Understanding How Batteries Work (IMAGE) University of Delaware Caption Koffi Pierre Yao, assistant professor of mechanical engineering at the University of Delaware, uncovers novel insights about lithium ion batteries. Credit Photo by Kathy F. Atkinson Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.