What Is the Electrochemical Principle of Lithium Ion Batteries?

The main component of the positive electrode of the lithium ion battery is LiCoO2, and the negative electrode is mainly C.

• When charging: 

Positive electrode reaction: LiCoO2 → Li1-xCoO2 + xLi+ + xe-

Negative reaction: C + xLi+ + xe- → CLix

Total battery reaction: LiCoO2 + C → Li1-xCoO2 + CLix

• When discharging:

The reverse reaction of the above reaction occurs during discharge.