Low temperature synthesis of layered LiNiO2 cathode material in air atmosphere by ion exchange reaction
Abstract The layered LiNiO 2 cathode material for lithium ion battery was synthesized by ion-exchange reaction at low temperature in air atmosphere. The influence of synthesis conditions on the electrochemical performance of the resulting LiNiO 2 was investigated. The LiNiO 2 samples were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and infrared (IR) analysis. The results indicate that low temperature fabricated LiNiO 2 powders keep a single layered hexagonal structure and homogenous spheric shape like the raw material NiOOH. Charge and discharge tests show that the resultant LiNiO 2 exhibits good electrochemical properties. The first charge and discharge capacities of the sample are 183.4 mA h g − 1 and 169.5 mA h g − 1 at 0.5 mA cm − 2 , respectively. Galvanic charge/discharge and cyclic voltammetry tests reflect that LiNiO 2 electrode exhibits good cycle reversibility.