报告题目：Electrochemical Routes to Materials for Energy: High-Performance Li-ion Batteries, and Micro-Optics for Displays and Solar Energy
报告人：Prof. Paul Braun, Department of Materials Science and Engineering, Johns Hopkins University，Urbana, IL, USA
Paul Braun is the Director of the Frederick Seitz Materials Research Laboratory and the Ivan Racheff Professor of Materials Science and Engineering at the University of Illinois at Urbana-Champaign (UIUC). Prof. Braun received his B.S. degree with distinction from Cornell University, and his Ph.D. in Materials Science and Engineering from UIUC. Following a postdoctoral appointment at Bell Labs, Lucent Technologies, he joined the faculty at UIUC. Prof. Braun has co-authored a book, about 200 papers （including publications in Nature, Science, Nature materials, Nature Nanotechnology), and multiple patents, and has co-founded two companies. He is the recipient of a Friedrich Wilhelm Bessel Research Award (2010), a Beckman Young Investigator Award (2001), a 3M Nontenured Faculty Award, and the 2002 Robert Lansing Hardy Award from TMS. In 2006, he was named University Scholar by the University of Illinois, and in 2011 was named the Ivan Racheff Professor of Materials Science and Engineering.
New synthetic routes often provide opportunities for innovation. Recently we have made considerable advances in the electrodeposition of high performance Li-ion anode and cathode materials both as solid films, and on 3D meso- structured templates. The capacities are often near- theoretical, and in some cases the materials also exhibit high rate performance. The electrodeposition method significantly broadens the scope of battery form factors andfunctionalities, enabling a variety of highly desirable battery properties includingmicrobatteries, and high energy, high power, and flexible designs. Also using electrochemistry, both 3D gradient refractive index optics and 3D photonic crystals were formed For example, via electrochemical etching of silicon, followed by materials conversion, 3D gradient refractive index micro-optics, were formed. Elements including flat lenses, Bragg mirrors, polarization sensitive optical splitters and structures with nearly arbitrary refractive index distributions were formed with a particular focus on micro-optics important for solar energy harvesting and flat panel displays.