MoSe2 nanosheets anchored on Ti3C2 MXene hybrid nanostructure for boosting electrochemical performance of supercapacitor

Abstract

The significant advancements in supercapacitor technology promote the hunt for developing innovative electrode materials with enhanced electrochemical properties. This study delves into the comprehensive study of expanded MXene layers (e-Ti₃C₂T_x) decorated with flower-like MoSe₂ nanosheets (MoSe₂/e-Ti₃C₂T_x) with a straightforward hydrothermal method by optimizing synthesis parameters (HF%, hydrothermal reaction time). XRD, FESEM, and XPS results revealed that MoSe₂ nanosheets are successfully anchored on MXene layers and developed strong interstitial contact. The electrochemical analysis demonstrated significant enhanced energy storage capacity along with promising cycle life for heterojunction MoSe₂/e-Ti₃C₂T_x hybrid nanostructured electrode. The MoSe₂/e-Ti₃C₂T_x hybrid nanostructured electrode delivered a specific capacity of 259 C g⁻¹ at a current density of 0.5 A g⁻¹, whereas MoSe₂ delivered only 184 C g⁻¹. In particular, hybrid nanostructure electrodes exhibited excellent cycle life (96.6 % after 5000 cycles). Moreover, the supercapacitor device assembled with the MoSe₂/e-Ti₃C₂T_x hybrid nanostructure delivered a maximum energy density of 12.92 Wh kg⁻¹ with power density of 1001.02 W kg⁻¹,and retained 80 % of it's capacity after 5000 cycles at 8 A g⁻¹. The enhanced properties of MoSe₂/e-Ti₃C₂T_x hybrid nanostructure clearly reveals its promising application for the advanced supercapacitor.