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Electrochemical performance of La2O3-coated layered LiNiO2 cathode materials for rechargeable lithium-ion batteries

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Abstract

Uncoated and La2O3-coated LiNiO2 cathode materials were synthesized by polymeric sol gel process using metal nitrate precursors at 600 °C for 10 h. The structure and electrochemical properties of the surface-coated LiNiO2 materials were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry, charge/discharge and electrochemical impedance spectroscopy techniques. X-ray powder diffraction and SEM result show that no significant bulk structural differences were observed between the lanthanum oxide coated and pristine LiMn2O4. The galvanostatic charge/discharge studies on the uncoated and lanthanum oxide-coated LiNiO2-positive material at 0.5-C rate in the potential range between 3 and 4.5 V revealed that lanthanum oxide-coated positive electrode material has enhanced charge/discharge capacities; 2.0 wt.% of lanthanum oxide-coated LiNiO2-positive material has satisfied the structural stability, high reversible capacity and high electrochemical performances.

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Acknowledgments

The authors thank the Department of Physics, Alagappa University, Karaikudi for providing the XRD analysis to carry out this research work.

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Correspondence to G. Paruthimal Kalaignan.

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Mohan, P., Kalaignan, G.P. Electrochemical performance of La2O3-coated layered LiNiO2 cathode materials for rechargeable lithium-ion batteries. Ionics 19, 895–902 (2013). https://doi.org/10.1007/s11581-012-0821-x

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  • DOI: https://doi.org/10.1007/s11581-012-0821-x

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