Materials Science & Nanoengineering

Materials Science & Nanoengineering

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Department of Materials Science and NanoEngineering (MSNE)

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MSNE Seminar Series Prof. William Chueh "Defect Chemistry of Oxides at the Mesoscale" (450/451/500)


Materials Science & NanoEngineering

By: William C Chueh
Assistant Professor of Materials Science & Engineering
From: Stanford University
When: Thursday, March 30, 2017
3:00 PM - 4:00 PM
Where: Dell Butcher Hall
Abstract: Ion-insertion and redistribution processes in solids, such as that involving lithium and oxygen ions, underpin energy and information transformation devices such as batteries, fuel cells, and resistive switching memories. The relevant length scales span point defects/molecules (atomic scale), extended defects such as dislocations, interfaces, particles, and ensembles of particles (mesoscale and macroscale). Hetereogenities in ion concentration develop at the meso- and macro-scale as a result of chemo-mechanical coupling, phase transition, and variation in interfacial/surface kinetics. Such heterogeneities are directly connected to device functionality, performance and reliability, both positively and negatively. My group has been investigating several prototypical mixed ionic and electronic conductors such as Li_XFePO4 and CeO_2-x using in-situ electron X-ray spectro-microscopy. In this talk, I will discuss our recent progress in understanding and controlling defect formation and transport spanning atomic, meso and macro-scales.
William C Chueh
Will Chueh is an Assistant Professor of Materials Science & Engineering and a Fellow of the Precourt Institute for Energy at Stanford University. He received his BS in Applied Physics, MS and PhD in Materials Science (2010) from California Institute of Technology. Presently, he leads a group of twenty graduate and postdoctoral researchers investigating ion-insertion processes in solids, both fundamentally and as they apply to technologies such as batteries and fuel cells. Prof. Chueh has been recognized with numerous awards such as the Solid State Ionics Young Scientist Award (2013), the Sloan Fellowship in Chemistry (2015), and the Science Award Electrochemistry from BASF and Volkswagen (2016). He was also recognized by MIT's Technology Review as one of the "top 35 innovators under the age of 35" in 2012.