Green simple preparation of LiNiO2 nanopowder for lithium ion battery

Abstract

This work aims at preparing LiNiO2 nanopowder using egg white as a chelating agent. Several experimental measurements applied to the samples like X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and FTIR spectroscopy. Analysis by XRD revealed crystalline particles of approximately 19−57 nm in diameter with hexagonal crystal structure. The lattice parameters (a and c) show a small change with calcination temperature and the lattice distortion c/a slightly decreased. The overall morphology of the LiNiO2 crystalline powder investigated by SEM and TEM, which indicated nanopowder with fine structure. The BET surface area of the synthesized crystalline powder was measured to be 11.7 m2/g, 9.07 m2/g, 8.79 m2/g, and 8.53 m2/g at calcination temperatures 0, 500, 600 and 700 °C, respectively. The FTIR spectra exhibit vibrational modes correlated with the vibrations of NiO6 and LiO6 octahedral units in the region 400 - 700 cm−1. Moreover, FTIR spectra for all the samples show peaks at 860 and 1430 cm−1 associated with Ni–O bond.