How To Control The Particle Size And Particle Size Distribution Of Lithium Battery Ternary Materials?

One of the important quality indexes of ternary materials is particle size and particle size distribution, which will affect the specific surface area, compaction density, compaction density, processing performance and point chemical properties of ternary materials. Therefore, the particle size and particle size distribution of ternary materials for lithium ion batteries should be strictly controlled.

Comparison of common grinding equipment

Comminution can be divided into comminution and grinding according to different particle sizes. Crushing refers to the process of breaking large materials into small pieces; Grinding refers to the process of grinding small pieces of materials into fine powder materials. In the selection of crusher, the type, hardness, particle size of incoming and outgoing materials, output and construction site shall be considered.

The ternary material is composed of 1 μ M U.M and the particle size of the secondary sphere is 3 ~ 40 μ m。 After the mixture of ternary material precursor and lithium source is calcined at high temperature in a sagger, it has a loss on ignition rate of more than 24%. Therefore, the material is severely hardened. It is necessary to first use a crushing equipment to crush a few centimetres of large materials into a few millimeters of small pieces, and then use a grinding equipment to grind a few millimeters of small pieces of powder into the final product.

Crushing process flow

The common process flow of ternary materials is: jaw crushing → roller crushing → air flow crushing. It should be noted that the pH value is greater than 10, which belongs to alkaline substances. The grinding equipment needs to be alkali resistant and wear-resistant.