What are the differences between polymer lithium batteries and liquid lithium batteries?

The first thing to note is that the working principles of the two are the same. Both charge and discharge are realized through the process of lithium ion insertion and extraction. The insertion of lithium ions into the negative electrode is charging, and the extraction of lithium ions from the negative electrode is discharge. Lithium battery packs contain three basic elements: positive electrode, negative electrode, and electrolyte (material filled between the two levels). Of course, there is also a separator in which the positive and negative electrodes are in direct contact (of course, lithium ions can pass smoothly, but the separator does not It will explode if a short circuit occurs~~) 1. Different materials: In polymer lithium batteries, at least one of the three basic elements mentioned above must be made of polymer materials, for example, the electrolyte solution is replaced by polyacrylic acid and polymethyl. Acrylic and other materials. 2. The difference in electrolyte morphology: liquid lithium batteries mostly use liquid organic solvents + conductive salts, while polymer lithium batteries replace these electrolytes with gels/solids (see battery model for details). What are the advantages of these two kinds of lithium batteries? 1. Energy density: the greater the energy density, the more capacity a unit volume can have. The energy density of the polymer lithium battery has now reached 600Wh/L+ through the improvement of materials/thickness of the negative electrode (anode) and separator. 2. Degree of customization: The polymer lithium battery is easier to be thinner in shape, and there is no need to use a metal protective shell to wrap it, so it is easier to customize into various shapes. 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: How to test the 18650 lithium battery pack