Application of Graphitization Furnaces in Lithium-ion Battery Anode Mat"&"erials
Artificial graphite is the most mainstream anode material for lithium-ion batteries, accounting for more than 70% of the market share. Graphitization is a key process in the production of artificial graphite, directly determining the elect"&"rochemical performance of the anode material.
Raw Materials and Processes
The main raw materials for artificial graphite anodes are:
- Needle coke: High-end artificial graphite raw"&" material with good anisotropy
- Petroleum coke: Mid-to-low-end artificial graphite raw material with low cost
Production process: Raw materials → Crushing → Granulation → Graphitization → Screening → Finished prod"&"uct
Graphitization of lithium-ion battery anode materials has the following characteristics:
- High Temperature: Typically 2800-3200℃; the higher the degree of graphitization,"&" the higher the capacity.
- Loading Method: Powder materials are loaded in graphite crucibles or graphite boxes.
- Large Batch Size: Single furnace processing capacity can reach tens of tons (box furnace)."&"
- High Power Consumption: Graphitization costs account for 40-50% of the total cost of artificial graphite.
Performance Indicators
Graphitization quality directly affects the performance of anode materials:"&"
- Specific Capacity: The higher the degree of graphitization, the closer the reversible capacity is to the theoretical value of 372mAh/g
- First-cycle Efficiency: High graphitization degree is benefic"&"ial to improving the first-cycle charge-discharge efficiency
- Cycle Performance: Good graphitization uniformity results in a long cycle life
Market: The explosive growth of new energy vehicles has driven a surge in demand for artificial graphite anode materials. Graphitization is the most expensive process in artificial graphite production and also a bottleneck in production "&"capacity. The energy efficiency and production capacity of graphitization furnaces are the core competitiveness of anode material companies.
