Analysis of the types of lithium batteries

According to the different electrolyte materials used in lithium batteries, lithium batteries can be divided into two categories: liquid lithium batteries (lithiumion battery, referred to as LIB) and polymer lithium batteries (polymer lithiumion battery, referred to as LIP). The positive and negative materials used in liquid lithium batteries and polymer lithium batteries are the same as liquid lithium ions, and the working principles of the batteries are basically the same. Generally, LiCoO2 is used for the positive electrode, various carbon materials such as graphite are used for the negative electrode, and aluminum and copper are used as current collectors. Their important difference lies in the difference in electrolytes.Lithium batteries use liquid electrolytes, while polymer lithium batteries are replaced by polymer electrolytes. This polymer can be dry or colloidal. At present, most Using polymer gel electrolyte. (See the table below) Electrolyte case/packaging diaphragm current collector Liquid lithium battery Liquid stainless steel, aluminum 25μPE copper foil and aluminum foil polymer lithium battery colloidal polymer aluminum/PP composite film without diaphragm or a μPE copper foil and aluminum foil due to polymer lithium The battery uses a gel electrolyte that will not leak like liquid electro-hydraulic, so it is easy to assemble, making the overall battery very light and thin. There will be no safety problems such as leakage, combustion and explosion, so the battery casing can be made of aluminum-plastic composite film, which can increase the specific capacity of the entire battery; polymer lithium batteries can also use polymer as the positive electrode material, and its quality The specific energy will be more than 50% higher than the current liquid lithium battery. In addition, polymer lithium batteries are better than liquid lithium batteries in terms of operating voltage and charge-discharge cycle life. Based on the above advantages, polymer lithium batteries are known as the next generation of 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: How to recover the imbalance of the lithium battery pack?