报告人:Prof.Jiazhao Wang,University of Wollongong
报告时间2020/10/31 13:00-16:30
报告地点：腾讯会议：https://meeting.tencent.com/s/bl0cHW9qRZJD，
会议ID：183 251 455，直播地址：https://meeting.tencent.com/l/RVVN6mpBywIt
Abstract:Due tolimited global energy supplies, environmental pollution, and the increasing consumption of energy,greenand efficient energy storage devices are in high demandin modern society.The rechargeable lithium-sulfur and lithium-air batteries currently enjoy great scientific interest because theoretically, they can store significantly more energies, which possible exceed that of lithium-ion batteries (LIBs). Sodium-ion batteries (SIBs) have recently been considered as an alternative to LIBs due to the low-cost and natural abundance of sodium. Our recently work on Li-S batteries, Li-O2batteriesandSIBswill be presented in this lecture.
Sulfur has the highest theoretical specific capacity of 1675 mAh g−1among all solid cathode materials,as well as being low-cost and nontoxic.Its low active material utilization, however, and poor cycle life are obstructing the application of Li-S batteries. Carbon materials and comducting polymers have been studied as the conductive additives to improve the performance.
A Li-O2battery could reach an energy density 3-4 times higher than state-of-the-art LIBs at the cell level. Research on the Li-O2battery, however, is currently still in the early stages of understanding the basic scientific principles and mechanisms, and there are significant technical challenges confronting the development of advanced materials for Li-O2batteries. Metal oxides, transition metal-doped perovskite oxide, Ru porous carbon composites and Pd-based composites have been invested as air-cathode materials.
A major challenge in advancing sodium-ion batteries is tofind appropriate Na storage electrode materials.One of the main obstacles to the commercialization of NIBs is the limited choice of anode materials that can provide good stability and high-rate performance. Carbon materials, phosphorus-based and Sn-based composites have been invested in our group.
Biography:
Jiazhao Wang is a Professor at the Institute for Superconducting and Electronic Materials, University of Wollongong, Australia. She obtained her Ph.D. degree from the University of Wollongong in 2003. Her research activities are focused on electrochemical energy storage in batteries, including Li-ion batteries, Li-Air batteries, Li-S batteries, Na-ion batteries and Lead-acid batteries. She has won 27 research grants including 17 Australian Research Council (ARC) grants as a chief investigator. She has successfully managed and completed 6 ARC projects as a team leader. She has published more than 180 refereed journal papers (Citation = 11426, and H-index = 58. Google Scholar, 15th February), including, Energy Environ. Sci., Adv. Mater., Adv. Energy Mater., Angew. Chem.. Int. Ed., Nano Lett., Nano Energy and Chem. Mater. et al.. She has been serving as a regular referee for more than 50 prestigious international journals.
