Synthesis and electrochemical characteristics of almost stoichiometric nanosized cathode materials Li1-xNi1+xO2 with a combination of sol-gel and solid-phase methods

Abstract

We have found approaches to the synthesis of cheap near-stoichiometric lithium nickelate (LiNiO2). The resulting phases have been identified by X-ray phase analysis. Obtained materials have been studied by spectrometric method; electron microscopy; BET method; impedance spectroscopy. A technological scheme has been developed, the optimal conditions for the combined synthesis of lithium nickelate close to the stoichiometric composition Li0.98Ni1.02О2 have been determined. We have proved that nanosized samples with a well-developed surface form during such a synthesis. We have determined that the electrochemical characteristics of the samples correspond to those of lithium nickelate used in commercial electrochemical cells.