1. Lithium-ion battery is a rechargeable battery, which works mainly by the movement of lithium ion between the positive electrode and the negative electrode. In the process of charging and discharging, Li+ is intercalated and desorbed between the two electrodes: when the battery is charged, Li+ is desorbed from the positive electrode and intercalated into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state. The opposite is true when discharging. Generally, lithium-containing materials are used as electrodes, which is the representative of modern high-performance batteries.
2. Working principle: Lithium-ion battery uses carbon material as negative electrode and lithium-containing compound as positive electrode. There is no metallic lithium, only lithium ion. This is a lithium-ion battery. Lithium-ion battery refers to the battery with lithium-ion intercalation compound as cathode material.