Pseudocapacitive Enhancement in Nanostructured Battery electrodes
Hong Jin Fan
Nanyang Technological University
Abstract: The performance of electrochemical energy storage devices relies largely on a scrupulous design of nanoarchitectures and smart hybridization of active materials. Nanoarray electrodes are particularly investigated for power source in microelectronics, which requires high rates, high areal capacity/capacitance and long cycle stability. When the metal-ion battery electrode materials are designed into nanostructures (e.g., 1D array, 2D nanosheets), there appear new charge storage processes that can boost the high-rate performance and long-cycle stability. Our group has been actively working on nanoarray materials directly on conductive substrates as electrodes for thin-film batteries. In this talk, I will articulate our material design strategies for both Li-ion and Na-ion storage electrodes and elaborate how the extrinsic pseudocapacitance effect contributes to the high-rate performance. These materials include VO2, SnS, and MoSeS. In addition, surface engineering and functionalization strategies, including atomic layer deposition and carbon dots will be mentioned for performance enhancement.
Biography: Dr. Fan is currently an associate professor at Nanyang Technological University (NTU). He received PhD from National University of Singapore in 2003, followed by postdoc at Max-Planck-Institute of Microstructure Physics, Germany and University of Cambridge. He joined NTU as Nanyang Assistant Professor in 2018. He is an editorial board member of Nanotechnology, Semiconductor Science and Technologies, advisory board member of Materials Today Nano (new) and several Wiley journals, and Associate Editor of Materials Research Bulletin. He has chaired or co-chaired several international major conferences including MRS in US and ICMAT2013, 2015, 2017, and 2019 in Singapore. He has published about 180 articles with an H-index of 60. He is among the Highly-cited Researchers list in 2016 and 2017. Dr. Fan’s research interests include nanomaterials for energy conversion and storage (including photolysis and electrolysis of water, batteries) and optical properties of low-dimensional semiconductors.