Lithium battery raw material coating equipment, drying equipment, disintegrating equipment

Release time:

2025-05-23 09:02

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The performance of lithium battery raw materials plays a decisive role in the overall performance of the battery. Taking the negative electrode material as an example, natural graphite has problems such as strong surface heterogeneity and many active sites. When lithium ions are embedded, solvent co-embedding is prone to occur, making it difficult to form a uniform and dense SEI film, and the wetting effect with the electrolyte is poor. During charging and discharging, the graphite layers are easily detached, resulting in a shorter battery cycle life; silicon-based anodes undergo extremely drastic volume changes during lithium deintercalation, which can cause the collapse and fracture of the material's structure, as well as electrode pulverization and detachment. In terms of cathode materials, ternary cathode materials are widely used in power batteries and small electronic products due to their high energy density and low cost. However, to further optimize their electrochemical performance, they usually need to be coated and modified to suppress irreversible phase transitions and transition metal ion dissolution, and reduce adverse and side reactions with the electrolyte.

The coating and modification machine uses the powerful airflow driven by operation to place the agglomerated powder particles in the stator with a special groove design. With the help of the shear force, friction force, and centrifugal force generated by the vortex, the material is quickly reduced to the original particle size or natural crystal form particles, achieving a full combination of the powder and the modifier, thereby completing the coating process.

In the processing of negative electrode materials, the coating and modification machine greatly improves the performance of the negative electrode material by building a protective layer on its outer layer. The carbon material with a core-shell structure formed after coating can avoid the co-embedding of lithium ions and solvents, suppress electrolyte decomposition, improve the first-charge reversible capacity, cycle stability, and rate performance of the negative electrode material, while reducing the risk of internal short circuits and thermal runaway, allowing the battery to remain stable and maintain good electrochemical performance over a wider temperature range.

When processing positive electrode materials, the coating and modification machine uniformly coats specific composite materials on the surface of the positive electrode material precursor or positive electrode material, improving the overall electronic conductivity and ultimately improving the battery capacity and cycle life.

While meeting the needs for higher coating rates, more uniform coating effects, and lower costs, it further improves the quality and production efficiency of lithium battery raw materials, helping the entire lithium battery industry to reach new heights.

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