【报告人】Dr. Meng-Qiang Zhao 

【报告题目】A New Family of Two-Dimensional Materials

【报告时间】12月7日（周一）10:00-11:30

【报告地点】逸夫会议中心一层中心会议室

【报告内容简介】Two-dimensional (2D) materials, such as graphene, metal oxides/hydroxides, dichalcogenides, hexagonal boron nitride, and others are garnering increasing attention due to their unique properties. About 4 years ago, our group discovered a new class of 2D transition metal carbides and nitrides we labeled MXenes, because they are obtained by selectively etching the A-layers from their three-dimensional (3D) layered, parent compounds the Mn+1AXn, or MAX, phases. So far, synthesis of ~20 MXenes with different chemistries have been achieved. MXenes offer a unique combination of metallic conductivity and hydrophilicity, coupled with good mechanical properties. They have shown superior capacity for reversible intercalation of many metal cations (e.g. Li+, Na+, K+, Mg2+, Al3+, etc.), which, in turn, has led to their use as electrode materials in energy storage devices, such as supercapacitors, Li-ion and Na-ion batteries/capacitors, and Li-S batteries. Moreover, several methods, including introducing interlayer spacers, creating porous structures, and combining metal oxides or conductive polymers, have been utilized to significantly improve the electrochemical performance of MXenes. As a new family of 2D materials, MXenes also show great potential in the application of fuel cells, transparent conductors, separators, and catalysis, etc. 

【报告人简介】Meng-Qiang Zhao is currently a post-doctoral research associate in Prof. Yury Gogotsi’s in Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University (Philadelphia, USA). He received his BS in 2008 in the Department of Chemical Engineering, Tsinghua University (Beijing, China). In 2013, he received his PhD in Chemical Engineering in Tsinghua University under the guidance of Prof. Fei Wei. After that, he joined Prof. Yury Gogotsi’s group for the post-doctoral research. He has published more than 70 journal papers, including those in the top academic journals of Nature, Nature Communications, PNAS, Advanced Materials, Angewandte Chemie International Edition, etc. with more than 2000 citations. He has received numerous awards including “Excellent graduate for graduates in Beijing”, “The top class scholarship for graduates of Tsinghua University”, and “Honored graduated researcher awarded by the Ministry of Education of China”, etc.