Bingqing Wei, University of Delaware (IMAGE) University of Delaware Caption Bingqing Wei and colleagues are working to build a better lithium-sulfur battery. Credit Kathy F. Atkinson/University of Delaware Usage Restrictions Image must include credit to University of Delaware. 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.