Performance of a Novel 3D Graphene-WS2 Hybrid Structure for Sodium-Ion Batteries

Three dimensional (3D) heterostructure materials display proper energy storage performance and high electric conductivity. In this work, the application of 3D graphene sheets and zigzag WS2 nanoribbon (3DGW) hybrid structures as anode materials for sodium-ion batteries is studied on the basis of first-principle calculations. Compared with related single-layer nanosheets and nanoribbon hybrid components, 3DGW heterostructures show an enhanced Na adsorption interaction and good electrical conductivity, which competes with popular electrode materials for sodium-ion batteries. The activation barrier for Na diffusion in 3DGW hybrid structures is lower than in two dimensional hybrid components, which can expect higher cycling rates. Our results present the performance of a new 3D material for next-generation sodium-ion electrode materials and provide proper insight into exploring high-capacity 3D heterostructure materials for battery applications.