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<p>Lithium-ion batteries (LIBs) have become a rising energy storage solution for various applications, ranging from compact and portable electronics to electric vehicles. 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 have gained significant attention for their potential to improve battery performance. In this study, spinel type NiMn<sub>2</sub>O<sub>4</sub> (NMO) has been synthesized 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 crystallite size of NMO has been estimated by Scherrer and W–H plot relationships. SEM and TEM analyses revealed the particle size and morphology of NMO, showing a 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, Cyclic Voltammetry, and Galvanostatic Charge-Discharge.</p> Graphical Abstract <p></p>

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Study of Lithium-Ion Diffusion Coefficients Through Analysis of CV and EIS for NiMn2O4 Alternate Anode Material in Lithium-Ion Batteries

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Sweta Mehra,
  • Sharad Singh Jadaun,
  • Anil Kumar,
  • Amrish K. Panwar

摘要

Lithium-ion batteries (LIBs) have become a rising energy storage solution for various applications, ranging from compact and portable electronics to electric vehicles. 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 have gained significant attention for their potential to improve battery performance. In this study, spinel type NiMn2O4 (NMO) has been synthesized 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 crystallite size of NMO has been estimated by Scherrer and W–H plot relationships. SEM and TEM analyses revealed the particle size and morphology of NMO, showing a 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, Cyclic Voltammetry, and Galvanostatic Charge-Discharge.

Graphical Abstract