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  • Chem Sci Trans., 2015, 4(4),  pp 1031-1036  

    DOI:10.7598/cst2015.1016

    Research Article

    Structural and Morphological Characterization of Mg Doped LiNiO2 Cathode Materials for Lithium-Ion Batteries

  • N.MURALI, K.VIJAYA BABU, K.EPHRAIM BABU and V.VEERAIAH*
  • Department of Physics, Andhra University, Visakhapatnam-530 003, India
  • Abstract

    The layered structure LiMO2 (M=Co, Ni and Mn) cathode materials for lithium ion batteries are under intensive investigation world-wide. In the present study, magnesium doped LiNiO2 (LNO) samples with the chemical composition of LiNi1-xMgxO2 (x= 0.02, 0.04, 0.06 and 0.08) are prepared by solid state reaction method at 775 oC for 20 h in air atmosphere. The crystal structure, morphology and bonding nature of the synthesized materials are systematically characterized by X-ray diffraction; field effect scanning electron microscopy and Fourier transform infrared spectroscopy. The Mg doped LiNiO2 are found to have hexagonal structure of the α-NaFeO2 (space group, R3m ) from the XRD. From FESEM micrographs, it is found that the smooth and uniform particle size is in the range of 0.88-2.35 μm. The FT-IR shows the presence of two broad vibrational bands between 400 to 1000 cm-1 corresponding to the trigonally LiO6 and MO6 octahedra sites.

    Keywords

    Layered structure, Lattice constant, Particle size and FT-IR

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