The preparation technology of ternary cathode powder and its influence on the structure

Dry! The preparation process of ternary cathode powder and its influence on its structure are reviewed. With the development of data physical chemistry and powder data preparation technology, it is found that high-performance ternary cathodes need to be based on battery structure, primary crystal structure, and secondary crystal structure. Four aspects of particle structure, data surface chemistry and mass discharge are customized. Grease synthesis technology. Since 2010, Fenggu Energy Conservation New Energy Technology Research Institute Ternary Positive Lithium Battery Laboratory has begun to develop high-performance secondary battery electrode data. Optimizing the process flow at the beginning can make the data show more excellent functions, and better meet the requirements of the lithium battery operation to correct the data. For high-activity, high-density spherical nickel-hydrogen nickel batteries and ternary cathode batteries, a new process for controlling crystallization to prepare cathode data is proposed. By adjusting the battery structure, primary crystal grain structure, secondary crystal grain structure and data morphology of the battery, the function of the cathode data is optimized to meet the requirements of the electrode and the cathode data of the battery. The above four layers have different contributions to data functions. The lattice structure of the first layer, the basic unit structure of the crystal, the important thing is the dynamic structure of doping and operation optimization, the transmission channel of ionic substances, and then the ability to travel conductance/ionic conductance or the data structure, and then travel the multiplier function and The ability to circulate functional data. The second aspect is the crystal shape of individual particles. After controlling the synthesis conditions, the important direction increases, and the crystal grain standard and superimposed crystal mode change. This layer optimizes the electrochemically active/inert interface area, the stress release path, and the lithium ion diffusion path, which in turn optimizes the battery's multiplier function, cycle stability and energy density. The third layer is the structure of two particles. These two particles are particles composed of integrals and a bunch of elementary particles. The density of primary particles, the size and distribution of secondary particles can all be changed. Optimize this layer to get the best information about production function, compaction density, particle mechanical strength, and then get the energy density of the travel battery. The fourth aspect is the physical chemistry of data. It mainly refers to the gradient of the external coating and the concentration of external elements. The optimization of data surface chemistry can greatly improve the usefulness of data. In practice, the above four levels are interrelated and interrelated. For example, a good paint operation helps to improve the chemical appearance of the powder. 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 fast charging affect battery life?