In situ production of a two-dimensional molybdenum disulfide/graphene hybrid nanosheet anode for lithium-ion batteries

摘要

A solvent-free, low-cost, high-yield and scalable single-step ball milling process is developed to construct 2D MoS2/graphene hybrid electrodes for lithium-ion batteries. Electron microscopy investigation reveals that the obtained hybrid electrodes consist of numerous nanosheets of MoS2 and graphene which are randomly distributed. The MoS2/graphene hybrid anodes exhibit excellent cycling stability with high reversible capacities (442 mA h g(-1) for MoS2/graphene (40 h); 553 mA h g(-1) for MoS2/graphene (20 h); 342 mA h g(-1) for MoS2/graphene (10 h)) at a high current rate of 250 mA g(-1) after 100 cycles, whereas the pristine MoS2 electrode shows huge capacity fading with a retention of 37 mA h g(-1) at 250 mA g(-1) current after 100 cycles. The incorporation of graphene into MoS2 has an extraordinary effect on its electrochemical performance. This work emphasises the importance of the construction of the 2D MoS2/graphene hybrid structure to prevent capacity fading issues with the MoS2 anode in lithium-ion batteries.