What is the difference between polymer lithium ion battery and lithium battery

Most people think that lithium battery is a big category, which includes battery products related to lithium ion, but it is not. In a broad sense, lithium battery includes lithium primary battery and lithium ion battery; due to the ratio of lithium ion battery expression Lithium batteries are more extensive, so lithium batteries generally refer to lithium-ion batteries; however, lithium-ion batteries are divided into polymer lithium-ion batteries and liquid lithium-ion batteries; since liquid lithium-ion batteries are widely used, lithium batteries are usually Refers to the liquid lithium ion battery, so people are habitually distinguishing the polymer lithium ion battery separately; so in general, the narrow level is usually the comparison of polymer lithium ion battery and liquid lithium ion battery; in the following In the description, lithium batteries represent liquid lithium-ion batteries. 1. What is the difference between polymer lithium ion battery and lithium 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 of the positive electrode, negative electrode or electrolyte. Macromolecules mean large molecular weights, and the corresponding concept is small molecules. Macromolecules have 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 compound of the lithium battery, the positive electrode material of the polymer battery can also use the conductive polymer; ②The electrolyte of the polymer battery includes the polymer electrolyte (solid or colloidal) and organic electrolyte, and the lithium battery uses the electrolyte. (Liquid or colloid) 　　 2. In terms of shaping, polymer batteries can be thinned, arbitrarily shaped, and arbitrarily shaped. The reason is that the electrolyte can be solid or colloidal instead of liquid, while lithium batteries use electrolyte. A sturdy enclosure is needed as a secondary package to contain the electrolyte. Therefore, this also makes the lithium battery add a part of the weight. 3. In terms of safety: most of the current polymers are soft-pack 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 aluminum plastic film polymer batteries use solid or colloidal state. There is no leakage, but it ruptures naturally. 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. Cell voltage: Because polymer batteries use polymer materials, they can be made into multiple layers in the cells to achieve high voltage, while the nominal capacity of lithium 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. 2) What is the difference between polymer batteries and lithium batteries. If you compare polymer batteries and lithium batteries with the above characteristics, the conclusion is certain. However, the application of lithium batteries still dominates the market, which shows that lithium Batteries also have comparative advantages, and we will continue to compare them.　　5. Conductivity: The solid electrolyte of polymer batteries has low ionic conductivity. At present, some additives are mainly added to make it a gel electrolyte to improve the conductivity. This also only increases the ionic conductivity, unlike the conductivity of the lithium battery to maintain a stable value, and will not be affected by the quality of the auxiliary materials.　　6. u200bu200bCapacity: The capacity of polymer batteries has not been effectively improved, and it has been reduced compared with standard capacity lithium batteries.　　7. Manufacturing process: The thinner the polymer battery, the better the production, the thicker the lithium battery, the better the production, which makes the application of lithium batteries more expandable.　　 8. Price: This is the 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 batteries, which affects the market capacity of the two. The ratio of the former to the latter is 1:9. 3) Conclusion In the end it is difficult to say which polymer lithium battery or lithium battery is better. They all have their own merits. If we must distinguish between polymer batteries, there will be more small applications for polymer batteries, and lithium batteries are more targeted at large applications. Lithium batteries Among them, 18650 lithium batteries are more representative. We can learn about the parameters of 18650 lithium batteries so that we can have a deeper understanding of lithium batteries and polymer batteries. If polymer lithium batteries and lithium batteries break through the limitations of price and design, it is bound to Better and more comprehensive development in the future; Statement: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete the previous article: (EIS) lithium battery impedance technology detailed introduction