报告题目：From MAX to MXene - From 3D to 2D
报 告 人：Michel W. Barsoum, Department of Materials Science and Engineering Drexel University, 瑞典皇家工程科学院外籍院士，美国陶瓷学会Fellow，Materials Research Letters期刊主编，Ceramics International、Results in Physics和FlatChem期刊编辑。
邀 请 人：张建峰、应国兵
By now it is well-established that the layered, hexagonal carbides and nitrides with the general formula, Mn+1AXn, (MAX) where n = 1 to 3, M is an early transition metal, A is an A-group (mostly IIIA and IVA) element and X is either C and/or N – sometimes referred to as polycrystalline nanolaminates because every basal plane is a potential deformation or delamination plane - combine some of the best attributes of metals and ceramics. They are excellent conductors of heat and electricity, damage and thermal shock tolerant and fracture toughness values as high as 15 MPa√m. Some are lightweight, stiff and have good creep and outstanding oxidation resistance. In 2011 we showed that by simply immersing MAX phase powders, at room temperature, in HF the A-layers are selectively etched to produce 2D materials that we labeled MXenes to emphasize the loss of the A-group element and their similarities to graphene. Currently there are over 20 new compositions with new ones discovered regularly. Unlike hydrophobic graphene, MXenes are hydrophilic and behave as “conductive clays”, or 2D metals, a hitherto unknown combination. MXenes such as Ti2C, V2C, Nb2C and Ti3C2 can be used as electrode materials in lithium-ion batteries (LIBs) and supercapacitors (SC) as well as transparent conductive electrodes, with performances that are quite impressive. The potential of using MXenes in energy storage, as transparent conductive electrodes, EMI shielding among other applications will be highlighted.
Prof. Michel W. Barsoum is Distinguished Professor in the Department of Materials Science and Engineering at Drexel University. He is an internationally recognized leader in the area of MAX phases and more recently the 2D solids labeled MXenes. Most recently he also discovered a new mechanism – ripplocations - in the deformation of layered solids. With almost 400 refereed publications and a h index > 70, his work has been highly cited. He is an International Fellow of the Royal Swedish Academy of Engineering Sciences, Fellow of the American Ceramic Soc. and the World Academy of Ceramics. He is the author of two entries on the MAX phases in the Encyclopedia of Materials Science and the books, MAX Phases: Properties of Machinable Carbides and Nitrides and Fundamentals of Ceramics, a leading textbook in his field. In 2000 he was awarded a Humboldt-Max Planck Research Award for Senior US Research Scientists. Since 2008 he has been a visiting professor at Linkoping University in Sweden. He spent his last sabbatical year at Imperial College in London and the Grenoble Institute of Technology in France. He was also a recipient of a Chair of Excellence from the Nanosciences Foundation in Grenoble in 2017.
报告人Michel W. Barsoum简介: 美国德雷塞尔大学（Drexel University）材料科学与工程系杰出教授（Distinguished Professor）、讲席教授（A. W. Grosvenor Professor），世界陶瓷科学院院士，瑞典皇家工程科学院外籍院士，美国陶瓷学会Fellow，2009年SCI论文被引用最多作者之一（ISI's Most Highly Cited Authors List 2009）。1985年从美国麻省理工学院材料系获得博士学位后在德雷塞尔大学材料系工作，历任助理教授、副教授、教授、讲席教授与杰出教授。2000年获得洪堡基金资助在德国马普所访问研究，2008-2009年在美国洛斯阿拉莫斯国家实验室访问研究。瑞典林雪平大学、法国普瓦提埃大学访问教授，中科院宁波材料研究所特聘研究员。其研究主要在MAX/MXene材料研究领域，已经在Nature，Science等学术杂志发表360多篇论文，被引用17500多次，H指数>70。获得15项授权的美国专利。Materials Research Letters期刊主编，Ceramics International、Results in Physics和FlatChem期刊编辑。