Supramolecule-mediated synthesis of MoS2/reduced graphene oxide composites with enhanced electrochemical performance for reversible lithium storage

Abstract

MoS₂/reduced graphene oxide (MoS₂/rGO) composites are fabricated through a facile supramolecule-mediated hydrothermal route. The effects of the supramolecule (pillar[5]arene) on the microstructure and electrochemical lithium storage performance of the MoS₂/rGO composites are investigated. It is found that the MoS₂/rGO composites display a wrinkled thin flaky appearance, in which there are a lot of irregular pores and apertures. Few-layer MoS₂ sheets are well dispersed and anchored on the rGO surface. When evaluated as a host material for lithium storage, the MoS₂/rGO composite exhibits a much higher specific capacity of 1050–1140 mA h g⁻¹ with excellent cyclic performance and a significantly enhanced high-rate capability of 815–875 mA h g⁻¹ at a current density of 1000 mA g⁻¹ in comparison with the pristine MoS₂. The improved performance can be ascribed to the robust composite structure and the better synergic effects between few-layer MoS₂ and rGO sheets.