One-step synthesis of micro/nano flower-like Ni3V2O8 as anode for Li-ion batteries

A micro/nano flower-like Ni3V2O8 superstructure composed of uniform two-dimensional (2D) nanoplates with thicknesses of 20-50 nm had been successfully synthesized using a facile one-step hydrothermal approach. It was found that the pH value of the mixed precursor solutions played a key role in the formation of flower-like Ni3V2O8 structure. Importantly, the flower-like Ni3V2O8 exhibited a high reversible capacity, good cycling stability (1047.8 mA h g(-1) at 200 mA g(-1) after 300 cycles), and superior fate capability (640.8 mA h g(-1) at 3200 mA g(-1)) as an anode material for Li-ion batteries. Furthermore, the lithium storage mechanism of Ni3V2O8 involving in a conversion reaction and an intercalation reaction was proposed by ex situ XRD analyses.