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

A facile strategy was developed to prepare interlayer-expanded MoS2/graphene composites through a one-step hydrothermal reaction method. MoS2 nanosheets with several-layer thickness were observed to uniformly grow on the surface of graphene sheets. And the interlayer spacing of MoS2 in the composites was determined to expand to 0.95 nm by ammonium ions intercalation. The MoS2/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.