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 developing. 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.

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