By Prof. Hao Gong, Department of Materials Science and Engineering, National University of Singapore, Singapore.
Batteries and supercapacitors are the major electrical energy storage devices. The former is well known and widely used in our daily life. The latter is much less known but has been used in several applications. A supercapacitor has unique advantages but also faces challenges comparing with a battery. The big advantages include short charging time and high electrical current tolerance. The major challenge is the relatively small energy storage capacity. Recent development and achievement in supercapacitor research and technology have made supercapacitors in commercial production and applications. However, it is desired to develop high energy density supercapacitors. This presentation will introduce various supercapacitors, and concentrate on psudocapacitors and hybrid supercapacitors as high energy storage devices. Electrochemical performance is affected by processing, structure, morphology, surface area etc. The case of nickel oxide based nanoparticles and heterostructures as supercapacitor electrode is discussed. The very high specific capacitance and energy density achieved are discussed.
Dr. Hao GONG is a Full Professor of Materials Science and Engineering at National University of Singapore. He is also the coordinator of the transmission electron microscopy laboratory at Department of Materials Science and Engineering. His research interests include transparent oxide conductors and semiconductors (n-type and p-type), energy storage materials and devices (mainly supercapacitors), energy harvest materials and devices (mainly solar cells), gas sensors, functional thin film and nano-materials, materials characterization (mainly on transmission electron microscopy and electron diffraction).
Dr. Gong received his B.S. degree in Physics at Yunnan University in 1982. He passed his M.S. courses in Yunnan University, carried out his M.S. thesis research work at Glasgow University, UK, and received M.S. degree of Electron and Ion Physics at Yunnan University in 1987. He then did his PhD at Materials Laboratory at Delft University of Technology, the Netherlands, and obtained PhD degree there in 1992. He joined National University of
Singapore in 1992, and is currently full professor at Department of Materials Science and Engineering. He has published about 200 refereed papers in major international journals and a few US patents. He has delivered several invited talks at international conferences. He has been chairman or committee member of several international conferences, and editor of special issues of some journal.