Preparation of lithium nickel manganese oxide cathode material for 5V-class high-voltage batteries by a microwave heating method

摘要

Lithium nickel manganese oxide cathode material, LiNi_0.5Mn_1.5O₄, was prepared by an improved microwave heating method. Prepared cathode materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and charge–discharge measurements. XRD results indicated that single-phase LiNi_0.5Mn_1.5O₄ powders were obtained under the optimized preparation conditions. SEM investigation demonstrated that the powders had an octahedron shape and a particles size of about 200–300 nm. The obtained LiNi_0.5Mn_1.5O₄ exhibited good electrochemical performance and delivered an initial discharge capacity of 145 mAh g?1 at a current density of 20 mAg?1.