题目：Modeling, Simulation, and In-situ Characterization of Electrode Materials for Solid Oxide Fuel Cells
报告人：Prof. Meilin Liu, School of Materials Science and Engineering, Georgia Institute of Technology
时间：6月2日上午9:00
地点：曹光彪大楼326室
报告内容简介：
Solid oxide fuel cells (SOFCs) represent the cleanest, most efficient and versatile chemical-to-electrical energy conversion system. One of the grand challenges facing the development of a new generation of SOFCs is the creation of novel electrode materials with functionally graded microstructures that not only promote fast transport of ionic/electronic defects but also facilitate rapid surface electrochemical reactions. It is well know that the performances of fuel cells as well as other processes relevant to electrochemical energy storage/conversion are often determined by interfacial losses. This presentation will highlight some recent progress in modeling, simulation, and in-situ characterization of porous electrodes in SOFCs, including quantum chemical modeling of the interactions between O2 and cathode materials as well as those between anodes and fuel molecules with contaminants (e.g., sulfur), continuum modeling of charge and mass transport along surfaces, across interfaces, and through porous electrodes, as well as characterization of surface species, interfacial processes, and new phases using in situ Raman spectroscopy. Probing and mapping surface molecular processes relevant to electrode kinetics under practical fuel cell operating conditions may provide vital insights into the mechanisms of interfacial reactions, which are critical to achieving rational design of better electrodes, catalysts, and interfaces. Successful creation of new materials with flexibility in composition and microstructure, and hence in electrical, transport, and catalytic properties, is essential to achieving a clean and secure energy future.
报告人简介：
Prof. Liu attended University of California at Berkeley for graduate study. After the doctoral study, he joined Ceramatec as a research scientist and work for 4 years in Salt Lake City. From 1992, he started work in Georgia Institute of Technology, and now Prof. Liu is a Co-Director in Center for Innovative Fuel Cell and Battery Technologies. Prof. Liu's primary interests lie in fundamental understanding of the effect of structure, defects, and microstructure on transport and electrical properties of surfaces and interfaces. In particular, his group is interested in developing novel materials for energy storage and conversion, for chemical sensing, and for hydrogen production and separation. In addition, his group is interested in microscopic modeling of mass and charge transport in solid electrochemical systems and polarization at interfaces. His main works have been published in Nature, Adv. Mater., J. Power Source, Electrochem. Commun., J. Electrochem. Soc., et al
