CuV2O6 nanowires were prepared via a simple hydrothermal route using NH4VO3 and Cu（NO3）2 as starting materials. The structures and electrochemical properties of CuV2O6 nanowires were characterized by means of X-ray...CuV2O6 nanowires were prepared via a simple hydrothermal route using NH4VO3 and Cu（NO3）2 as starting materials. The structures and electrochemical properties of CuV2O6 nanowires were characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM）. The results show that the CuV2O6 nanowires are about 100 nm in width and single crystalline grown along [001] direction. CuV2O6 nanowires delivered a high initial discharge capacity of 435 and 351 mA·h/g at current densities of 50 and 100 mA·h/g, respectively. The electrochemical kinetics of the CuV2O6 nanowires was also investigated by means of electrochemical impedance spectroscopy（EIS） and the poor rate performance was observed, which may be attributed to the low ion diffusion coefficient of the CuV2O6 nanowires.展开更多
Zn2＋ ions doped quasi-one-dimensional spin-chain materials LiCul-xZnxVO4（x=0, 0.1, 0.2） were prepared by solid-state reaction and the effect of nonmagnetic Zn2＋ ions on the crystal structure, valence state and mag...Zn2＋ ions doped quasi-one-dimensional spin-chain materials LiCul-xZnxVO4（x=0, 0.1, 0.2） were prepared by solid-state reaction and the effect of nonmagnetic Zn2＋ ions on the crystal structure, valence state and magnetic proper- ties of them were studied by X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS） and dc magnetization. The elongation of a and b axes and the shrinkage of c axis indicate a reduced effect of the Jahn-Teller distortion after Zn2＋ ions doping, while the valence state of transition metal ions in LiCu1- xZnrVO4 remains unchanged since the equi- valence doping of Zn2＋ ions on the Cu2＋ sites. The corrected Bonner-Fisher equation fitting to the susceptibility indicates that isolated dimers and spins are created along with the departure from infinite spin chains to finite ones.展开更多
基金Supported by the National Basic Research Program of China（No.2015CB251103）, the National Natural Science Foundation of China（No. 51472104） and the Development Program of Science and Technology of Jilin Province, China（No.20140101093 JC）.
文摘CuV2O6 nanowires were prepared via a simple hydrothermal route using NH4VO3 and Cu（NO3）2 as starting materials. The structures and electrochemical properties of CuV2O6 nanowires were characterized by means of X-ray diffraction（XRD）, scanning electron microscopy（SEM） and transmission electron microscopy（TEM）. The results show that the CuV2O6 nanowires are about 100 nm in width and single crystalline grown along [001] direction. CuV2O6 nanowires delivered a high initial discharge capacity of 435 and 351 mA·h/g at current densities of 50 and 100 mA·h/g, respectively. The electrochemical kinetics of the CuV2O6 nanowires was also investigated by means of electrochemical impedance spectroscopy（EIS） and the poor rate performance was observed, which may be attributed to the low ion diffusion coefficient of the CuV2O6 nanowires.
文摘Zn2＋ ions doped quasi-one-dimensional spin-chain materials LiCul-xZnxVO4（x=0, 0.1, 0.2） were prepared by solid-state reaction and the effect of nonmagnetic Zn2＋ ions on the crystal structure, valence state and magnetic proper- ties of them were studied by X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS） and dc magnetization. The elongation of a and b axes and the shrinkage of c axis indicate a reduced effect of the Jahn-Teller distortion after Zn2＋ ions doping, while the valence state of transition metal ions in LiCu1- xZnrVO4 remains unchanged since the equi- valence doping of Zn2＋ ions on the Cu2＋ sites. The corrected Bonner-Fisher equation fitting to the susceptibility indicates that isolated dimers and spins are created along with the departure from infinite spin chains to finite ones.
