A research team in the United States has discovered a new material that can double the energy density of mobile phone lithium batteries

Mobile phones are the most commonly used digital devices in our daily lives. Almost everyone has them. With the advancement of lithium battery technology, portable electronic devices such as mobile phones continue to require more capacity to maintain high performance. Under the premise of the same volume, it is more and more important to increase the unit energy density of lithium batteries. The energy density of lithium batteries will continue to increase in the future. This will not only affect people’s communications, but also in electric vehicles and other In power equipment, the requirements for smaller size and higher energy density will become higher and higher. A research team from Northwestern University in the United States has developed a new lithium battery material that can be used to create a larger capacity lithium-ion battery with more stable performance, which can greatly increase the battery life of electronic devices such as smart phones or electric vehicles. , Relative to the current situation, the maximum can even be extended to more than twice. Lithium-ion batteries are the most widely used and are also representative of modern high-performance batteries. They mainly rely on lithium ions to move and discharge between the positive and negative electrodes to work. Nowadays, whether it is consumer electronics or power battery applications, the requirements for energy density are getting higher and higher. We are constantly exploring and continuously improving product performance while also hoping to obtain longer-lasting power life. Generally, People use a compound of lithium, oxygen and a transition metal as the positive electrode of the battery. Among them, it is the transition metal that is responsible for storing and releasing electrical energy, so its properties are also the key to battery capacity. The most commonly used transition metal at this stage is cobalt. Studies have found that magnesium can be used to replace cobalt, which can increase capacity while reducing costs. However, magnesium also has obvious defects. decline. However, the new material developed this time is lithium magnesium oxide doped with chromium and vanadium, which is used as the positive electrode of lithium-ion batteries. The battery capacity has been greatly improved, while the performance is stable and will not quickly degrade. In addition, the researchers tried a scheme of incorporating different elements into lithium magnesium oxide and calculated the respective energy storage levels of different mixtures. After a long period of trial and error, they finally found that the incorporation of chromium and vanadium can achieve the most stable performance while maintaining the large capacity of the battery. Subsequently, the research team first established a structural model for the lithium magnesium oxide material. The model details a single atom and obtained a lot of data from it. The team analyzed the entire charging and discharging process and found that the oxygen in it will also participate in the storage of electrical energy, so the capacity is larger than before. The researchers said that in the next step they will test the actual application performance of the new material in the laboratory. Continuous and stable performance will make a major breakthrough in the current capacity of lithium 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 article: Today we try to walk into Wuxi to learn about Murata's new energy