Graphene enwrapped molybdenum disulfide for long life rechargeable batteries

Abstract

MoS 2 nanoclusters/graphene composite (MoS 2 /GNs) was prepared by one-step hydrothermal strategy in which MoS 2 nanoclusters were enwrapped by graphene nanosheets. MoS 2 /GNs electrode delivered discharge/charge capacities of 890 and 885 mA · h/g at 0.2 °C (200 mA g –1 ) after 300 cycles, as rechargeable Li ion batteries (LIBs) anode material, corresponding to a reversible charge capacity retention of up to 73.0%. When the current was adjusted to 5 C (5000 mA g –1 ), the material could still deliver discharge/charge capacities of 612 and 591 mA · h/g. The synergistic effects between MoS 2 and graphene contributed to excellent electrochemical performance, which efficiently improved its electrical conductivity, and concurrently inhibited volume change of the MoS 2 in the electrode.