Reduced graphene oxide supported Ni-doped MoS2 nanosheets with enhanced lithium-ion storage performance

Rechargeable LIBs have been playing the dominant role in the market of consumer electronics, electric vehicles, and grid storage. At present, graphite, as a traditional anode material, cannot meet the requirements of high-energy-density LIBs due to its low theoretical specific capacity (372 mAh g⁻¹). Here, we report Ni-MoS₂/rGO composites synthesized by a ligand-assisted hydrothermal method, in which curled Ni-doped MoS₂ nanosheets (Ni-MoS₂) grown on reduced graphene oxide (rGO) had a loose thin-layered microstructure with high electrochemical activities, ensuring excellent lithium-ion storage performance of the composites. Benefitting from high electrochemical activities of the Ni-MoS₂ and high conductivity of the rGO, the Ni-MoS₂/rGO composites exhibited high reversible capacitance and fast reaction kinetics. As a result, a high capacity of reversible lithium-ion storage up to 995 mAh g⁻¹ (after 100 cycles) and a good rate capability were achieved by the Ni-MoS₂/rGO composites.