The structure and composition of lithium battery Lithium battery charging and discharging principle

Structure of Lithium Battery Lithium battery is an alternative product of metal lithium battery that appeared in the past few years. The main components of the battery are positive and negative electrodes, electrolyte, separator and casing. Positive electrode-A carbon electrode that can absorb lithium ions is used. When discharged, lithium becomes lithium ions, which leave the anode of the battery and reach the cathode of the lithium battery. For the negative electrode-material, select the lithium compound that can be inserted as close as possible to the lithium potential. For example, various carbon materials include natural graphite, synthetic graphite, carbon fiber, mesophase sphere carbon, etc. and metal oxides. Electrolyte-a mixed solvent system that uses LiPF6 ethylene carbonate, propylene carbonate and low-viscosity diethyl carbonate and other alkyl carbonates. Diaphragm-the use of polyolefin microporous membranes such as PE, PP or their composite membranes, especially the PP/PE/PP three-layer membrane not only has a lower melting point, but also has a higher puncture resistance, which plays a role in heat insurance. Lithium battery charging and discharging principle The working principle of lithium battery refers to its charging and discharging principle. 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 that reach the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are inserted, the higher the charging capacity. It is not difficult to see that during the charging and discharging process of lithium batteries, lithium ions are in a state of movement from positive to negative to positive. If we compare the lithium battery to a rocking chair, the two ends of the rocking chair are the two poles of the battery, and the lithium ion is like an excellent athlete running back and forth on both ends of the rocking chair. Therefore, the experts gave the lithium battery a lovely name, rocking chair battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Should I choose a lithium battery or a lead-acid battery for electric vehicles?