Three-Dimensional Graphene and Transition Metal Dichalcogenides in Electrochemical Energy Conversion and Storage 

Wenjun Zhang

Address Center of Super-Diamond and Advanced Films (COSDAF), and Department of Materials Science and Engineering, City University of Hong Kong 

Abstract: The structure design of an electrode is one of the most important factors affecting its reaction kinetics, the capability of mass transportation with electrolyte, and consequently the performance of an electrochemical energy storage or conversion system. A successful approach that has been widely demonstrated is to construct a three-dimensional (3D) nanoscale-structured electrode, which enables enhanced ion and electron transport, increased active material loading, and improved mechanical stability. Ascribing to their combined superior inherent properties and the special structure configuration, 3D graphene and transition metal dichalcogenide (TMD) nanostructures have demonstrated promising applications in electrochemical energy conversion and storage. In this presentation, we report our recent progress in applying 3D graphene, TMD and related composites in the electrochemical electrode applications derived from their distinct merits of structure and properties, e.g., supercapacitor, lithium ion battery, vanadium redox flow battery, and fuel cells.

Biography:  Wenjun Zhang obtained his Doctor of Philosophy degree in 1994 from Lanzhou University. He was a postdoc at the Fraunhofer Institute for Surface Engineering and Thin Films (1995 to 1997) and at the City University of Hong Kong (1997 to 1998). From 1998 to 2000, he worked as a Science and Technology Agency Fellow at National Institute for Research in Inorganic Materials. He joined CityU in 2000 again as a Senior Research Fellow. He is currently a Professor in Department of Physics and Materials Science; and he is also the deputy of the Center Of Super-Diamond and Advanced Films (COSDAF). His research focuses on thin films, semiconducting nanomaterials, surface science and modification, and ions/materials interactions.