What materials are in 18650 batteries.
The main materials of batteries include positive electrode materials, negative electrode materials, separators, electrolytes, etc?. Common positive electrode materials include ternary materials, lithium iron phosphate, lithium cobalt oxide, and lithium manganese oxide, while negative electrode materials mainly include artificial graphite and silicon carbon negative electrodes. Diaphragm can be divided into wet and dry methods according to technical routes, with wet membranes being more suitable for high-energy density batteries. Electrolyte is composed of organic solvents and electrolyte salts, used for conducting current?.
Specific materials and their functions
Positive electrode material
Three element materials A multi-element metal composite oxide composed of nickel, cobalt, manganese (or aluminum), with high energy density, widely used in passenger cars.
Lithium iron phosphate Low raw material cost, good recyclability and safety, mostly used for buses and logistics vehicles.
Lithium cobalt oxide High energy density, but expensive and not environmentally friendly, mainly used for 3C electronic products.
Lithium manganese oxide Rich in resources and cheap in price, but with poor cycling and severe high-temperature degradation, a small amount is used for power batteries? 1.
Negative electrode material
Artificial graphite It has good recyclability, safety, and compatibility with electrolytes, with an initial efficiency of up to 93%, making it the mainstream negative electrode material at present.
Silicon carbon negative electrode The theoretical capacity is as high as 4200mAh/g, which can meet the requirements of high battery life. However, due to factors such as price, it is still in the import period?.
Diaphragm:
Wet process diaphragm More suitable for high-energy density batteries, currently accounting for 73% of the market share.
Dry process diaphragm Low technical threshold, but suitable for low-energy density batteries? 1.
Electrolyte： Composed of organic solvents and electrolyte salts, used for conducting current, with various types of additives that can significantly improve electrolyte performance?.
