演講快訊

2023
05.19

Asymmetrically Architectured Polymer Membranes for Lithium Metal Battery Applications

官韋帆 教授

時間:2023年05月19日 (五) 15:10
主持人:龔仲偉 教授
講者:官韋帆 教授
服務單位:長庚大學 化學工程與材料工程學系
講題:Asymmetrically Architectured Polymer Membranes for Lithium Metal Battery Applications
地點:93456

摘要 :

Lithium metal has long been considered as an attractive anode material in lithium metal batteries due to its superior specific capacity compared to the existing graphite-based anode. However, stabilizing the lithium-metal anodes from uncontrollable lithium dendrite growth is still a critical challenge that limiting their practical applications. In this presentation, I will introduce an asymmetric design of polymer membrane with tailored pore structure in order to restrict the lithium dendrite growth while promoting the transport of lithium ions. Under the optimal conditions, we successfully fabricated polymer membranes with a bi-continuously nanoporous top layer with increasing pore sizes toward bottom surface. This unique structure provides the membranes exciting transporting properties including high ionic conductivity and high transference number. Additionally, the Li/LiFePO4 battery tests demonstrate that the cell with asymmetric membrane outperforms the cell with commercial separator and symmetric membrane in terms of specific capacity, rate capability, and cycling stability, revealing a promising potential for applications in high-energy-density lithium metal batteries.

學經歷 :

Education

2009 – 2015  Ph.D., Chemical & Biomolecular Engineering, University of Delaware

2004 – 2008  Bachelor, Chemical Engineering, National Taiwan University

 

Work experience

2021– Present  Assistant Professor, Chang Gung University, Taiwan

2020 – 2021  Postdoctoral Researcher, National Taiwan University, Taiwan

2017 – 2019  Senior Chemist, Solid State Battery Inc., USA

2016 – 2017  Fabrication Engineer, Astrileux Corporation, USA