Building hybrid structure of monolayered S-depleted Mo–S nanocrystals and 3D graphene towards promising aqueous supercapacitor applications

Abstract Two-dimensional (2D) 1H molybdenum disulfide (1H-MoS 2 ) is hard to be directly used in energy storage devices due to its inert basal plane and unfavorable 2D stacking. This work demonstrated how the basal plane of 1H MoS 2 nanocrystals (NCs) can be activated to offer doubled specific capacitance by simple surface S depletions. Building on the expanded graphene with three-dimensional (3D) structures, as-prepared NCs were chemically grafted on the graphene surface to deliver stable energy storage and high capacitance, which overcame above challenges of 1H-MoS 2 . Aside from the mostly focused metastable phase, this work confirmed that the stable 1H Mo–S material is also promising in energy storage applications.