讲座题目：Understanding Surfaces and Interfaces in Energy Storage and Conversion Systems

报告人：Professor Meilin Liu

时 间：7月8日（周五）下午 2:00 – 4:30
地 点：2138cn太阳集团古天乐化学楼A 813
主持人：夏定国（教授）

报告内容摘要：
     The rates of many chemical and energy transformation processes are limited by the charge and mass transfer along surfaces and across interfaces.  Fundamental understanding of rate-limiting steps is vital to achieving rational design of new electrode materials with dramatically enhanced functionality. This presentation will highlight an integrated approach involving multi-scale modeling and in situ characterization to unravel the mechanisms of surface processes and to optimize electrode performance through surface modifications.[1-3] We have demonstrated the utility of Raman spectroscopy for probing and mapping new phases and reaction intermediates on electrode surfaces under operating conditions. We have also characterized the local structure, composition, and morphology of electrode surfaces and interfaces using synchrotron-based techniques and microscopy. These studies have helped us to develop a nanostructured, mixed-valent metal oxide electrode with the highest specific capacitance while maintaining excellent power density and long cycling life. The enhanced performance is attributed to the unique mixed-valent metal oxides of porous nano-architectures, which may facilitate rapid mass transport while promoting facile redox reactions associated with intercalation or adsorption of ions on electrode surfaces.  We have also demonstrated that the electrocatalytic activity and durability of widely-used electrodes can be enhanced by the introduction of a catalytic coating.

报告人简介：
     Meilin Liu is a Regents' Professor of Materials Science and Engineering and Co-Director of the Center for Innovative Fuel Cell and Battery Technologies at Georgia Institute of Technology, Atlanta, Georgia, USA. He received his BS from South China University of Technology and his MS & PhD from University of California at Berkeley, all in materials science and engineering. His research interests include defects and transport in solids, electrochemical behavior of thin films and interfaces, solid state ionics, and electroceramics. His current research activities include modeling, simulation, and in situ characterization of charge and mass transport in ionic and electronic conductors; fabrication and evaluation of ceramic membranes, thin films, and coatings; design, fabrication, and testing of nanostructured electrodes and devices for energy storage and conversion. He is a Fellow of the American Ceramic Society (ACerS), a winner of Ross Coffin Purdy Award (ACerS, 2010), NASA Tech Brief Award (2007), invited participant in US-Japan Frontiers of Engineering (NAE, 2007), Crystal Flame Innovation Award in Research (FuelCell South, 2005), Outstanding Achievement in Research Program Development Award (Georgia Tech, 2003), Sustained Research Award (Sigma Xi, 2003), Best Faculty Paper Award (Sigma Xi, 2001), Outstanding Faculty Research Author Award (Georgia Tech, 1999), Invited participant in Frontiers of Engineering (NAE, 1997), Best MS Thesis Advisor Award (Sigma Xi, 1996), and a National Young Investigator Award (NSF, 1993-98).
     1. L. Yang, Y. M. Choi, W. Qin, H. Chen, K. Blinn, M. F. Liu, P. Liu, J. Bai, T. A. Tyson, M. Liu, Nature Comms, 2, 35, 2011.
     2. M. Lynch, L. Yang, W. Qin, J. J. Choi, M. F. Liu, K. Blinn, and M. Liu, Energy Environ. Science, 4, 2249, 2011.
     3. L.Yang, S.Wang, K. Blinn, M. Liu, Z. Liu, Z. Cheng, and M. Liu, Science, 326, 126-129, 2009.