Li[Ni0.2Li0.2 Mn0.6]O2 cathode materials have been synthesized by a microwave-assisted sol-gel method. The structure and electrochemical properties of Li[Ni0.2Li0.2 Mn0.6]O2 were studied by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and charge-discharge cycler. The powder prepared by microwave assisted sol-gel method showed good crystallinity and well-defined facet shapes. The Li[Ni0.2Li0.2Mn0.6]O2 electrode delivered a high discharge capacity of 230 mAhg-1 at the specific current of 40 mAg-1 (0.2 C rate) in the voltage range of 2.0~4.8 V. About 60 % of the discharge capacity measured at 0.2 C rate (140 mAhg-1) was maintained at a 6 C (1200 mAg-1) rate. The cyclic property was also stable and it did not deteriorated at a high C rate.
Keywords : Cathode, Lithium battery, Microwave, Electrochemical property, Sol-gel