Sang Hyun Ahn received his Ph.D. degree from School of Chemical and Biological Engineering of Seoul National University in 2012. After that, he joined Thomas Moffat’s group as a postdoctoral researcher at National Institute of Standard and Technology, USA. Currently, he is a professor at School of Chemical Engineering and Material Science at Chung-Ang University. His research focuses on electrochemical materials and devices for energy conversion and storage, including water, carbon dioxide, and ammonia electrolysis.