题目：Hybrid Nano Battery-supercapacitor Materials for Renewable Energy Storage Applications

报告人：C.P.Wong院士

报告地点：动力与机械学院报告厅

报告时间：2017年12月8日(星期五)下午16:00

Abstract

   To combat global warming, reduction in carbon emission in our environment is imperative. Renewable energy sources such as solar and wind energies are some of the potential alternatives. However, these technologies are intermittence energy sources that storage technology is essential. We have developed a supercapacitor coupled with redox and double layer capacitor materials that can believe a record high capacitance. A nanocasting strategy is used to synthesize graphene/porous Fe2O3 nanocomposite, which integrates high redox activity of Fe2O3with high electronic conductivity of graphene scaffold. Thanks to its nanostructure, porous structure and heterostructure, this material shows a significantly high capacitance of 1095 F g–1 at the current density of 3A g–1. An aqueous asymmetric pseudocapacitor is also assembled by combing the graphene/porous Fe2O3 nanocomposite and a Co-Ni-layered double hydroxide (LDH) composite, and delivers very promising energy and power densities of 98.0 W h kg–1 and 22,826 W kg–1, ranking among the best supercapacitors. Besides, we have developed other supercapacitor systems, e.g., curved-graphene-based symmetric supercapacitor, Cu(OH)2//activated carbon all-solid-state asymmetric supercapacitor, and Co-Ni-LDH/FeOOH aqueous pseudocapacitor. The material synthetic conditions are optimized to realize high energy storage appications.

About The Lecturer

    Professor C.P. Wong is the Dean of Engineering, The Chinese University of Hong Kong(CUHK). He is on a long leave from the School of Materials Science and Engineering at Georgia Tech (GT) where is a Regents’ Professor and the Charles Smithgall Institute-endowed Chair(one of two GT Institute-endowed chairs) on a long leave to CUHK Prior to joining GT, he was with AT&T Bell Laboratories for many years and was elected an AT&T Bell Labs Fellow(the highest technical award bestowed by Bell Labs) in 1993 for his contributions to achieve reliability without hermeticity packaging of semiconductor integrated devices(ICs) that fundamentally improved the IC performance and reduced cost. Prof. Wong received his BS degree from Purdue University, MS and PhD degrees from The Pennsylvania State University and a postdoc at Stanford University with the late Nobel Laureate Professor Henry Taube. He is the person who synthesized the first- known lanthanide and actinide porphrin complexes that represented a breakthrough in metalloporphrin chemistry. His current research interests focus on the areas of materials and processes for electronic, photonic, MEMS, sensors, and energy harvesting and storage. He has published over 1,000 technical papers, 12 books and holds over 65 US Patents. Prof. Wong served as the IEEE Component Packaging and Manufacturing Technology (CPMT) Society President in 1992 and 1993 and has received many awards : the 1996 IEEE CPMT Sustained Technical Contributions Award in 1996, the 2000 IEEE Millennium Medal, the 2012 IEEE CPMT Exceptional Contribution Award, 2006 IEEE CPMT Field Award, the 2009 IEEE CPMT David Feldman Award, the 2013 International Dresden Barkhauser Award(Germany). He is a member of the US National Academy of Engineering(in 2000) and a Foreign Academician of the Chinese Academy of Engineering(in 2013).