Abstract
LiFexNi1-xO2 (0.00 ≤ x ≤ 0.20) nanoparticles were synthesized by sol–gel method using aqueous solution of metal nitrate precursor at 600 °C for 10 h. Structure and physical properties were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), Transmission electron microscope (TEM) and X-ray photoelectron microscopy (XPS) analysis. XRD studies revealed a well defined layer structure and a linear variation of lattice parameters with the substitution of Fe confirms phase pure compounds in a rhombohedral structure for all the materials. The surface morphology and particle size changes brought about by the substitution of Fe in LiFe0.15Ni0.85O2 using SEM and TEM analysis. Electrochemical properties of the as prepared LiFexNi1-xO2/Li/LiPF6 in assembled cells were studied by charge/discharge, cyclic performance and different discharge rates. LiFe0.15Ni0.85O2 shows better electrochemical properties than LiNiO2 with the highest charge/discharge capacity (214/191 mAh/g) discharge rate of 0.5-C among LiFexNi1-xO2 (0.00 ≤ x ≤ 0.20). LiFe0.15Ni0.85O2 was superior electrochemical properties, such as high charge/discharge capacity, high coulombic efficiency and low irreversible capacity.
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The authors thank to Department of Physics, Alagappa University Karaikudi for providing the XRD analysis to carry out this research work.
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Mohan, P., Kalaignan, G.P. Structure and electrochemical performance of LiFexNi1-xO2 (0.00 ≤ x ≤ 0.20) cathode materials for rechargeable lithium-ion batteries. J Electroceram 31, 210–217 (2013). https://doi.org/10.1007/s10832-013-9815-y
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DOI: https://doi.org/10.1007/s10832-013-9815-y