Biography
Dr. Wenhui Wang
Dr. Wenhui Wang
Harbin Institute of Technology, Shenzhen, China
Title: Developing stable Sn-based materials and Na metal as anodes for high-energy Na batteries
Abstract: 
The development of high-energy Na batteries is significantly limited by a stable anode with high capacity and low operating voltage. In this regard, Sn-based materials and Na metal are promising anode candidates due to their high theoretical capacity and low redox potential. However, both of them suffer from poor cycle stability due to their corresponding intrinsic problems. In this talk, our understanding and the proposed remedy approaches to these two systems will be presented and discussed based on our work in recent years1-8.

Reference

1 Hou, Z. et al. Poly(vinylidene difluoride) coating on Cu current collector for high-performance Na metal anode. Energy Storage Materials 24, 588-593, doi:10.1016/j.ensm.2019.06.026 (2020).
2 Zhang, J. et al. Three-dimensional carbon felt host for stable sodium metal anode. Carbon 155, 50-55, doi:10.1016/j.carbon.2019.08.050 (2019).
3 Hou, Z. et al. Hybrid Protective Layer for Stable Sodium Metal Anodes at High Utilization. ACS applied materials & interfaces 11, 37693-37700, doi:10.1021/acsami.9b12059 (2019).
4 Zhang, J., Wang, W. & Li, B. Enabling high sodium storage performance of micron-sized Sn4P3 anode via diglyme-derived solid electrolyte interphase. Chemical Engineering Journal 392, 123810, doi:10.1016/j.cej.2019.123810 (2020).
5 Wang, W., Shi, L., Lan, D. & Li, Q. Improving cycle stability of SnS anode for sodium-ion batteries by limiting Sn agglomeration. Journal of Power Sources 377, 1-6, doi:10.1016/j.jpowsour.2017.11.084 (2018).
6 Wang, W., Zhang, J., Yu, D. Y. W. & Li, Q. Improving the cycling stability of Sn4P3 anode for sodium-ion battery. Journal of Power Sources 364, 420-425, doi:10.1016/j.jpowsour.2017.08.060 (2017).
7 Wang, W., Zhang, J., Li, B. & Shi, L. Electrochemical investigation of Sn-Co alloys as anode for Na-ion batteries. Journal of Alloys and Compounds 780, 565-569 (2019).
8 Wang, W., Shi, L. & Li, Q. Porous SnSbNPs@3D-C Anode with Improved Stability for Sodium-Ion Battery. Journal of The Electrochemical Society 165, A1455-A1459, doi:10.1149/2.0811807jes (2018).
Biography: 
Wenhui Wang is an Assistant Professor at Harbin Institute of Technology, Shenzhen (HITSZ). He got Ph.D. degree from The Chinese University of Hong Kong in 2018 and then employed as a Senior Research Associate at City University of Hong Kong before HITSZ. His research interests focus on synthesis of inorganic materials and their application in energy storage and environmental engineering. He and his group have made a significant contribution to understand the fading mechanism of Sn-based anodes for Na-ion battery and proposed several effective remedy approaches. Moreover, he also largely contributed to improve the electrochemical performance of Na metal anode through constructing an artificial solid electrolyte interphases (SEI) using scalable but effective approach. In environmental engineering, he and his group has proposed a universal approach (i.e. introducing electronic mediator) to overcome the sluggish reduction kinetics of Fe3+ to active Fe2+ in Fenton process, which is one of the major factors limiting the practical application of Fenton process. So far, he has published more than 43 peer-review journal papers in the related field.