Analysis of the development of ultra-thin lithium batteries

Is it true that lithium batteries that are as thin as paper? Since their invention, lithium batteries have been widely used in 3C electronic products. With the development of smart wearable electronic devices, the demand for ultra-thin lithium batteries continues to increase. At present, ultra-thin batteries are thinner than paper and can be bent and folded for use. Let's take a look at the development of ultra-thin batteries. 1. Ultra-thin lithium batteries The thickness of lithium batteries is usually measured in millimeters, because the material properties of lithium batteries are different. With the improvement of lithium battery processing technology, ultra-thin lithium batteries can be made under 1mm. Now, after years of research and development, processing technology continues to improve processing innovations, the processing of lithium batteries can reach 0.4mm, the thinnest. The shape and size can be customized, and the ultra-thin lithium battery can also have a certain curvature. In terms of energy density, under the same competing product, the same shape and size, it has a higher capacity and discharge capacity, and has a longer battery life. Of course, high-flow requirements can also be achieved. Ultra-thin lithium battery 2. New type of flexible foldable thin battery According to media reports, in recent years, with the development of battery technology, a battery that can be bent and deformed when folded has been invented. What's the specific situation? Let's take a look. A new type of flexible thin battery (1) Korean researchers have produced a battery as thin as paper, which brings hope for wearable devices to break through the battery bottleneck. It is also called a paper battery because of its flexibility. According to analysis, the processing material of the paper battery is mainly derived from wood. First, cellulose is extracted from the wood, and then the cellulose is divided into 10,000 hair-sized pieces, which are used as raw materials to make the poles and separators of the lithium electronic battery. Due to the material, the battery is like a piece of paper, very soft, even if it is folded by a paper crane, it can still work normally, which allows it to be installed in more complicated internal spaces of equipment. Knowing from the above, the advantages of batteries are obvious, and they are a good choice for smart devices. At the same time, the invention of paper batteries means that future smart devices will have ultra-thin fuselages and super battery life. (2) From the Swiss Federal Institute of Technology (ETH Zurich) research group in Zurich, the internal structure of all lithium batteries can be bent, and distortion has replaced new materials, and the world's first arbitrarily bendable and stretchable Lithium battery is a foldable solid-state lithium battery with the same sandwich structure. The so-called solid lithium battery, I mean that the electrolyte used to transfer lithium ions in the battery is not a solution of the above-mentioned organic solvent and lithium salt, but a solid, a special substance between liquid and solid. glue. Hydrogel is a hydrophilic three-dimensional polymer network structure gel. On the one hand, it has rubber-like properties with a large number of cross-linked organic polymer chains, usually connected by covalent bonds, hydrogen bonds or electrostatic forces. The hydrogel chosen by Chen and his team is cross-linked by the strongest covalent bonds, so when each polymer chain is stretched, there is no relative sliding between them due to the strong covalent bonds. When the tension disappears, the polymer chain shrinks and the object returns to its original shape. If there is no such covalent bond, the sliding between the chains during the stretching process will eventually cause the material to break and cannot be recovered. On the other hand, the hydrophilic nature allows the hydrogel to carry large amounts of water. The researchers used the appropriate ratio of highly water-soluble lithium to dissolve the hydrogel. Of course, battery technology still has a long way to go before large-scale commercial applications. 1. The performance of this battery technology cannot be compared with mature commercial batteries, and the energy density must be significantly improved; 2. The battery technology must continuously optimize charge and discharge control, improve the packaging process, and extend its cycle life; this battery technology will reduce The cost of the battery. As the world's first bendable full battery, some of its materials are costly, making it difficult to compete commercially with mainstream batteries. 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: Ni-MH battery design methods and design steps