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

A solvent-free, low-cost, high-yield and scalable single-step ball milling process is developed to construct 2D MoS ₂ /graphene hybrid electrodes for lithium-ion batteries. Electron microscopy investigation reveals that the obtained hybrid electrodes consist of numerous nanosheets of MoS ₂ and graphene which are randomly distributed. The MoS ₂ /graphene hybrid anodes exhibit excellent cycling stability with high reversible capacities (442 mA h g ^-1 for MoS ₂ /graphene (40 h); 553 mA h g ^-1 for MoS ₂ /graphene (20 h); 342 mA h g ^-1 for MoS ₂ /graphene (10 h)) at a high current rate of 250 mA g ^-1 after 100 cycles, whereas the pristine MoS ₂ 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 MoS ₂ has an extraordinary effect on its electrochemical performance. This work emphasises the importance of the construction of the 2D MoS ₂ /graphene hybrid structure to prevent capacity fading issues with the MoS ₂ anode in lithium-ion batteries.
Competing Interests: There are no conflicts to declare.
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