High-strength scalable MXene films through bridging-induced densification

作者：Sijie Wan, Li Xiang, Ying Chen, Nana Liu, Yi Du, Shi Xue Dou, Lei Jiang, Qunfeng Cheng · 发表于：Science · 年份：2021 · DOI：10.1126/science.abg2026 · 被引用次数：696 · 研究领域：Electromagnetic wave absorption materials、MXene and MAX Phase Materials、Advanced Antenna and Metasurface Technologies

MXenes are a growing family of two-dimensional transition metal carbides and/or nitrides that are densely stacked into macroscopically layered films and have been considered for applications such as flexible electromagnetic interference (EMI) shielding materials. However, the mechanical and electrical reliabilities of titanium carbide MXene films are affected by voids in their structure. We applied sequential bridging of hydrogen and covalent bonding agents to induce the densification of MXene films and removal of the voids, leading to highly compact MXene films. The obtained MXene films show high tensile strength, in combination with high toughness, electrical conductivity, and EMI shielding capability. Our high-performance MXene films are scalable, providing an avenue for assembling other two-dimensional platelets into high-performance films.