报告题目：Recent Development of High Performance Nanomaterial Rechargeable Lithium-ion Battery Applications

报告人:  Dr. Alan Wei 

　ZincAir Power Corporation, USA；国家舟山新区千人计划

时间：2015年3月26日（星期四）上午10:00-12:00  

地点：中国科学院力学研究所主楼344会议室 

报告摘要： 

   Although lithium ion batteries have been evolving remarkably in decades, the energy density and cycle life still need to be improved to meet the DOE target for EV applications in competition with combustion engine.  In addition, global warming and environmental pollution propelled the efforts of searching better electrode materials forward.  Silicon as its superb electrochemical property for a promising anode material for high energy batteries, has been extensively explored.  However the volume change in cycling process as the lithiation and delithiation proceed, leads to electrode active material pulverization and delamination, and accumulates undesired solid-electrolyte interphase (SEI) on silicon electrode surface, hindered its electrode performance.

To overcome the aforementioned challenge to achieving DOE target, several noticeable novel designs have been experimented and their exciting results been reported:  (1) A unique double-walled nanotube anode structure confining volume expanding only inward during lithiation, has been reported to have surpassed the DOE target;  (2) A thin silicon film deposited on multilayer graphene on a nickel foam substrate, has displayed a higher stability;  (3) A three-dimensional hierarchical sandwich-type graphene sheet-sulfur/carbon composite cathode structure, has reported to have much better battery performance as the result of graphene inter-connected conducting network. 

报告人简介： 

   Dr. Alan Wei obtained his BS from Fudan University in 1982, MS from Nanjing University in 1987, again from Illinois State University in 1990, and his PhD from Ohio State University in 1996 (Co-Advisor is Prof. Alan MacDiarmid , Awarded2000Nobel Prize in Chemistry). Then he has been working at ZincAir Power Corporation, USA.His fields of specialization spanned in variety of multidisciplinary areas such as in applied electrochemistry, organic chemistry, quantum dynamics modeling and simulation, chemical and solid state physics with special emphasis on thedevelopment and characterization of novel materials for rechargeablelithium ion batteries, conducting polymers, inorganic magnetic materials, and biomedical materials.

报告联系人：沈楠  (office@lnm.imech.ac.cn 82543935)