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α’-NaV2O5 was prepared by a simple hydrothermal process.X-ray diffraction confirmed the orthorhombic structure of α’-NaV2O5,with preferential growth along the (001) direction.Scanning electron microscopy showed α’-NaV2O5 was composed of flake-shaped crystals.X-ray photoelectron spectroscopy confirmed the co-existence of V4+ and V5+ in α’-NaV2O5,which results in an average V4.5+ oxidation state of α’-NaV2O5.The observed Raman bands are ascribed to different V―O vibrations.α’-NaV2O5 shows a reversible specific capacity of about 100 mA·h·g-1 between 3.5 and 1.0 V,with a good capacity retention.The good electrochemical stability of the material is attributed to its structural stability during Li+ intercalation.
α’-NaV2O5 was prepared by a simple hydrothermal process. X-ray diffraction confirmed the orthorhombic structure of α’-NaV2O5, with preferential growth along the (001) direction. Scanning electron microscopy showed α’-NaV2O5 was composed of flake-shaped crystals.X-ray photoelectron spectroscopy confirmed the co-existence of V4 + and V5 + in α’-NaV2O5, which results in an average V4.5 + oxidation state of α’-NaV2O5. The observed Raman bands are ascribed to different V-O vibrations.α’-NaV2O5 shows a reversible specific capacity of about 100 mA · h · g-1 between 3.5 and 1.0 V, with a good capacity retention. The good electrochemical stability of the material is attributed to its structural stability during Li + intercalation.