Conductive two-dimensional titanium carbide ‘clay’ with high volumetric capacitance

Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films

Since the discovery of graphene, the quest for two-dimensional (2D) materials has intensified greatly. Recently, a new family of 2D transition metal carbides and carbonitrides (MXenes) was discovered that is both conducting and hydrophilic, an uncommon combination. To date MXenes have been produced as powders, flakes, and colloidal solutions. Herein, we report on the fabrication of ∼1 × 1 cm2 T...

Anisotropic electronic conduction in stacked two-dimensional titanium carbide

Stacked two-dimensional titanium carbide is an emerging conductive material for electrochemical energy storage which requires an understanding of the intrinsic electronic conduction. Here we report the electronic conduction properties of stacked Ti3C2T2 (T = OH, O, F) with two distinct stacking sequences (Bernal and simple hexagonal). On the basis of first-principles calculations and energy ban...

Interlayer coupling in two-dimensional titanium carbide MXenes.

Success in the exfoliation of the stacked T-functionalized titanium carbide MXenes Tin+1CnT2 (T = OH, O, and F) would potentially extend their application scope, which requires an understanding of the nature of interlayer coupling. Here, we report for the first time the intrinsic interlayer coupling in pristine MXenes on the basis of first-principles calculations by taking long-range interactio...

Probing the Mechanism of High Capacitance in 2D Titanium Carbide Using In Situ XRay Absorption Spectroscopy

(comparable only with hydrated RuO 2 ) was measured for Ti 3 C 2 T x in aqueous electrolytes. [ 11,14 ] Our previous studies revealed that spontaneous intercalation of some cations takes place when MXene samples are exposed to aqueous electrolytes. [ 6 ] In situ X-ray diffraction showed that variations of the distance between the Ti 3 C 2 T x layers (which is proportional to the c lattice param...

High capacitance of surface-modified 2D titanium carbide in acidic electrolyte