Study on the Preparation of the Cathode Materials for Lithium-Ion Batteries by Multiphase Redox Method

We report a new method, which is called multiphase redox method, to prepare the cathode materials for lithium-ion batteries, such as LiCoO2 and LiMn2O4. Compared with other methods, multiphase redox method to prepare the cathode materials has greater advantages in both technology and cost. From a technical perspective, the reaction of embedding lithium was fulfilled in water solution and the ultrafine precursors with the structure of cathode materials could be obtained. In addition, the precursors were very uniform in chemical composition. Meanwhile, from a cost perspective, the raw materials to prepare cathode materials by multiphase redox method were the salts with relatively low price. This report studies the process conditions to prepare the precursors, the reaction mechanism, the sintering and the electrochemical performance of the sintered samples.