Hierarchical architecture of the metallic VTe₂/Ti₃C₂T_x MXene heterostructure for supercapacitor applications

Abstract

Layered two dimensional (2D) materials demonstrate exceptional performance as supercapacitor electrodes due to their unique intrinsic properties. A hybrid 2D/2D heterostructured electrode material can synergize the individual energy storage features...

A hollow nano-flower NiCo2O4@Nb2CTx MXene heterostructure via interfacial engineering for high-performance flexible supercapacitor electrodes

“…6a, indicating that the NiCo 2 O 4 @Nb 2 CTx composite is a typical battery-type electrode material. Here, the pair of sensitive and symmetrical redox peaks at ∼0.38 V of the anodic peak and 0.49 V of the cathodic peak stems from the reversible faradaic redox reactions mainly related to the conversion reactions of coupled Co 3+ /Co 2+ and Ni 3+ /Ni 2+ for NiCo 2 O 4 in a basic environment according to the following reactions: 53,54 NiCo 2 O 4 + OH − + H 2 O ↔ NiOOH + 2CoOOH + e − ,CoOOH + OH − ↔ CoO 2 + H 2 O + e − .…”

Ti3C2Tx MXene reinforcement: a nickel–vanadium selenide/MXene based multi-component composite as a battery-type electrode for supercapacitor applications

“…6(b)). 52 Second pair of peaks with binding energies at 521.9 and 514.3 eV correspond to V 5+ . 53 The deconvoluted spectra of Ni 2p and V 2p show the existence of Ni 3+ and V 5+ which originated from the surface oxides formed during the hydrothermal synthesis.…”

Improved Charge Storage Capacity of Supercapacitor Electrodes by Engineering Surfaces: The Case of Janus MXenes

“…Flexibility in the composition makes MXenes suitable for the further exploration of enhanced functionalities by tweaking their compositions and structures. Subsequently, experiments have been performed on synthesized new MXenes, − heterostructured − and doped − Ti 3 C 2 T x , solid solutions, and ordered phases with varieties of compositions. − Improved electrochemical performances of supercapacitors in most of these cases, therefore, call for further investigations into the electrochemical properties of MXene-based supercapacitors by manipulating the compositions.…”