东吴新能源论坛第十一期

Yury Gogotsi is Distinguished University Professor and Bach Endowed Professor of Materials Science and Engineering at Drexel University and a 1000 Talents Plan Distinguished Foreign Professor. He is the founding Director of the A.J. Drexel Nanomaterials Institute and Associate Editor of ACS Nano. He works on nanostructured carbons and two-dimensional carbides for energy related and biomedical applications. His work on selective extraction synthesis of carbon and carbide nanomaterials with tuneable structure and porosity had a strong impact on the field of capacitive energy storage. He has co-authored 2 books, more than 500 journal papers and obtained more than 50 patents. He has received numerous national and international awards for his research. He was recognized as Highly Cited Researcher (Web of Science) in Materials Science and Chemistry fields in 2014-2017, and elected a Fellow of AAAS, MRS, ECS, RSC, ACerS, NANOSMAT Society and a member of the World Academy of Ceramics. He also serves on the MRS Board of Directors.

报告摘要：

MXenes are a large and quickly growing family, already about 30 members, of two-dimensional (2D) transition metal carbides and nitrides with composition of Mn+1XnTz; where M is an early transition metal (e.g. Ti, V, Nb, Mo, etc.), X is carbon and/or nitrogen, n can be 1, 2, or 3, and Tz stands for surface terminations (O, OH and F) [1]. They exhibit unique properties, for example they are electrically conductive and hydrophilic, which is a rare combination in 2D materials. MXenes can be intercalated with a wide range of molecules and ions. Since their discovery in 2011, MXenes were found to be very promising materials for many applications (e.g., electrical energy storage and harvesting, water purification, conductive support, etc.). Among these applications, using them as electrode materials for electrochemical energy storage attracted most of the attention for their superior capability to handle high cycling rates with high energy for both ion-batteries and supercapacitors. Herein, we will shed a light on the recent advances in MXene synthesis [2] and use as electrode materials for supercapacitors [3]. We will also present the recent findings using neutron scattering and other structural characterization techniques in addition to scanning probe techniques combined with computational study to reveal fundamental details on changes in MXenes upon ions intercalation and mechanism of energy by MXenes in various electrolytes.

References

1. B. Anasori, et al., 2D Metal Carbides and Nitrides (MXenes) for Energy Storage, Nature Reviews Materials, 2, 16098 (2017)

2. A. Alhabeb, et al., Guidelines for Synthesis and Processing of Two-Dimensional Titanium Carbide (Ti3C2Tx MXene), Chemistry of Materials, 29, 7633 (2017)

3. Y. Xia, et al, Thickness Independent Capacitance of Vertically Aligned Liquid Crystalline MXenes, Nature, 557, 409 (2018)