Prof. Tseung-Yuen TsengLifetime Chair Professor
Institute of Electronics
National Yang Ming Chiao Tung University
Speech Title: Porous 3D Cross-Linked Graphene for Supercapacitor Application
Abstract: A simple, eco-friendly, cost-effective heteroatoms (nitrogen, phosphorus, and fluorine) co-doped graphene oxide (NPFG) is synthesized by hydrothermal functionalization and freeze-drying approach. The effect of different heteroatoms doping on the energy storage performance of synthesized reduced graphene oxide is investigated extensively. This study demonstrates that the nitrogen, phosphorous, and fluorine co-doped graphene (NPFG-0.3) synthesized with the optimum amount of pentafluoropyridine and phytic acid (PA) exhibits a notably enhanced specific capacitance (319 Fg-1 at 0.5 Ag-1), good rate capability, short relaxation time constant (τ = 28.4 ms), and higher diffusion coefficient of electrolytic cations (Dk+ = 8.8261×10-9 cm2 s–1) in 6 M KOH aqueous electrolyte. A symmetric coin cell supercapacitor device fabricated using NPFG-0.3 as the anode and cathode material with 6 M KOH aqueous electrolyte exhibit maximum specific energy of 38 W h kg-1, the maximum specific power of 716 W kg-1, and ~88.2% capacitance retention after 10000 cycles.
Keywords: doped graphene, supercapacitor, electrode, electrochemical properties
Biography: Prof. Tseung-Yuen Tseng is now a Lifetime Chair Professor in the Institute of Electronics, National Yang Ming Chiao Tung University. He was the Dean of College of Engineering(2005-2007), the Vice Chancellor and University Chair Professor(2007-2009) of the National Taipei University of Technology, Taipei, Taiwan.
Dr. Tseng’s professional interests are electronic ceramics, nanoceramics, ceramic sensors, high-k dielectric films, ferroelectric thin films and their based devices, energy materials and resistive switching memory devices. He has published over 430 research papers in refereed international journals and 170 conference papers(over 80 keynote and invited talks), 7 books, and held 36 patents. He invented the base metal multilayer ceramic capacitors, which have become large scale commercial product. He was Chair of the Board of Asian Ferroelectrics Association and General Chair of The 6th Asian Meeting of Ferroelectrics. He has received numerous awards, such as Distinguished Research Award from the National Science Council, IEEE CPMT Exceptional Technical Achievement Award, Academic Award and National Endowed Chair Professor from Ministry of Education, IEEE CPMT Outstanding Sustained Technical Contribution Award, and Distinguished Achievement Award of the Phi Tau Phi Scholastic Honor Society (2018). He was elected a Fellow of the American Ceramic Society, IEEE Fellow, MRS-T Fellow and APAM Academician.