Effect of carbon sources on morphologies and electrochemical properties of MoS2/carbon composites

Molybdenum disulfide/reduced graphene oxide-carbon (MoS2/RGO-C) and molybdenum disulfide/reduced graphene oxide (MoS2/RGO) composites are synthesized using graphene oxide and glucose as carbon sources, and effects of carbon sources on morphologies and electrochemical properties of MoS2/carbon composites are studied in detail by comparing the materials with pristine MoS2. It demonstrates that after addition of glucose during the synthesis process, MoS2/RGO-C particles grow up due to coating of amorphous carbon on surface, and the coated carbon restrains nanosheet growth of MoS2 crystals. Electrochemical results indicate that incorporation of the reduced graphene oxide and interconnected conductive carbon network improve cycling stability of the MoS2/RGO-C composites, and a capacity retention of 80.5% is obtained after 250 charge/discharge cycles.