SEMINAR

　　The State Key Lab of

　　High Performance Ceramics and Superfine Microstructure

　　Shanghai Institute of Ceramics, Chinese Academy of Sciences

　　中 国 科 学 院 上 海 硅 酸 盐 研 究 所 高 性 能 陶 瓷 和 超 微 结 构 国 家 重 点 实 验 室

　　Fundamental Considerations in Rechargeable Batteries

　　Prof. Guozhong Cao

　　Department of Materials Science and Engineering

　　University of Washington

　　时间：2016年7月21日（星期四）下午2: 00

　　地点： 2号楼607会议室（国家重点实验室）

　　欢迎广大科研人员和研究生参与讨论！

　　联系人：陈立东（4804）

　　报告摘要:

　　Lithium ion batteries are playing indispensible role in our modern life full of portable electronics and in constant move. However, the advancement of lithium ion batteries has lagged way behind electronics, in spite of extensive research efforts across research venues and industries. Search for better electrode materials with both high energy and power densities as well as excellent cyclic stability must consider (1) proper chemical reaction at the interface between electrode and electrolyte: alloying, conversion reaction and intercalation, (2) crystal structure with available space to accommodate guest species such as spinel, olivine and layer structured crystals, (3) reversible phase transition, and (4) manageable volume change. In addition, the charge/discharge voltage and transport kinetics play determining roles in the energy density and power density of resulting batteries. In this presentation, I will first present an overview what to be considered for an effective electrodes for lithium ion batteries and then present some of our research results to illustrate how the impacts of defects such as dopants and vacancies, particularly the surface defects, nanostructures, and low crystallinity or amorphous nature of electreodes on the lithium-ion intercalation capacity and voltage, as well as energy efficiency when such materials are used as electrodes in lithium ion batteries. I will also show our most recent work on amorphous cathode for effective sodium ion intercalation with much enhanced storage capacity and high intercalation potential, and discuss possible implications for magnesium ion batteries.

　　报告人简介:

　　Dr. Guozhong Cao is Boeing-Steiner professor of Materials Science and Engineering, professor of Chemical Engineering and adjunct professor of Mechanical Engineering at the University of Washington, Seattle, WA, and also a senior professor at Beijing Institute of Nanoenergy and Nanosystems, Chinese Aacdemy of Sciences, and a professor at Dalian University of Technology, China. He has published over 500 research papers and authored and edited 8 books, and is one of the Thomson Reuters Highly Cited Researchers (citations: >20,000 and h-index: 72). His current research focused on chemical processing of nanomaterials for solar cells, rechargeable batteries, and supercapacitors as well as actuators and sensors.