Interconnected MoS2 on 2D Graphdiyne for Reversible Sodium Storage

In this study, graphdiyne (GDY) was first reported as a substrate material for sodium-ion batteries (SIBs). The creative hybridization of GDY and molybdenum disulfide (MoS 2 ) endows the composite with unique heterostructural and morphological advantages that boost the charge transport rate and enhance the battery discharge properties. Electrochemical results indicated that the MoS 2 @GDY anode displays a considerable discharge capacity of up to 328 mAh g –1 at 1000 mA g –1 . A capacity retention of 93% even at testing current back to 200 mA g –1 suggests superior rate characteristics. An outstanding stable cyclic performance of 217 mAh g –1 is obtained at a high testing density. The attractive results not only demonstrate that GDY could be used not only as an effective conductive substrate to prevent the host material from agglomerating in the electrochemical process but also provide a novel design for fabricating efficient electrode materials for future energy-storage systems.