Key Words:Nanomaterials; Electrical Properties; V(2)O(5)center dot xH(2)O; Lithium Batteries

Abstract:Cu doped V(2)O(5)center dot xH(2)O nanostructures have been synthesized by the reaction between peroxovanadic acid and copper acetic under hydrothermal conditions without the aid of any template and surfactant. The morphologies of Cu doped V(2)O(5)center dot xH(2)O nanostructures can be adjusted by controlling the molar ratio of Cu and V in the reagents. As the concentration of copper acetic increases, nanobelts can be changed into urchin-like nanostructures composed of radially aligned nanorods, which can be an important candidate of cathode materials for lithium batteries. The electrochemical test shows that discharge specific capacity of Cu doped V(2)O(5)center dot xH(2)O nanostructures is related to the Cu content. Cu doped V(2)O(5)center dot xH(2)O nanostructures with Cu/V molar ratio of 0.65 exhibit an initial high discharge specific capacity of 290 mAhg(-1) in the potential range of 1.5-3.8 V and the capacity remains 150 mAhg(-1) after 20 cycles.

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