Is spray drying used in the preparation of lithium ion battery materials?

Li Yangxing et al. used a mixed solution of lithium acetate and cobalt acetate as a precursor, and the mixed powder prepared by spray drying method was heat-treated to obtain LiCo02 ultrafine powder. LiCo02 powder has a uniform distribution and a particle size of 200-700 nm. It was found that LiCoO 2 obtained by this method has excellent electrochemical activity by assembling its test battery to test its charge and discharge capacity. ZhaoyinWen et al. used Li2C03 and rutile type Ti02 as precursors. Through the spray drying and heat treatment process, spherical porous Li4Ti5O12 powder with a particle size of several micrometers was used, which was 100-300 °C lower than the common mechanical mixture solid state reaction method. An electrode material having excellent properties is obtained at a heat treatment temperature. The spray drying method can also obtain an ultrafine powder having a coated structure from a multicomponent precursor, such as TiO2-Ce02, TiO2-Sn02, and TiO2-ZnO coated ultrafine powder having a particle size of 10 μm or less.

The spray drying method has the characteristics of rapid drying process, high production efficiency and high yield, and has certain advantages in preparing electrode materials on a large scale. However, there are some technical difficulties to be solved in the spray drying method: ensuring that the obtained material has a high spherical degree, a suitable particle size, and improving the product vibration density and particle fluidity; The prepared product has uniform chemical composition, the ratio of elements meets the requirements, and the electrochemical properties of the material are stable. This method can be generalized in the preparation of different electrode materials.

The page contains the contents of the machine translation.