Key Materials for High Performances and Safe Lithium Sulfur Batteries
Department of Chemical Engineering, Shanghai Jiao Tong University
Abstract: Due to its high theoretical energy density and abundant natural resources, lithium sulfur (Li/S) battery has been hot topic in the field of electrochemical power sources. However, the cycling and safe property are the critical challenges which prevent the practical applications of Li/S batteries. The main problems are the intrinsic insulator of sulfur cathode, dendrite and serious interface reactions for Li anode, and flammability of organic electrolytes.
S@Conductive-Polymer (S@pPAN) was formed by heating treating sulfur and polyacrylonitrile, which dramatically enhanced the conductivity of sulfur cathode. The active material utilization approaches to 100% and cycling performances are extremely stable. Polymer electrolyte combining with functional additives effectively suppresses lithium dendrite and alleviates interfacial reactions. Nonflammable electrolytes enhance the safe property of organic solvents. Based on aforementioned strategies, we expected to gain high energy, long cycling and safe lithium sulfur batteries.
Biography: Prof. Jiulin Wang received his bachelor and master degrees from Harbin Institute of Technology in 1999, and Ph.D degree from Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences in 2002; he worked at Tsinghua University and Queen's University (Canada) as a postdoctoral researcher from 2002 to 2004; he joined Shanghai Jiao Tong University since 2005, temporarily went to Chemnitz University of Technology (Germany) as an Alexander von Humboldt fellow in 2006, and Pacific Northwest National Laboratory of USA as a visiting scholar in 2013. His main research focuses on nanomaterials for high energy density batteries, especially on key materials for Li–S batteries.