报告题目：Cathode design for high-rate and long-cycle Zn-based batteries
报告人：Prof. Hong Jin Fan, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
Rechargeable aqueous zinc battery, as a novel promising candidate to grid-scale energy storage system, has drawn tremendous attention recently. Our group has been actively working in design nanostructured electrode materials for metal-ion batteries (Na, K, Zn), hybrid capacitors, and electrocatalysts for metal-air batteries. In this talk, I will present our latest results on new cathode materials for both Zn-ion battery and Zn-air battery. Specifically, we developed layered ZnOV nanosheets that are directly grown on a 3D graphite current collector. The assembled Zn-ion full cell based on this cathode and 3D Zn flake anode show high cyclic stability and rate performance compared to devices using Zn foils. We also studied the Zn ion storage mechanism in a new-type of layered vanadium oxyhydroxide nanobelts. In-situ XRD characterization and DFT calculation help to reveal the Zn intercalation process for both cases. As for the Zn-air battery cathode, through rational designed cathode materials, we achieved full batteries that can run more than 1000 hour without evident degradation. For this the cathode is composed of NiFe alloy fine particles uniform dispersed within CNTs which is proven an efficient catalyst for both OER and ORR.
Dr. Fan joined in NTU as Nanyang Assistant Professor in 2008, promoted to Associate Professor with tenure in 2014, and full professor in 2019. He received PhD in Physics from National University of Singapore in 2003, followed by postdoc at Max-Planck-Institute of Microstructure Physics, Germany and University of Cambridge. His research interests include energy materials and physics, including photo- and electrocatalysis water splitting for hydrogen generation, and future batteries. He has authored and co-authored more than 220 journal papers, with an H-index of 74. He is selected as Fellow of Royal Society of Chemistry (FRSC), and has been consecutively recognized as Highly Cited Researchers since 2016 (Clarivate Analytics). He is currently Associate Editor of the journal Materials Today Energy, and editorial board member of 8 journals. He has done a significant amount of service to the scientific communities by organizing conferences and symposia over the years, including Materials Research Society (MRS) in the US and ICMAT in Singapore.