Solvothermal Synthesis And Electrchemical Properties Of Nano Vanadium Oxides

Based on detailed investigation of a great deal of related literature,the structure, property,synthetic method and application of nano vanadium oxides have been reviewed.We fabricated ordered vanadium oxides and acquired nano-rods,nano-wires of vanadium dioxide and other vanadium oxides,honey-comb structure and nanorods-array of vanadium dioxide with solvothermal method.The phases, morphologies and thermal stability of the products were characterized by XRD,TEM, SEM,DSC,XPS,etc.B phase vanadium dioxide was synthesized via solvothermal method with n-butanol, hexanol as reducing agents.The influences of temperature and reaction time on the product were discussed.Vanadium oxides were synthesized via solvothermal method with multi-hydroxyl-amine and imidazole as reducing agents.Nano-clusters of VO₂(B) were obtained by doping manganese ions and nickel ions and nano-rods array and honeycomb structure were obtained by the aidance of electrostatic field and antigravity growth,respectively.Temperature and reducing agent play key role in forming nanorods.Unitary alcohols,used both as templates and as reducing agents,can avail to control the morphology of the products and furter to form nano-rods and nano-wires.The properties of samples were tested as material of electricity storage and the materials showed good electrochemical performance:The highest specific capacity of nano-rods array reached 520 mAh/g.With the dop of 2%Mn,the value of specific capacities of the products increased by 13%and the maximum reached 586.3 mAh/g. Meanwhile,nano-wires of VO₂(B)synthesized via hydrothermal showed the specific capacitance of 336 F/g.