What are the general preparation methods for lithium battery cathode materials

Generally, a lithium salt such as lithium carbonate and a cobalt compound or a nickel compound are ground and mixed, and then sintered. The advantage of this method is that the process flow is simple and the raw materials are easily available. It belongs to the method that has been extensively researched, developed and processed in the early stage of lithium battery development. Foreign technology is relatively mature; the disadvantage is that the prepared cathode material has limited capacitance, poor mixing of raw materials, and performance of the prepared material. The stability is not good, and the quality consistency between batches is poor. 2. Complex method The complex method uses organic complexes to first prepare complex precursors containing lithium ions and cobalt or vanadium ions, and then sinter to prepare them. The advantages of this method are molecular-scale mixing, material averageness and performance stability, and the positive electrode material has a higher capacitance than the solid-phase method. It has been experimentally used as an industrial method for lithium batteries in foreign countries, and the technology is not mature. There are currently few reports in China. . 3. The sol-gel method uses the method of preparing ultrafine particles developed in the 1970s to prepare cathode materials. This method has the advantages of the complex method, and the capacitance of the prepared electrode materials is greatly improved. A method that is rapidly developing at home and abroad. The disadvantage is that the cost is high and the technology is still in the development stage. 4. The LiMnO2 prepared by the ion exchange method has a high reversible discharge capacity of 270mAh/g. This method has become a new research focus. It has the characteristics of stable electrode performance and high capacitance. However, the process involves energy-consuming and time-consuming steps such as solution recrystallization and evaporation, which is far from practical. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Will the service life of the lithium battery be longer when the UPS battery is replaced?