Synthesis of nano-TiO2-decorated MoS2 nanosheets for lithium ion batteries

Abstract

A facile process is developed to synthesize a TiO₂–MoS₂ nanohybrid via a one-pot hydrothermal route and post-annealing in an Ar atmosphere at 500 °C for 4 h. The precursor and target products were characterized by transmission electron microscopy (TEM) and field-emission scanning electron microscopy (FESEM). TEM and FESEM analysis showed that TiO₂ nanoparticles with an average diameter of about 20 nm were uniformly distributed on MoS₂ nanosheets. Electrochemical measurements demonstrated that the nano-TiO₂-decorated MoS₂ nanosheets exhibited excellent cycling stability and rate performance, which delivered a capacity of 604 mA h g⁻¹ after 100 cycles at a current density of 100 mA g⁻¹. The TiO₂ is believed to act as a stabilizer to retain the MoS₂ structure upon prolonged cycling. This material can be a promising candidate for the lithium ion batteries (LIBs).