Japanese scientists have demonstrated that the specific material is capable of acting as an effective component for sodium-ion batteries, so that they can compete with lithium on a number of characteristics, primarily in charge speed.
Lithium-ion batteries have become popular thanks to a variety of advantages and a wide range of applications, but their main disadvantage is the limitations of lithium. In addition to high cost, its production is limited by technical factors, and the demand is constantly increasing. Therefore, researchers actively explore alternatives, such as sodium. However, despite its abundance, due to the large size of the ions, they can not be simply replaced by lithium.
The decision of this problem is a team from the Nagoya Technological Institute. Scientists have studied the base from about 4,300 available compounds with sodium having a crystal structure. After a careful analysis of each of them, they found that Na2V3O7 meets the stated requirements. The material has the desired electrochemical characteristics, the desired crystalline and electronic structure. During the test, it was found that this composition demonstrates the high charge rate, and is also able to store the accumulated energy for a long time.
Despite all the advantages, in the process of testing, the researchers revealed that at the final stages of charging Na2V3O7 is subjected to significant wear. As a result, its practical container becomes twice as much theoretical indicators. Therefore, at the moment, scientists work on improving the characteristics of the material so that it can remain stable throughout the charging process.
However, chemists from the University of Alberta have already found