High-strength scalable MXene films through bridging-induced densification

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 electric...

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Published in:Science (American Association for the Advancement of Science) 2021-10, Vol.374 (6563), p.96-99
Main Authors: Wan, Sijie, Li, Xiang, Chen, Ying, Liu, Nana, Du, Yi, Dou, Shixue, Jiang, Lei, Cheng, Qunfeng
Format: Article
Language:English
Subjects:
Bonding agents
Chemical bonds
Densification
Electrical conductivity
Electrical resistivity
Electromagnetic shielding
Mechanical properties
Metal carbides
MXenes
Nitrides
Platelets
Tensile strength
Titanium
Titanium carbide
Toughness
Transition metals
Voids
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cited_by cdi_FETCH-LOGICAL-c325t-f2f5aa7c16148708d65f054f3245b12d7b49961ef216855da9cb43d909f886643
cites cdi_FETCH-LOGICAL-c325t-f2f5aa7c16148708d65f054f3245b12d7b49961ef216855da9cb43d909f886643
container_end_page 99
container_issue 6563
container_start_page 96
container_title Science (American Association for the Advancement of Science)
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creator Wan, Sijie
Li, Xiang
Chen, Ying
Liu, Nana
Du, Yi
Dou, Shixue
Jiang, Lei
Cheng, Qunfeng
description 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.
doi_str_mv 10.1126/science.abg2026
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subjects Bonding agents
Chemical bonds
Densification
Electrical conductivity
Electrical resistivity
Electromagnetic shielding
Mechanical properties
Metal carbides
MXenes
Nitrides
Platelets
Tensile strength
Titanium
Titanium carbide
Toughness
Transition metals
Voids
title High-strength scalable MXene films through bridging-induced densification
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