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

What is the difference between liquid lithium battery and polymer lithium battery? 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. 1. Differences in 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 with polyacrylic acid, polymethacrylic acid and other weird things. 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 specific components). Polymer lithium battery Liquid lithium battery Energy density (Wh/L)>300200~280 Customizable degree (shape) Flexible and difficult, Lightweight (no need for metal protective shell), heavier (metal protective shell is required), safer, safer than safer, more expensive and cheaper 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. 3. Weight: It has been indicated on the form. 4. Safety: Under extreme conditions (for example, overcharge/high temperature), a violent chemical reaction will occur inside the lithium battery, and a large amount of gas will appear. At this time, the liquid lithium battery is wrapped by a metal shell, and the shell will be affected when the internal pressure is quite large. A rupture explosion occurs, and because the polymer lithium battery is only wrapped with packaging aluminum film (or plastic shell), as long as the internal pressure is slightly higher, it will expand or rupture, and will not cause an explosion. But it should be noted that both liquid lithium batteries and polymer lithium batteries can burn under extreme conditions. 5. Cost: In addition to the higher material cost of polymer lithium batteries than liquid lithium batteries, because polymer lithium batteries can be customized to a higher degree, there will be more costs in the design and manufacturing process, such as various customized Tooling fixtures, test equipment, etc., cause the cost of polymer lithium batteries to be higher than that of liquid lithium batteries with standard/regular 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: What types of lithium-air batteries are there?