Li-ion storage properties of two-dimensional titanium-carbide synthesized via fast one-pot method in air atmosphere

Abstract

Structural bidimensional transition-metal carbides and/or nitrides (MXenes) have drawn the attention of the material science research community thanks to their unique physical-chemical properties. However, a facile and cost-effective synthesis of MXenes has not yet been reported. Here, using elemental precursors, we report a method for MXene synthesis via titanium aluminium carbide formation and subsequent in situ etching in one molten salt pot. The molten salts act as the reaction medium and prevent the oxidation of the reactants during the high-temperature synthesis process, thus enabling the synthesis of MXenes in an air environment without using inert gas protection. Cl-terminated Ti3C2Tx and Ti2CTx MXenes are prepared using this one-pot synthetic method, where the in situ etching step at 700 °C requires only approximately 10 mins. Furthermore, when used as an active material for nonaqueous Li-ion storage in a half-cell configuration, the obtained Ti2CTx MXene exhibits lithiation capacity values of approximately 280 mAh g−1 and 160 mAh g−1 at specific currents of 0.1 A g−1 and 2 A g−1, respectively.

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

“…[18][19][20][21] In particular, transition metal compound (TMC)-based nanomaterials with dramatical chemical/physical superiorities (e.g., high theoretical capacitance, natural abundance, and attractive conductivity) have been extensively utilized as pseudocapacitive electrodes in energy storage systems (e.g., sodium-ion batteries, supercapacitors, lithium-ion batteries, and desalination cells). [8,[22][23][24] Nevertheless, bare TMC-based CDI electrodes, which have unsatisfactory desalination capacity and inferior durability, still need to be further optimized via material morphology/microstructure/composition regulation and doping/composite engineering. Pseudocapacitive electrode materials with superior electronic conductivity, excellent cyclic stability, and high capacity are also of great significance for the large-scale practical application of CDI-based saline purification techniques, but challenges still exist.…”

Submicron Ti2CTxMXene particulates as high-rate intercalation anode materials for Li-ion batteries

“…So far, there have been a few studies regarding the molten salt synthesis of Ti 2 AlC or other MAX phases. [40][41][42][43][44] Moreover, the reaction mechanism still remains unclear. Consequently, the formation mechanism of the Ti 2 AlC MAX phase in molten salt is deeply investigated in this study.…”

In situ preparation of an anatase/rutile-TiO2/Ti3C2Tx hybrid electrode for durable sodium ion batteries

“…4a , all plots exhibit similar shapes composed of a straight line in the low frequency area and a semicircle in the high frequency range. 49 The equivalent circuit is given in the inset, where R s , R ct and W 0 represent the electrolyte resistance, the interfacial charge transfer resistance and the Warburg impedance related to the Na + diffusion within the electrode. 50 As shown in Table 1 , R ct significantly decreases when TiO 2 is incorporated in Ti 3 C 2 T x regardless of the crystal type.…”