Abstract
In this talk I will focus on applying in situ transmission electron microscopy (TEM) and lab-on-a-chip to mechanistic investigations of energy nanomaterials. Recent advances in nano-manipulation, environmental TEM and MEMS have allowed us to investigate coupled mechanical and electrochemical phenomena with unprecedented spatial and temporal resolutions [Science 330 (2010) 1515; Nano Letters 11 (2011) 4535; ACS Nano 6 (2012) 9425]. For example, we can now quantitatively characterize liquid-solid [Nature Nano. 8 (2013) 277] and gas-solid interfaces at nanometer resolution for in situ corrosion and fatigue [PNAS 110 (2013) 19725] processes. Direct observations of SnO2, ZnO, Si, Ge, graphene and carbon nanotube battery anodes and LiFePO4 nanowire cathode [Nano Letters 14 (2014) 4005] have been performed. These in situ experiments greatly complement our modeling efforts, and together they provide details and insight into how materials degrade in service due to combined electrochemical-mechanical actions [Nano Letters 15 (2015) 1302; Nano Letters 15 (2015) 1437].

Bio
Ju Li is BEA Professor of Nuclear Science and Engineering and Professor of Materials Science and Engineering at MIT. His group (http://Li.mit.edu) performs computational and experimental research on mechanical properties of materials, and energy storage and conversion. Ju obtained a PhD degree in nuclear engineering from MIT in 2000, and Bachelor's degree in Physics from University of Science and Technology of China in 1994. He is a recipient of the 2005 Presidential Early Career Award for Scientists and Engineers, 2006 MRS Outstanding Young Investigator Award, and 2007 TR35 award from Technology Review magazine. Thomson Reuters included Ju in its Highly Cited Researchers list in 2014, among 147 scientists world-wide in the Materials Science category. Ju was elected Fellow of the American Physical Society in 2014.
李巨是麻省理工学院核科学与工程系终身职教授，讲席教授，材料科学与工程系教授,美国物理学会会士 (APS Fellow)。他1994年毕业于中国科技大学少年班、近代物理系。2000年在麻省理工学院核工程系获得博士学位。 2002至2007年在俄亥俄州立大学材料系任助理教授、 2007至2011年在宾夕法尼亚大学材料系任副教授。李巨教授2005年获美国“青年科学家工程师总统奖”，2006年获美国材料学会杰出青年科学家奖（MRS OYI）。2014年汤森路透把他列入全球高被引科学家名单（highlycited.com，材料学共147人）。主要研究内容为计算材料学以及纳米材料(http://Li.mit.edu)