Fabrication of defect-rich MoS2 ultrathin nanosheets for application in lithium-ion batteries and supercapacitors†
Defect-rich MoS2 ultrathin nanosheets with abundant unsaturated sulfur atoms are constructed using a stoichiometric ratio of Mo(VI) and L-cysteine in the presence of 1,6-hexanediamine. The as-prepared MoS2 ultrathin nanosheets exhibit excellent electrochemical activities in lithium-ion batteries and supercapacitors with a high reversible capacity and good cycling stability. The construction of defects with abundant unsaturated sulfur atoms in the MoS2 ultrathin nanosheets provided active sites for improving the electrochemical performance in lithium-ion batteries and supercapacitors. This work provides an accessible foundation for engineering more sophisticated defect-rich MoS2 ultrathin nanosheet-based composites for further optimization across a range of possible domains of application.