Lecture: Non-flammable Electrolytes for Li-ion Batteries
Lecture：Non-flammable Electrolytes for Li-ion Batteries
Lecturer：Prof. WANG Chunsheng, University of Maryland
Time：9:30am, August 26, 2019, Monday
Location: 111 Meeting Room, Energy Building
The organic electrolyte Li-ion batteries still surfer from safety concern especially when the energy density of the batteries is approaching the limits. Development of safe electrolytes is urgent needed. In recent five years, we focus on three non-flammable electrolytes; water-in-salt (WIS) aqueous electrolytes, all-fluorinated electrolytes, and solid state electrolytes. WIS electrolytes are intrinsic safe but have narrowed electrochemical stability window limiting the energy density of aqueous electrolyte batteries. By adding high concentrated salts in water, we successfully expend the electrochemical stability window to 3.0V. To further enhance the energy density, we also developed transition metal-free LiBr-LiCl-graphite cathodes that provides 240 mAh/g at 4.2V representing one of highest energy cathodes in Li-ion batteries. In addition, the Li dendrite formation in all- fluorinated electrolytes and solid state electrolytes also investigated.
Dr. WANG Chunsheng is a Robert Franklin and Frances Riggs Wright Distinguished Chair Professor in the Chemical & Biomolecular Engineering, Department of Chemistry and Biochemistry at the University of Maryland. He is an associate editor of ACS Applied Energy Materials, and UMD Director of the UMD-ARL Center for Research in Extreme Battery. His research focuses on reachable batteries and fuel cells. He has published more than 230 papers in peer-reviewed journals including Science, Nature, Nature Materials, Nature Nanotechnology, Nature Communications. His work has been cited form more than 20000 times with H-index of 73. 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