Nanoengineers at the University of California San Diego have developed an energy-efficient process to recycle and regenerate cathodes from spent lithium ion batteries, making them work just as good as new. The process involves harvesting the degraded cathode particles from a used battery and then boiling and heat treating them. Researchers built new batteries using the regenerated cathodes. Charge storage capacity, charging time and battery lifetime were all restored to their original levels.
Press release: jacobsschool.ucsd.edu/news/news_releases/release.sfe?id=2454
Photos by David Baillot/UC San Diego Jacobs School of Engineering