High-Yield Exfoliated\nMXene Nanosheets through Vapor Energy-Driven Delamination

MXene is a two-dimensional nanosheet material with a\nstructure akin to graphene and has drawn considerable attention for\nits unique large-scale layer architecture, exceptional electrical\nconductivity, and hydrophilic properties. At present, ultrasonic oscillation\nis utilized to exfoliate and produce high-quality MXene nanosheets.\nNonetheless, this technique can lead to the fracture of the lamellar\nstructure, and the yield of high-quality MXene is only up to 10–20%.\nHence, this study proposed a simple exfoliation strategy that uses\nthe energy generated by water vapor to exfoliate bulk MXene into thin\nhigh-quality MXene nanosheets. The entire process is easy and environmentally\nfriendly, accompanied by a yield of up to 73%. Also, after exfoliation,\nthe obtained MXene nanosheets demonstrate an exceptional conductivity\nof 5824 S/cm. When used as a conductive additive incorporated into\nthe LTO anode, it showed a high and stable reversible cycling capacity\nof 143 mAh g<sup>–1</sup> after 400 cycles. Our work not only\ndelivers a straightforward and safe technique for the synthesis of\nhigh-quality MXene nanosheets but also provides a reference for its\napplication in specific fields.