Ni x Co 1-x (SO 4) 2. 6H 2 O, were synthesized from the slow evaporation of the solvent at
constant temperature. The presence of K, S, Ni, Co and O elements in the studied crystalline
structure was confirmed by EDS spectroscopy using a scanning electron microscope and
their quantification including Li was carried out with the help of ICP-OES technique. Raman
spectroscopy in the range 100− 3600 cm− 1, confirmed the presence of tetrahedral (SO 4) …