Functional MXene Materials: Progress of Their Applications

Abstract

Nowadays, two-dimensional materials have many applications in materials science. As a novel two-dimensional layered material, MXene possesses distinct structural, electronic, and chemical properties; thus, it has potential applications in many fields, including battery electrodes, energy storage materials, sensors, and catalysts. Up to now, more than 70 MAX phases have been reported. However, in contrast to the variety of MAX phases, the existing MXene family merely includes Ti C, Ti C , (Ti , Nb ) C, (V , Cr ) C , Nb C, Ti CN, Ta C , V C, and Nb C . Among these materials, the Ti C T MXene exhibits prominently high volumetric capacitance, and the rate at which it transports electron is suitable for electrode materials in batteries and supercapacitors. Hence, Ti C T is commonly utilized as an electrode material in ion batteries such as Li , Na , K , Mg , Ca , and Al batteries. What is more, Ti C has the biggest specific surface area among all of these potential MXene phases, and therefore, Ti C has remarkably high gravimetric hydrogen storage capacities. In addition, Ti CO materials display extremely high activity for CO oxidation, which makes it possible to design catalysts for CO oxidation at low temperatures. Furthermore, Ti C T with O, OH, and/or F terminations can be used for water purification owing to excellent water permeance, favorable filtration ability, and long-time operation ability. This review supplies a relatively comprehensive summary of various applications of MXenes over the past few years.

Recent advances in MXenes: From fundamentals to applications

“…Most experimental investigations have mainly focused on the excellent electrochemical behavior of MXenes for energy storage as ion batteries, gas storage, and various catalysis applications because of their large exposed surface area, hydrophilic nature, adsorption ability, and surface activities. The latest applications and developments of MXenes have been summarized in the recent review article [11,15,16,17,18,19,20,21,22,23,24,25,26].…”

A Hybrid Assembly of MXene with NH2−Si Nanoparticles Boosting Lithium Storage Performance

“…MXene, an emerging class of two dimensional transition metal carbides after graphene, exhibits attractive metallic conductivity in virtue of its lamellar electronic transfer channels. [8][9][10][11] Excitingly, MXene, superior to graphene, features an exceptional combination of rich compositions and surface chemistry, surface hydrophilicity, and energy storage functionalities, offering unique advantages for energy-related applications. [12] Among the MXene family, titanium carbide (Ti 3 C 2 T x ) is the most intensively studied and can be used as the host material for LIBs due to its considerable theoretical capacity (320 mAh g À 1 ), lower Li diffusion barrier (0.07 eV), large potential range from ca.…”

Carbon Nanotube Yarn for Fiber‐Shaped Electrical Sensors, Actuators, and Energy Storage for Smart Systems

“…The transition metal MXene has created interests in a conducting guest material to be used in various areas of supercapacitor . The MXenes are a new conducting material with high electrical conductivity (≈9880 S cm −1 ) and hydrophobic surface, which is composed of carbides, nitrides, or carbonitrides . As a capacitor, it has been revealed that the intercalation of cations into layered surface of hydrophilic Ti 3 C 2 MXene provides excellent volumetric capacitance of ≈1500 F cm −3 .…”