Sang-Young Lee is a Hwalchun distinguished professor of Department of Chemical and Biomolecular Engineering at Yonsei University, Korea. He received BA in Chemical Engineering from Seoul National University in 1991, MS, and PhD in Chemical Engineering from KAIST in 1993 and 1997. He served as a postdoctoral fellow at Max-Planck Institute for Polymer Research from 2001 to 2002. Before joining UNIST, he worked at Batteries R&D, LG Chem as a principal research scientist who led the development of ceramic-coated separators (SRS®). He is a fellow of both the Korean Academy of Science and Technology and the National Academy of Engineering of Korea. He is the director of Yonsei Battery Research Centre and serves as the editor of Journal of Power Sources (Elsevier). His research interests include the high-mass-loading electrodes, organic material-based solid-state batteries, cellulose-based paper batteries, and flexible/wearable power sources.