Interlayer-expanded MoS2/graphene composites as anode materials for high-performance lithium-ion batteries

A facile strategy was developed to prepare interlayer-expanded MoS 2 /graphene composites through a one-step hydrothermal reaction method. MoS 2 nanosheets with several-layer thickness were observed to uniformly grow on the surface of graphene sheets. And the interlayer spacing of MoS 2 in the composites was determined to expand to 0.95 nm by ammonium ions intercalation. The MoS 2 /graphene composites show excellent lithium storage performance as anode materials for Li-ion batteries. Through gathering advantages including expanded interlayers, several-layer thickness, and composited graphene, the composites exhibit reversible capacity of 1030.6 mAh g −1 at the current density of 100 mA g −1 and still retain a high specific capacity of 725.7 mAh g −1 at a higher current density of 1000 mA g −1 after 50 cycles.