![]() ![]() While lithium-ion batteries have been extensively studied, little is known about the degradation mechanisms in sodium-ion batteries. Unfortunately, sodium-ion batteries, like their lithium counterparts, undergo changes during charge and discharge cycles that degrade their performance. Sodium has recently emerged as a prime candidate because it is less expensive, more abundant, and has similar chemical properties. But lithium is expensive and limited in supply, so scientists have been looking for alternatives. Most portable electronics today are powered by rechargeable lithium-ion batteries. The team's findings, published online in Advanced Energy Materials on March 3, could inform the design of future batteries capable of storing the amount of energy and surviving the many cycles required for large-scale energy applications, such as electric vehicles. By identifying the underlying mechanism limiting its performance, we seek to improve its real energy density." "The electrochemical reactions involved cause irreversible changes in the microstructure and chemical composition of iron sulfide, which has a high theoretical energy density. "We discovered that the loss in battery capacity is largely the result of sodium ions entering and leaving iron sulfide - the battery electrode material we studied - during the first charge/discharge cycle," explained Brookhaven physicist Jun Wang, who led the research. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |