Improved charge storage performance of a layered Mo1.33C MXene/MoS2/graphene nanocomposite

Abstract

The construction of nanocomposite electrodes based on 2D materials is an efficient route for property enrichment and for exploitation of constituent 2D materials. Herein, a flexible Mo_1.33C i-MXene/MoS₂/graphene (MOMG) composite electrode is constructed, utilizing an environment-friendly method for high-quality graphene and MoS₂ synthesis. The presence of graphene and MoS₂ between MXene sheets limits the commonly observed restacking, increases the interlayer spacing, and facilitates the ionic and electronic conduction. The as-prepared MOMG electrode delivers a volumetric capacitance of 1600 F cm⁻³ (450 F g⁻¹) at the scan rate of 2 mV s⁻¹ and retains 96% of the initial capacitance after 15 000 charge/discharge cycles (10 A g⁻¹). The current work demonstrates that the construction of nanocomposite electrodes is a promising route towards property enhancement for energy storage applications.