Japanese scientists have demonstrated that a particular material is capable of acting as an effective component for sodium-ion batteries, so that they can compete with lithium in a number of characteristics, primarily in terms of charging speed..
Lithium-ion batteries have become popular due to a number of advantages and a wide range of applications, however their main disadvantage is the limited availability of lithium. Besides the high cost, its production is limited by technical factors, and the demand is constantly increasing. Therefore, researchers are actively exploring alternatives such as sodium. However, despite its abundance, due to the large size of the ions, they cannot simply replace lithium..
A team from the Nagoya Institute of Technology is working on a solution to this problem. Scientists have studied a database of about 4,300 available crystalline sodium compounds. After careful analysis of each of them, we found that Na2V3O7 meets the stated requirements. The material has the desired electrochemical characteristics, the desired crystal and electronic structure. During the tests, it was found that this composition demonstrates a high charging speed, and is also able to store the accumulated energy for a long time..
Despite all the advantages, during testing, the researchers found that during the final stages of charging, Na2V3O7 undergoes significant wear and tear. As a result, its practical capacity becomes half the theoretical values. Therefore, scientists are currently working to improve the characteristics of the material so that it can remain stable throughout the entire charging process..
However, chemists at the University of Alberta have already found a way increasing the energy intensity of lithium-ion batteries by 10 times. We also previously reported that Toyota and Panasonic will start producing solid-state lithium batteries for cars, and Honda created a working prototype of a fluoride-ion battery.
text: Ilya Bauer, photo: NITech, olino, wikimedia