N-doped graphene encapsulated MoS 2 nanosphere composite as a high-performance anode for lithium-ion batteries

MoS is widely used in lithium-ion batteries (LIBs) due to its high capacity (670 mAh g ) and unique two-dimensional structure. However, the further application was limited of MoS as anode materials suffer from its volume expansion and low conductivity. In this work, N-doped graphene encapsulated MoS nanosphere composite (MoS @NG) were prepared and its unique sandwich structure containing abundant mesopores and defects can efficiently enhance reaction kinetics. The MoS @NG electrode shows a reversible capacity of 975.9 mAh g at 0.1 A g after 100 cycles, and a reversible capacity of 325.2 mAh g is still maintained after 300 cycles at 5 A g . In addition, the MoS @NG electrode exhibites an excellent rate performance benefiting from the electrochemical properties dominated by capacitive behavior. This suggests that MoS @NG composite can be used as potential anode materials for LIBs.