Excellent electrochemical performance
Low and stable potential
Graphite has a low lithium insertion potential, which is close to the reaction potential of lithium, which can make the battery output a higher voltage, and the potential platform is relatively stable during the charge and discharge process, which can ensure that the battery outputs electricity stably and provide stable power support for the device.
High specific capacity
Graphite has a high theoretical specific capacity. For example, the theoretical specific capacity of natural graphite can reach about 372mAh/g, and artificial graphite can also reach a high specific capacity level, which enables the battery to store more electricity and meet the user’s demand for device endurance.
High charge and discharge efficiency
The embedding and extraction process of lithium ions in the graphite crystal structure is relatively easy and fast, which can achieve a high charge and discharge efficiency, thereby shortening the charging time and improving the convenience of battery use.
Good cycle performance
During multiple charge and discharge cycles, the crystal structure of graphite is relatively stable, which can maintain a good capacity retention rate and extend the service life of the battery. Generally speaking, after hundreds or even thousands of charge and discharge cycles, batteries with graphite negative electrodes can still maintain a high capacity level.
Relatively low cost
Raw materials are abundant
Natural graphite is abundant in nature, widely distributed and easy to obtain; the raw materials for the production of artificial graphite, such as petroleum coke and needle coke, are also relatively sufficient and the source is relatively stable, which provides a solid raw material foundation for the large-scale production of graphite negative electrode materials.
Mature production process
After years of development and research, the production process of graphite negative electrode materials has become very mature, the technical difficulty in the production process is relatively low, the production efficiency is high, and the yield rate is also high, which helps to reduce production costs and makes graphite negative electrode materials have a higher cost performance in the market.
Good safety
Compared with some other negative electrode materials (such as lithium metal negative electrodes), graphite negative electrodes are safer during battery use. The chemical properties of graphite are relatively stable. Under normal charging and discharging conditions, it is not easy to undergo violent chemical reactions. It can effectively avoid dangerous situations such as thermal runaway, combustion, and explosion of batteries, and better meet the safety requirements of batteries in various application scenarios.
Good compatibility with electrolyte
Graphite negative electrode materials have good compatibility with common organic electrolytes, and can form a stable solid electrolyte interface (SEI) film on the graphite surface during battery charging and discharging. This film can prevent the electrolyte from further reacting with graphite, while allowing lithium ions to pass freely, thereby ensuring the normal operation and stable performance of the battery.
Strong process adaptability
The production process and performance characteristics of graphite negative electrode materials enable them to be well adapted to existing battery manufacturing processes and equipment. In the battery manufacturing process, graphite negative electrode materials have good processing performance and are easy to assemble and integrate with other battery components (such as positive electrode materials, diaphragms, etc.), reducing the difficulty and cost of battery manufacturing.