Solvothermal Synthesis of a Molybdenum Disulfide/Reduced Porous Graphene Oxide Nanocomposite as a High‐Performance Anode Material for Lithium‐Ion Batteries

Abstract

Although molybdenum disulfide (MoS2) has a higher theoretical capacity than graphite as an anode material for lithium‐ion batteries, its intrinsically poor electrical and ionic conductivity decrease its rate properties and lithium‐storage capacity. In this work, we prepared a MoS2/reduced porous graphene oxide (rPGO) composite by the solvothermal method to complement the conductivity and to improve the lithium‐storage properties of MoS2. PGO was synthesized by a convenient, low‐costing, and mass‐producible nitric acid treatment method. Owing to its large surface area and porous structure, the MoS2/rPGO sample exhibited improved capacity and cyclic stability over other MoS2/reduced graphene oxide (rGO) and MoS2 nanoparticle samples. After 100 cycles, the MoS2/rPGO electrode showed an improved capacity of 932 mAh g−1, whereas the capacity of the MoS2/rGO electrode was 395 mAh g−1 at a current density of 200 mA g−1.