Lithium-ion battery is a battery that can be charged and discharged multiple times. The working principle is to realize the charging and discharging function by directional movement of lithium ions (Li+) between the positive and negative electrodes.

　　There are many types of lithium-ion batteries. According to the different cathode materials, they can be divided into lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminate, etc.; according to the different electrolytes, they can be divided into liquid lithium battery and polymer battery.

　　The lithium-ion battery industry chain is mainly composed of three parts: upstream participant raw material suppliers, midstream participant lithium battery manufacturers, and downstream end customers.

　　The upstream of lithium-ion batteries includes suppliers of cathode materials, anode materials, electrolyte materials, and separators; the midstream companies are lithium-ion battery manufacturers that process upstream raw materials to produce lithium battery cells of different specifications; downstream are Users can be divided into three categories according to the purpose of use: energy storage, power, and consumption.

　　Lithium-ion battery materials mainly include four main materials: positive electrode material, negative electrode material, electrolyte and separator. Other materials include aluminum plastic film and conductive agent.

　　The choice of cathode material is the main factor affecting the energy density and safety of lithium batteries, and it also determines the total cost of lithium batteries.

　　The current mainstream batteries are mainly lithium iron phosphate and ternary materials. Both have their own characteristics. Lithium iron phosphate is rich in raw materials, relatively low in price, environmentally friendly, coupled with good cycle performance and high safety, and has advantages in the fields of commercial vehicles, special vehicles and energy storage; energy density of ternary materials High, with great potential for future development in the passenger car field.

　　Lithium-ion battery anode materials are mainly divided into two types: carbon materials and non-carbon materials. Among the carbon materials, graphite is the main negative electrode material for lithium-ion batteries; non-carbon materials include titanium-based materials and silicon-based materials.