The negative electrode material of lithium battery is one of the core materials in the manufacture of lithium battery, which mainly affects the charge and discharge efficiency and cycle performance of lithium battery.

　　So, what are the main anode materials?

　　1. the most used solution in the industry-graphite

　　Mainly natural graphite and artificial graphite, these two kinds of graphite have their own advantages and disadvantages. Natural graphite has high capacity, simple process and low price, but it has poor liquid absorption and circulation performance.

　　Artificial graphite has a complicated process and expensive price, but it has better circulation and safety performance.

　　2. the sudden emergence-graphene

　　Graphene is a two-dimensional crystal composed of carbon atoms, but only one layer of atomic thickness. It has the characteristics of thin texture, high hardness and fast electron movement.

　　In addition to expensive prices and complicated processes, graphene also requires an independent upstream and downstream industrial chain.

　　3. Stable performance but expensive-mesophase carbon microspheres

　　The mesophase carbon microspheres have stable structure and excellent electrochemical performance. However, it has a high production cost, a complicated process and is easy to be replaced, and it has not been developed too much.

　　It has higher magnification performance than natural graphite and artificial graphite, and has obvious advantages when used in aircraft models and power tools. Its thermal stability and chemical stability determine that it is not prone to chemical reactions and improve safety performance.

　　4. "New World" silicon carbon composite materials

　　The theoretical capacity ratio of silicon anode materials reaches more than 4200mAh/g, which is much higher than 372mAh/g for graphite anode materials. It has the defect that it is prone to serious expansion, which will cause the capacity to drop rapidly. Silicon-carbon composites are its only way out. Tesla, the world leader in the new energy vehicle market, began to adopt silicon-carbon composite materials.

　　Each of the above four anode materials has its own merits.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect substitute for lead-acid batteries and are the first choice in the energy storage industry.