The internal anode and cathode materials are activated by charging and discharging, and a good SEI film is formed on the surface of the anode.

The formation of lithium cell is the initialization of the battery, which activates the active material of the cell, which is a process of energy conversion. The formation of lithium cell is a complex process, and it is also an important process that affects the performance of batteries. Because the first time Li+ is charged, Li+ is first embedded in graphite, an electrochemical reaction takes place in the cell. It is referred to as solid electrolyte interface or said of SEI film.

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