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|Friday, September 19, 2014 @ 12:00 pm EDT — Friday, September 19, 2014 @ 1:00 pm EDT|
Ionic conduction in low-dimensional oxides and solid state fuel cells
Bio: Shriram Ramanathan received his PhD from Stanford University in Materials Science and Engineering in 2002. He was a research staff member at Components Research, Intel for over three years and subsequently joined Harvard University where he is presently Associate Professor in the School of Engineering and Applied Sciences. His research interests are in materials science and engineering of thin film oxides.
Abstract: Studies on structure-property relations in frontier materials enable scholarship in materials science as well as collaborative pursuits to explore societal relevant technologies. In this context, we will discuss our on-going studies with emphasis on high temperature ionic and electronic conduction in ultra-thin freestanding oxide membranes. We will present examples of high performance solid oxide fuel cells operating in natural gas utilizing such scalable suspended membranes that are of relevance to distributed energy. Techniques to probe ionic transference, relaxation dynamics of interface-controlled oxides to directly measure kinetics of oxygen exchange and inform design of electrodes will be discussed. We will present in brief examples of unique results enabled through cross-disciplinary collaborations spanning environmental chemistry, computational science, robotics and device engineering utilizing such materials. We will consider emerging opportunities in the area of freestanding oxide membranes that creates pathways for fundamental studies in confined heterostructures and synthesis of new metastable oxide phases. Time permitting, we will discuss the broader implications of ionic transport in the context of emergence of new electronic phases in narrow gap semiconductors.
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