报告题目：MXene材料的多尺度调控及其储能性能
报告人：孙正明 教授，东南大学材料学院
报告时间：2020年 10月 31 日 下午 14:00-15:30
报告地点：物理科技楼101
报告人简介：孙正明，教授、博导、国家特聘专家、东南大学材料学院院长。东南大学本科，中科院金属所硕士，中科院金属所-维也纳大学联合培养博士。先后在中科院、维也纳大学（博士后）、日本丰桥技科大学（JSPS）、美国Drexel大学进行复合材料、金属间化合物、先进陶瓷等研究。回国前在日本产业技术综合研究所（AIST）任部长助理兼主任研究员。入选国家高层次人才计划。近年来，在金属性陶瓷MAX相材料、二维材料MXene等在能源环境领域的基础与应用研究中取得重要进展，得到国家重点研发、国家自然科学基金重点及面上、江苏省双创团队及人才等国家与地方的重大科研项目支持。获中国侨界贡献（创新人才）奖。
报告摘要：The MXenes are referring to a group of transition metal carbides or nitrides with graphene-like mono-layer nanostructure, which are generally derived from MAX phases by selectively etching of “A” layers. As a novel family of 2D materials, MXenes possess high electrical conductivity, remarkable chemical durability and intrinsic hydrophilic property, emerging as a fascinating candidate in the development of new electrode materials. However, there are still some urgent issues to be addressed before realizing its practical applications: an enhanced reaction kinetic is desired, and the energy/power density could be further increased. In addition, the re-stacking of laminates may result in serious degradation of their electrochemical properties.
Recently, we have been developingmultiscale manipulating strategies to improve the performance of MXene-based electrodes. Defect engineering has been carried out to tailor the chemical composition of MXenes, with the energy storage mechanisms of this material disclosed; mesoporous microstructure has been obtained by oxidation-etching treatment, bringing significant improvement to the specific capacitance; a highly efficient coordination-driven self-assembly strategy has been developed for the preparation of 3D network with controllable interface interaction and porous structure; acting as the conductive network, the MXene nanosheets have been successfully introduced into the polymeric hydrogels, which helps to expand its applications in flexible energy storage devices.
