Our daily application of the most digital devices than cell phones, almost everyone has, with the advancement of lithium battery technology, cell phones, such portable electronic devices also continue to need more capacity to maintain high performance use. Then in the volume of the premise of the same, enhance the unit energy density of lithium batteries is increasingly important, the energy density of lithium batteries in the future is going to continue to improve, which not only affects this people's communication, in other electric devices such as electric vehicles, smaller size and higher energy density requirements will be increasingly high.
Northwestern University research team developed a new lithium battery material, the use of this material can be manufactured more stable performance of higher-capacity lithium-ion batteries, as a way to significantly improve the smartphone, or electric vehicles and other electronic devices such as the endurance time, relative to the current situation, the maximum can even be extended to more than twice.
Lithium-ion batteries are the most widely used and representative of modern high-performance batteries, which rely mainly on lithium ions moving between the positive and negative electrodes to discharge to work. Today, both consumer electronics, or power battery applications, are increasingly high energy density requirements, we are constantly exploring, and constantly improve the performance of the product at the same time, but also hope to obtain a more durable power range, usually, people use a compound of lithium, oxygen and a transition metal for the battery cathode, which is responsible for the storage and release of electrical energy, so its nature is also The key to battery capacity.
At this stage, the most commonly used transition metal is cobalt, research has found that magnesium can be used to replace cobalt, which can improve capacity while reducing costs, but magnesium also has obvious defects, battery performance degradation is too fast, two rounds of charge and discharge after a significant decline.
However, the new material developed is a lithium-magnesium oxide doped with chromium and vanadium, which is used as the cathode of lithium-ion batteries, the battery capacity has increased significantly, while the performance is stable, and does not degrade quickly.
In addition, the researchers tried the scheme of doping different elements into lithium-magnesium oxide to calculate the respective energy storage levels of different mixtures. After long and repeated trials, they eventually found that blending chromium and vanadium provided the most stable performance while maintaining the battery's high capacity.
The team then first developed a structural model for the Li-MgO material. The model was detailed down to the individual atoms, from which the team obtained a lot of data to analyze the entire charge and discharge process, and found that the oxygen is also involved in the storage of electricity, and thus the capacity is larger than before.
The researchers say the next step is to test the new material's performance in the lab for practical applications. Continued stable performance on the current capacity of lithium batteries will get a major breakthrough.
Welcome to visit our company website: www.manlybattery.com. If you have any interests in batteries, please feel free to contact us: info@manlybattery.com
