SYNTHESIS AND ELECTROCHEMICAL ANALYSIS FOR NIMN2O4 AS ANODE MATERIAL IN LITHIUM-ION BATTERIES

Abstract

Lithium-Ion Batteries (LIBs) have become a rising energy storage solution for various applications, ranging from compact and portable electronics to electric vehicles. Since, the demand for these rechargeable batteries is increasing day by day. Hence, there is a need for new and highly efficient electrode and electrolyte materials to enhance the overall performance of LIBs. Transition metals, known for their ability to exhibit variable oxidation states, are ideal candidates for anode materials. Among these, mixed transition metal oxides (MTMOs) have gained significant attention for their potential to improve battery performance. In this study, spinel type NiMn2O4 (NMO) has been synthesised using a citric acid-assisted solid-state method. The X-ray diffraction patterns of the synthesized materials confirm the formation of the proper phase with Fd3m cubic crystal symmetry. The SEM and TEM analysis revealed the particle size and morphology of NMO, showing well-defined hexagonal-shape structure. The electrochemical properties such as Li-ion charge transfer resistance, redox potentials, charge discharge capacities cyclability and Li-ion diffusion coefficient of NMO in Li half-cell has been measured using Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV), and Galvanostatic Charge-Discharge (GCD)