Interconnected Si-coated NiO nanosheet arrays with enhanced electrochemical performance for lithium-ion batteries

NiO/Si composite film is prepared by chemical bath deposition and magnetron sputtering techniques. The sample is characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The film is constructed by interconnected Si-coated NiO nanosheet arrays. As an anode material for lithium-ion batteries, the film is analyzed by galvanostatic discharge-charge and cyclic voltammetry (CV). NiO/Si nanosheet arrays deliver higher capacity than that of NiO nanosheet arrays, and shows better cycling stability that of Si film. The enhanced electrochemical performance is ascribed to the interconnected Si-coated NiO nanosheet array structure.