Overview of polymer lithium batteries

Polymer lithium battery overview The polymer lithium battery has the same structure as the liquid lithium battery and consists of an iH electrode, a negative electrode and an electrolyte. The working principle is basically the same. During the charging and discharging process, lithium ions are released between the positive and negative electrodes through the electrolyte with ionic conductivity, thereby realizing the conversion of chemical energy into electrical energy. The positive electrode material and negative electrode material are the same as the traditional liquid lithium battery, the difference lies in the use of polymer electrolyte. At present, the most researched polymer systems include polyoxyethylene (PEO) groups, polyacrylonitrile (PAN) groups, polymethyl acrylate (PMMA) groups, polyvinylidene vinylidene (PVDF) groups, etc. . Polymer lithium battery electrolyte is both an ionic conductor and an electronic insulator. It has a certain mechanical strength and can be used as a diaphragm material. Polymer lithium batteries use polymer electrolytes instead of electrolytes, allowing them to have the advantages of thinness, any area and any shape, and there will be no safety problems such as leakage, combustion, and explosion. Polymer lithium battery assembly can use plastic composite film to replace the traditional lithium battery stainless steel or casing, thereby greatly reducing the weight of the battery and increasing the battery capacity; the densification of the polymer can effectively prevent the dendritic deposits of the lithium positive electrode The formation of metal lithium as a negative electrode becomes possible, which is expected to greatly increase the electrochemical capacity of the battery. Polymer lithium batteries can also be used as positive electrode polymer materials, and it is expected that their quality and energy will be more than 50% higher than current lithium ion secondary batteries. The development direction of the lithium battery industry has always been to further improve the energy density, safety and environmental performance of the battery, reduce manufacturing costs as much as possible, and develop new electrode materials and lighter and thinner manufacturing processes. Polymer lithium batteries conform to the development trend of the lithium industry and are known as the next generation of lithium batteries. Since it was put into processing in 1999, its development speed has been faster than that of liquid lithium batteries, and polymer lithium batteries will continue to rise rapidly in the future. 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: Analysis of safety protection technology in the process of power lithium ion battery testing