Interphase of Safe Electrolytes for Li-Ion Batteries
Dr. Chunsheng Wang is a Professor in the Department of Chemical & Biomolecular Engineering, Department of Chemistry and Biochemistry at the University of Maryland. He is an associate editor of ACS Applied Energy Materials. He received Ph. D in Materials Science & Engineering from Zhejiang University, China in 1995. Prior to joining University of Maryland in 2007, he was an assistant professor in Department of Chemical Engineering at Tennessee Technological University (TTU) in 2003-2007 and a research scientist in the Center for Electrochemical System and Hydrogen Research at Texas A&M University in 1998-2003. His research focuses on reachable batteries and fuel cells. He has published more than 200 papers in peer-reviewed journals including Science, Nature Materials, Nature Nanotechnology, Nature Chemistry, Nayure Communications. His work has been cited form more than 12700 times with H-index of 61 (ISI). His work on lithium batteries have been featured in NASA Tech Brief, EFRC/DoE newsletter, C&EN etc. Dr. Wang is the recipient of the A. James Clark School of Engineering Junior Faculty Outstanding Research Award in the University of Maryland in 2013, and winner of UMD’s invention of the Year for 2015.
Li-ion batteries are the critical enabling technology for the portable devices, electric vehicles (EV), and renewable energy. However, the safety of current batteries still needs to be improved to satisfy these requirements. In addition, the formation of solid electrolyte interphase (SEI) is critical for high voltage Li-ion batteries. We investigated the role of SEI in the electrochemical stability window and electrochemical performances of nonflammable electrolytes: water-in-salt electrolytes, all fluorinated organic electrolytes, and solid state electrolytes. The criteria of SEI for Li-ion batteries and the critical issues limiting the performance of these safe electrolytes will be discussed.