2D single- and few-layered MXenes: synthesis, applications and perspectives

Abstract

Transition metal carbides and nitrides (MXene), as a promising class of two-dimensional inorganic compounds, are materials composed of a few atomic layers of transition metal carbides, nitrides, or carbonitrides. The...

Ti3C2Tx MXene embedded metal–organic framework-based porous electrospun carbon nanofibers as a freestanding electrode for supercapacitors

“…MXenes can be synthesized by selective etching of A from the MAX phase (Ti 3 AlC 2 ) and is generally represented as M n+1 X n T x (n = 1, 2, 3), where M, X, and T x (x is a variable) represent early transition metals, carbon, and/or nitrogen and surface terminating functionalities such as -OH, -O and -F groups, respectively. 23,24 More than 30 MXenes have been discovered experimentally to date, and more number compositions have been predicted, but the most extensively studied MXene for supercapacitors is Ti 3 C 2 T x due to its high metallic conductivity, sufficient surface terminating functional groups, hydrophilicity, high specic surface area, and unique morphology. 25 Nonetheless, Ti 3 C 2 T x MXenes suffer from the restacking of individual layers due to hydrogen bonding and van der Waals interactions, resulting in a decrease in the surface area and pathways for electrons and electrolytes.…”

Elucidation of the Charging Mechanisms and the Coupled Structural–Mechanical Behavior of Ti3C2Tx (MXenes) Electrodes by In Situ Techniques

“…Being the very basic building block of bulk electrodes, such studies will provide highly valuable information about the intrinsic characteristics of the MXene. [ 69 ] As the multilayer arrangement of the MXene electrodes has a determinantal influence on its electrochemical behavior and other potential‐induced phenomena, analysis at the single‐layer level will significantly expand our understanding of the MXenes’ nature and facilitate the further enhancement of its charge storage capabilities.…”

MXene/Ferrite Magnetic Nanocomposites for Electrochemical Supercapacitor Applications

“…MXene can be prepared through a top-down approach whereby the etching takes place using bottom-up methods, including chemical vapor deposition, pulsed laser deposition etc. [ 31 , 32 , 33 ]. However, the bottom-up approach has some limitations including the availability of precursors and desired size, which could be a challenging process through the chemical synthesis or chemical exfoliation process.…”