Introduction to the working principle of lithium batteries

Introduction to the working principle of lithium batteries The charging and discharging process of lithium batteries is the process of Li+ intercalation and deintercalation in the positive and negative materials accompanied by the absorption and release of energy. Charge the lithium battery: Li+ is deintercalated from the positive electrode material, reaches the negative electrode through the electrolyte, absorbs electrons, and is embedded in the negative electrode material to form a higher energy intercalation compound. Lithium battery discharge: Li+ deintercalates from the negative electrode material and releases electrons, Li+ reaches the positive electrode through the electrolyte, and then inserts into the positive electrode material to form a relatively stable intercalation compound after absorbing electrons. Lithium battery is a kind of rechargeable battery, which relies heavily on the movement of lithium ions between the positive and negative electrodes to work. During the charging and discharging process, Li+ intercalates and deintercalates back and forth between the two electrodes: when recharging the battery, Li+ deintercalates from the positive electrode and inserts into the negative electrode through the electrolyte. The negative electrode is in a lithium-rich state; the opposite is true during discharge. Generally, batteries that use materials containing lithium as electrodes are representative of modern high-performance batteries. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure. It has many micropores. The lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are inserted, the higher the charging capacity. Similarly, when the battery is discharged, the lithium ions embedded in the carbon layer of the negative electrode are released and move back to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Analysis of the principle of hydrogen new energy fuel power cell