Ultrastrong MXene film induced by sequential bridging with liquid metal

• 成果类型: Article
• 署名作者: Li, Wei; Zhou, Tianzhu; Zhang, Zejun; Li, Lei; Lian, Wangwei; Wang, Yanlei; Lu, Junfeng; Yan, Jia; Wang, Huagao; Wei, Lei; Cheng, Qunfeng
• 署名单位: Beihang University; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Nanyang Technological University; Renmin University of China; University of Shanghai for Science & Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13637
• DOI: 10.1126/science.ado4257
• 发表日期: 2024-07-05
• 页码: 62-68
• 关键词: total-energy calculations; shielding effectiveness; performance; fabrication; lightweight; ultralight

摘要

Assembling titanium carbide (Ti3C2Tx) MXene nanosheets into macroscopic films presents challenges, including voids, low orientation degree, and weak interfacial interactions, which reduce mechanical performance. We demonstrate an ultrastrong macroscopic MXene film using liquid metal (LM) and bacterial cellulose (BC) to sequentially bridge MXene nanosheets (an LBM film), achieving a tensile strength of 908.4 megapascals. A layer-by-layer approach using repeated cycles of blade coating improves the orientation degree to 0.935 in the LBM film, while a LM with good deformability reduces voids into porosity of 5.4%. The interfacial interactions are enhanced by the hydrogen bonding from BC and the coordination bonding with LM, which improves the stress-transfer efficiency. Sequential bridging provides an avenue for assembling other two-dimensional nanosheets into high-performance materials.