Nanocarved MoS₂-MoO₂ Hybrids Fabricated Using in Situ Grown MoS₂ as Nanomasks

The morphology and hybridization of nanostructures are crucial to achieve properties for various applications. An in situ grown three-dimensional (3D) MoS₂ nanomask has been adopted to control the morphology and hybridization of molybdenum compounds. The in situ generated MoS₂ mask on MoO₃ nanobelt surfaces allowed us to fabricate a 3D c-MoO₂@MoS₂ hybrid nanostructure, in which c-MoO₂ is a carved MoO₂ nanobelt with a well-distributed hole pattern. The nanomasks have been controlled by adjusting the alignments of MoS₂. The exposed MoO₂ surfaces of c-MoO₂@MoS₂ were further sulfurated to give cw-MoO₂@MoS₂, in which all surfaces of MoO₂ are wrapped by a few layers of MoS₂. The structure synergistically enhanced the electrochemical performances of MoO₂ and MoS₂, especially at high current rates. Reversible capacities of 1418 and 295 mAh/g after 115 and 300 cycles still remained for the cw-MoO₂@MoS₂ anodes at current rates of 1 and 10 A/g, respectively.