What is graphite negative electrode material?
Graphite anode material is one of the core components of lithium-ion batteries, primarily responsible for storing and releasing lithium ions. Graphite anode material is mainly graphite, including artificially synthesized graphite and natural graphite that has undergone special processing and treatment. As the active substance in the battery anode, graphite enables the reversible intercalation and deintercalation of lithium ions during charging and discharging through its distinctive layered structure, thereby facilitating energy storage and release.
Technological innovation requirements for graphite anode material processing
With the rapid development of the global new energy industry, lithium-ion batteries, as a core energy storage medium, are imposing increasingly stringent performance requirements on graphite anode materials. The processing quality of graphite anode material directly determines battery energy density, cycle life, and safety, while grinding and classification – critical stages in the preparation process – urgently demand more efficient and environmentally friendly solutions. Traditional mechanical grinding equipment faces challenges such as high energy consumption, uneven particle size distribution, and limited product purity, struggling to meet the production requirements of high-end anode material. Against this backdrop, air classifier mill has emerged as an ideal choice for graphite anode material manufacturers to achieve technological upgrading, leveraging their unique technical advantages.
The core advantages and application value of air classifier mill
● Integration of ultra-fine grinding and precise classification: It can complete the processing of graphite raw material from coarse grinding to ultra-fine powder at the micron/sub-micron level in one step, and the particle size distribution is concentrated (the controllable range of D50 around 3-20 μm), significantly improving the tap density and consistency of specific surface area of the anode material.
●Energy-saving and high efficiency：Grading treatment avoids over-grinding, reduces energy consumption (about 20-30% reduction), and improves production efficiency.
● Efficient dispersion and shaping: Air classifier mill is with a built-in turbine classifier and a flow guiding device, which can effectively break up the agglomerated particles of graphite. Through the effects of impact and shearing, it can shape the particles. For example, it can process spherical graphite into a “potato-like” shape to optimize the performance of the battery.
● Low-temperature processing: The fully enclosed airflow circulation system avoids heat generation from mechanical friction. This ensures the integrity of graphite crystal structure, reduces oxidation or interlayer defects caused by high temperature, and enables the charging and discharging stability of the battery.
● No metal pollution and high purity: There is no contact with metallic media, eliminating the introduction of impurities such as iron and nickel, and meeting the stringent requirements for material purity of power batteries (the iron content can be controlled below 10 ppm).
Notes
1) In order to prevent wear of key components, such as the grinding chamber and classifying wheel, it is recommended to use tungsten carbide or ceramic materials, and monitor the particle size distribution regularly.
2) Strictly use inert gas protection (such as nitrogen) for grinding to ensure that the content of magnetic foreign matter is less than 50ppm.
3) The classified ultra-fine particles (<3μm) can be recycled for use in silicon-carbon composite negative electrodes to improve raw material utilization.
บทสรุป
Under the competitive trend of “improving quality and reducing costs” in the lithium battery industry, graphite anode material processing enterprises need to build core competitiveness through technological innovation. Air classifier mill, with its remarkable advantages of high efficiency, energy conservation, and environmental protection, can not only solve the pain points of traditional processes, but also assist enterprises in producing high-end products that meet the demands of new-generation anode material, such as high-nickel ternary and silicon-carbon composite, making a greater contribution to the vigorous development of the lithium-ion battery industry.
บริษัท ชิงเต่าอีพิคผงเครื่องจักร จำกัด is a professional manufacturer of powder processing equipment with many years of production experience and technical accumulation. Our products include: powder grinding equipment, classifying equipment, modification equipment and related auxiliary equipment. Air classifier mill is one of our products, which includes 4 types: เอ็มเจดับบลิว-ดับบลิว, เอ็มเจดับบลิว-แอล, เอ็มเจดับบลิว-เอ, และ เอ็มเจแอล-ดับบลิว, with stable performance and reasonable price, and they have received many good reviews from customers over the years, especially MJW-W type, performance is comparable to that of German ZPS air classifier mill.
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