Sodium ion batteries are commercially available like lithium batteries, which will greatly reduce battery input costs

Today, people rely heavily on lithium-ion batteries. Driven by electric vehicles and battery energy storage systems, there is an increasing demand for lithium batteries and lithium mines. However, lithium raw materials will eventually be exhausted. Will there be an energy disaster? Therefore, Purdue University in the United States has set its sights on sodium-ion batteries, which have more abundant raw materials and cheaper materials. Recently, they have successfully solved the problem of 'losing' charge and discharge ions in sodium-ion batteries, and further improved the stability and capacity of battery charge and discharge. In terms of crust content and cost, sodium is slightly better than lithium ore. Among them, the content of sodium skin is as high as 2.6%, ranking 6th, while lithium is only 27th. If the cost is included, the difference between lithium and sodium is 100 times, and lithium is about 15,000 US dollars. US dollars per metric ton, sodium is 150 US dollars. Obviously, sodium has won a greater victory in batteries, but why hasn't sodium-ion batteries been commercialized so far? Now, scientists can control the combustion reaction of sodium in water, but on the road to commercialization, sodium ion batteries still need to solve a major obstacle, because sodium ions are easily lost during battery charging and charging. Sodium ion batteries operate in the same way as lithium ion batteries. They mainly rely on the movement of sodium ions between the cathode and anode. However, sodium ions tend to adhere to the anode during charging and discharging, and do not move to the cathode. This situation is also called solid electrolyte interphase (SEI). The ions form a thin film of one thousandth of a millimeter on the graphite electrode, which can protect the carbon particles from harmful reactions with acidic electrolytes. At the same time, it allows ions to shuttle between the electrode and the electrolyte. Vilas Pol, associate professor of chemical engineering at Purdue University, said that the occurrence of SEI is not a bad thing, but that the SEI film is too thick and consumes the sodium ions needed for charging. Therefore, Purdue University has proposed a solution. If sodium is made into powder, it can provide SEI with the sodium required to protect the carbon particles without consuming the sodium ions required for charging and discharging. In order to reduce the contact between sodium and moisture, the research team conducted an experiment in a glove box containing the inert gas argon, and used ultrasound to melt a large amount of sodium into a liquid similar to grape milk, and finally the liquid Cool and suspend it in the hexane solution so that the sodium particles can be evenly distributed in the solution. The experimental results are also in line with scientists' expectations. After adding a few drops of sodium suspension to the anode or cathode, the charge-discharge stability and battery capacity of the sodium-ion battery are effectively improved. Ball said that only a few changes to the electrode treatment process can improve battery performance, which is another way to help sodium-ion batteries move toward commercialization. Although the volume of sodium ion is about twice that of lithium ion, its weight or energy density may not be comparable to that of lithium ion batteries, but the cost of this technology is lower and it is expected to greatly reduce the volume of lithium ion batteries. The cost of grid-level battery energy storage systems. All research institutions are looking forward to the development of sodium ion batteries. At present, Purdue University has submitted a provisional application for the new technology. Disclaimer: The articles published on this site are all from the Internet and do not represent the views of this site. If there is any infringement, please contact to delete WeChat: Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact delete A: The evolution of the ultimate king of lithium-sulfur batteries, the performance far exceeds that of lithium batteries.