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Overview of polymer lithium ion battery

by:dcfpower     2021-02-26
u003cpu003e Polymer lithium ion batteries have the same structure as liquid lithium ion batteries. They are composed of basic parts such as iH poles, negative electrodes, and electrolytes. The working principles are basically the same. During the charging and discharging process, lithium ions must pass through with ion conductivity. The electrolyte is inserted and extracted between the positive and negative electrodes to realize the transformation from chemical energy to electrical energy. Among them, the positive and negative materials are the same as those of conventional liquid lithium-ion batteries. The difference lies in the use of polymer electrolytes. Currently, the most studied polymer systems are polyethylene oxide (PEO) based, polyacrylonitrile (PAN) based, and polymethyl propylene. PMMA based, PVDF based, etc. Polymer lithium ion battery electrolyte is both an ionic conductor and an electronic insulator, and has a certain mechanical strength, so it can act as a separator material. u003c/pu003eu003cpu003eu003c/pu003eu003cpu003e Polymer lithium ion batteries use polymer electrolytes instead of electrolytes, making them have the advantages of thinning, arbitrary area and arbitrary shape, and no leakage Safety issues such as liquid, combustion and explosion. The outer packaging of polymer lithium-ion batteries can use Shao plastic composite film to replace the stainless steel or high-quality shell of traditional lithium-ion batteries, thereby greatly reducing the weight of the battery and increasing the specific capacity of the battery; because the polymer solution can effectively prevent branches The formation of lithium-like deposits on the lithium negative electrode makes it possible to use metallic lithium as a negative electrode, which is expected to greatly increase the electrochemical capacity of the battery; polymer lithium ion batteries can also use polymer materials as positive electrode materials, which is expected The mass specific energy will be increased by more than 50% compared to the current lithium ion secondary batteries. The development direction of the lithium battery pack industry has always been to further improve the energy density and safety and environmental performance of the battery and reduce the manufacturing cost as much as possible, research and develop new electrode materials and new lighter and thinner manufacturing processes. The polymer lithium battery pack conforms to the development trend of the lithium industry and is known as the next generation of lithium-ion batteries.' Since it was put into production by Sony in 1999, its development speed has been higher than that of liquid lithium-ion batteries. In the future, polymer lithium-ion batteries will Continue to maintain the momentum of rapid growth.u003c/pu003eu003cpu003eu003cpu003eu003c/pu003eu003c/pu003eu003c/pu003e
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