Dwight Seferos, University of Toronto (IMAGE) University of Toronto Caption University of Toronto chemist Dwight Seferos and colleagues created a lithium-ion battery that stores energy in a biologically-derived unit, using flavin from Vitamin B2 as the cathode. Credit Diana Tyszko/University of Toronto 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.