Carbon material coated depolymerizer, composite modifier, shaping and mixing grinder

Release time:

2025-06-14 08:53

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Carbon materials, especially graphite-based materials, have become the basic raw materials for lithium-ion battery anode materials due to their good conductivity, stable charge-discharge platform, and low cost. Basic raw materials However, natural graphite has many surface defects and a large specific surface area, which leads to low initial efficiency. At the same time, when using PC-based electrolytes, serious solvated lithium-ion co-intercalation occurs, causing graphite layer expansion and exfoliation, and battery performance failure. In addition, the anisotropic characteristics of natural graphite allow lithium ions to only intercalate from the end face, resulting in poor rate performance and easy lithium deposition. These problems severely restrict the application of carbon materials in high-performance batteries.

Coating modification technology involves coating carbon materials with another substance. This coating effectively prevents the electrolyte from embedding into the negative electrode material, avoiding the phenomenon of graphite layer exfoliation caused by the embedding of solvent molecules. At the same time, the interlayer spacing of amorphous carbon and other coating materials is larger than that of graphite, which can improve the diffusion performance of lithium ions, forming a buffer layer of lithium ions on the outer surface of the graphite, greatly improving the rate performance of the material. In addition, surface coating can also constrain the volume expansion of the active centers of the electrode material, prevent the agglomeration of nano-active particles, and maintain the stability of the electrode material interface.

Honeycomb mill, as an advanced powder surface coating modification machine, has a unique working mechanism. During operation, the depolymerization wheel rotates at high speed, and the nano-powder material to be modified and hot air enter the honeycomb mill air volume chamber, where drying and depolymerization are achieved in the drying chamber, and the powder particles are crushed and dried at the same time. The depolymerized small particles enter the crushing chamber, and under the action of the high-speed rotating depolymerization wheel, the powder particles are fully dispersed and depolymerized. At this time, the modifier is injected into the mixing chamber in liquid form by compressed air, atomized and comes into uniform contact with the fully dispersed nanoparticles, forming a strong and complete coating film on the surface of the powder particles through a chemical reaction. 。 The coating rate can reach 99.2%, ensuring that the surface of the carbon material is fully and uniformly coated, greatly improving the material performance. and it can simultaneously achieve material grinding, drying, sorting, and chemical surface treatment of powder. In carbon material processing, multiple processes can be completed at once, improving production efficiency and reducing production costs.

The entire honeycomb mill continuous depolymerization and modification process is operated under negative pressure, with a high degree of continuity, no dust pollution, and the ability to achieve large-scale production. It is easy to operate, runs smoothly, has low labor intensity, and meets the requirements of modern industrial production for environmental protection and efficiency.

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