Lithium-ion battery

Li-ion Battery is a rechargeable battery that mainly stores and releases energy through the intercalation and deintercalation of lithium ions (Li⁺) between the positive and negative electrodes. Due to its high energy density, long life, low self-discharge rate, and other advantages, it is now widely used in fields such as electric vehicles (EV), consumer electronics, and energy storage systems (ESS).
The working principle: When charging, lithium ions are stripped from the positive electrode → pass through the electrolyte → embed in the negative electrode (graphite). When discharging, lithium ions are stripped from the negative electrode → pass through the electrolyte → embed in the positive electrode material. This process is accompanied by the flow of electrons in the external circuit, forming an electric current.