Comparative analysis of polymer battery and lithium ion battery

1. The fundamental difference is the raw material, which is the total source of the different performance of the two. Polymer battery refers to the use of polymer materials in at least one of the three major components: positive electrode, negative electrode or electrolyte. Macromolecule means high molecular weight, and the corresponding concept is small molecule. Macromolecule has high strength, high toughness and high elasticity. The polymer materials currently developed for polymer batteries are mainly used for positive electrodes and electrolytes. ①In addition to the inorganic compounds of lithium-ion batteries, the cathode materials of polymer batteries can also use conductive high-molecular polymers; ②The electrolytes of polymer batteries include polymer electrolytes (solid or colloidal) and organic electrolytes, which are used in lithium-ion batteries. Electrolyte (liquid or gel) 2. Different plastic shape polymer batteries can be thinned, arbitrarily shaped and arbitrarily shaped, because the electrolyte can be solid or colloidal rather than liquid, while lithium-ion batteries use electrolyte , A sturdy casing is required as a secondary package to contain the electrolyte. Therefore, this also makes the lithium-ion battery add a part of the weight. 3. In terms of safety, most of the current polymers are soft-packed batteries, using aluminum plastic film as the outer shell. When organic electrolytes are used inside, they will not explode even if the liquid is hot, because the aluminum plastic film polymer battery uses solid or colloidal No leakage, but spontaneous rupture. But nothing is absolute. If the instantaneous current is large enough and a short circuit occurs, it is not impossible for the battery to spontaneously ignite or burst. The safety accidents of mobile phones and tablet computers are mostly caused by this situation. 4. Battery cell voltage Since polymer batteries use polymer materials, they can be made into a multi-layer combination to achieve high voltage, while the nominal capacity of lithium ion battery cells is 3.6V. If you want to achieve high voltage in actual use , You need to connect multiple cells in series to form an ideal high-voltage working platform. If you compare polymer batteries and lithium-ion batteries with the above characteristics, the conclusion is certain. However, the application of lithium-ion batteries still dominates the market. This shows that lithium-ion batteries also have relative advantages. We will continue to compare Go down. 5. The solid electrolyte ion conductivity of conductive polymer batteries is low. At present, it is important to add some additives to make it a gel electrolyte to improve the conductivity. This is just a new addition of ionic conductivity, unlike the conductivity of lithium-ion batteries to maintain a stable value, and will not be affected by the quality of auxiliary materials. 6. The capacity of the polymer battery has not been effectively improved, and it has been reduced compared with the standard capacity lithium-ion battery. 7. Manufacturing process The thinner the polymer battery is, the better it is to process, and the thicker the lithium-ion battery is, the better it is to process. This makes the application of lithium-ion batteries more expandable. 8. Price This is a key factor that determines the market capacity of the two. At present, the price of polymer batteries on the market is generally higher than that of lithium-ion batteries, which affects the market capacity of the two. The ratio of the former to the latter is 1:9. Disclaimer: Some pictures and contents of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the hazards of processing lithium-ion batteries?