Classification and development trend of polymer lithium batteries

According to different electrolyte data used by lithium batteries, lithium polymer batteries can be divided into liquid lithium batteries (referred to as LIB) and polymer lithium batteries (referred to as LIP). The polymer lithium battery uses the same positive and negative data as the liquid lithium ion, and the battery works on the same principle. The important difference lies in the electrolyte. Lithium batteries use liquid electrolytes, while lithium-ion polymer batteries use solid polymer electrolytes, which can be dry or colloidal. Polymer lithium batteries can be divided into three categories: (1) Solid electrolyte lithium batteries. The electrolyte is a mixture of polymer and salt. The battery has low ionic conductivity at room temperature and is suitable for high temperature applications. (2) Gel polymer electrolyte lithium battery. That is, a plasticizer is added to the solid polymer electrolyte, and then the ion conductivity is increased, so that the battery can be used at room temperature. (3) Lithium battery with polymer cathode data. Using conductive polymer as the cathode material, the specific energy is three times that of existing lithium batteries, and it is the latest generation of lithium batteries. Liquid electrolytes and solid electrolytes are replaced. In contrast, liquid lithium batteries, polymer lithium batteries have thin shapes, any areas with arbitrary shapes and other benefits, and there will be no leakage and fire and explosion safety issues, so that the battery case, Lu Shipingsu composite membrane can then increase the specific capacity of the entire battery; polymer lithium batteries can also use polymers as anode data, and their mass-energy ratio will be more than 50% better than current liquid lithium batteries. In addition, polymer lithium batteries are better than lithium batteries in terms of operating voltage and charge-discharge cycle life. Based on these advantages, polymer lithium batteries are called next-generation lithium batteries. Lithium-ion polymer battery technology has been mature and commercialized in the world for more than two years. Although sales have risen rapidly, its market share is still less than 10%, compared with the 90% market share of liquid lithium batteries. Far below people's expectations. Due to various reasons, the price of polymer in the current market is higher than that of liquid lithium battery. Performance, large-format batteries), polymer batteries are being known by more and more mobile phones, mobile DVDs, and planners. Therefore, polymer manufacturers are still confident that polymers will come. The opening trend of polymer lithium batteries can be seen from the opening of mobile phones. Nowadays, mobile phones have the following open trends: (1) The mobile phone itself is opened in the direction of miniaturization and ultra-thinness, which is convenient for consumers to carry; (2) The personalization of mobile phone planning is reflected in the planning concept is no longer the original square, irregular shape , Curves, and curved surfaces have become the mainstream of mobile phone planning aesthetics; (3) With the use of color screens, mobile phone functions have been added. Smaller and thinner batteries are one of the most useful ways to miniaturize mobile phones. Batteries less than 4mm thick are often the mainstream of thin mobile phone devices, which is the advantage of polymer in terms of cost performance. Mobile phones with irregular shapes, curves and curved surfaces leave an irregular useful space for the battery. The rectangular form of the liquid has no useful use space and has a low capacity, while the laminated polymer can maximize the use of this irregular space and increase the capacity. At present, TCL Jinneng’s arc batteries, trapezoidal batteries, and backpack batteries can increase the capacity of mobile phones by more than 50% compared with liquid batteries of corresponding specifications. Therefore, mobile phones use more and more energy. The battery capacity should be increased accordingly. Polymer batteries have significant advantages without increasing the thickness of the battery. Similarly, laptop computers, Bluetooth headsets, PHS mobile phones, mobile DVDs and other electrical appliances are all open towards mobility and portability. With the advent of LCD screens, their functions are constantly being added, and LCD screens are also becoming more mobile and portable. It keeps rising. These have provided unlimited business opportunities for polymer lithium batteries. 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: Analyze the design of a low-power lithium battery management system