CTAB), anionic surfactant (SDS), and citric acid as a chelating agent-capped FeMnO₃ nanostructures were synthesized via the combustion route. The structural and electrochemical properties of the synthesized FeMnO₃ material were studied with the aid of XRD, FT-IR, SEM, and electrochemical impedance analysis. Using the XRD tool, the recorded diffraction peaks of all the synthesized FeMnO₃ compounds confirmed the formation of a cubic crystal structure. The aforementioned compound’s related vibrational bond and presence of elements were confirmed by FT-IR, EDX, and XPS studies. Spherical, elongated spherical, peanut shell, and porous spherical morphologies have been found for the uncapped, CTAB, SDS, and citric acid-capped FeMnO₃ nanostructures in the SEM studies. The average particle size of CTAB-capped FeMnO₃ was measured to be 20–25 nm by TEM analysis. The pore size and the surface area of the synthesized uncapped FeMnO₃ and CTAB-capped FeMnO₃ results were also discussed through BET analysis. Impedance spectra reveal that the dielectric constant, dielectric loss, tangent loss, real and imaginary parts of impedance, Cole-Cole plot, electrical conductivity, and electric modulus of FeMnO₃ material varied significantly under the influence of various temperatures. The aim of this present work is uncapped FeMnO₃ and the highest conductivity CTAB-capped FeMnO₃ has been taken as electrodes to scrutinize the electro-chemical redox potential shifts, and specific capacitance values varied under the processing of various scanning rates through cyclic voltammetry (CV) analysis for the first time. To make the construction of a battery using CTAB-capped FeMnO₃ was taken for testing the open circuit voltage (OCV).