Lithium-ion batteries have good overall performance and are the preferred energy component for consumer electronics, electric vehicles and even energy storage industries.

　　Although lithium-ion batteries have been widely used, there are still many ordinary consumers who do not understand lithium-ion batteries. Let’s explain what is a lithium-ion battery? How does it work?

　　Lithium-ion battery is a secondary battery (that is, a battery that can be repeatedly charged and discharged), which mainly relies on the movement of lithium ions between the positive electrode and the negative electrode.

　　During the charging and discharging process, Li+ (lithium ions) intercalates and deintercalates back and forth between the two electrodes, because the energy of lithium ions is different when stored in the positive and negative materials, and the energy difference is the storage/release of the lithium battery Electricity: When charging, Li+ is deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte. The negative electrode is in the lithium-rich state, and the positive electrode is in the de-lithium state; the opposite is true when discharging. The most classic solution is lithium cobalt oxide cathode-graphite anode.

　　The basis of the battery is electrochemical science. It has a simple but most basic principle: For any kind of battery, the mechanism of storing energy needs to write a corresponding electrochemical reaction equation, so that the voltage situation can be known and the theoretical limit can be judged. Basic information such as energy density.

　　In a lithium cobalt oxide battery, taking the charging process as an example, the specific reactions of the positive and negative electrodes are as follows:

　　LiCoO2=Li1-xCoO2+xLi+xe-

　　6C+xLi+xe-=LixC6

　　No matter how advanced or special a certain battery technology is, its principle must be able to be written as a chemical equation and implemented on paper, so that it can stand the test of common sense in the academic world.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.