Abstract
In this study, citric-acid assisted spinel-type nickel–manganese oxide has been prepared using a solid-state reaction technique followed by calcination at 700 °C and 800 °C in the air atmosphere. X-ray diffraction results reveals the crystallinity with Fd3m cubic crystal symmetry. The irregular-shaped agglomerated morphology of particles of average size less than 1 µm is observed by scanning electron microscopy. The electrical resistance and conductivity are found to be 24.5 kΩ, 7.74 × 10−7 S mm−1, and 15.38 kΩ, 1.38 × 10−6 S mm−1 for NMO_700 and NMO_800 respectively, depicting the inverse relationship between resistance and conductivity. For electrochemical testing as anode, cyclic voltammetry (CV) and electrochemical impedance spectroscopy have been observed. CV results indicate the broad anodic peak at ~ 1.0 V while the cathodic peak at ~ 0.5 V for both the samples. The anodic/cathodic current for NMO-800 is higher than NMO-700 depicting the improved diffusion of Li+ as the calcined temperature alleviates.
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Acknowledgments
The authors gratefully acknowledge the DTU (Delhi Technological University) grant for financial support to the Lithium-ion Battery Technology (LIBT) lab, Department of Applied Physics, DTU, New Delhi to carry out this research work under the Project Grant Number: F. No. DTU/IRD/619/2019/2114.
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Jain, A., Panwar, A.K. & Tyagi, P.K. Synthesis, characterization, and electrochemical investigation of citric-acid assisted nickel manganese oxide as anode material. MRS Advances 7, 584–590 (2022). https://doi.org/10.1557/s43580-022-00293-4
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DOI: https://doi.org/10.1557/s43580-022-00293-4