Nanostructured vanadium oxide electrodes for enhanced lithium-ion intercalation

作者：Wang Ying^*; Takahashi Katsunori; Lee Kyoungho; Cao Guozhong

来源：Advanced Functional Materials, 2006, 16(9): 1133-1144.

DOI：10.1002/adfm.200500662

• Lithium-ion intercalation
• Vanadium oxide
• Vanadium pentoxide

This article summarizes our most recent studies on improved Li +-intercalation properties in vanadium oxides by engineering the nanostructure and interlayer structure. The intercalation capacity and rate are enhanced by almost two orders of magnitude with appropriately fabricated nanostructures. Processing methods for single-crystal V2O5nanorod arrays, V2O5&middotn H2O nanotube arrays, and Ni/V2O5&middotn H2O core/shell nanocable arrays are presented;the morphologies, structures, and growth mechanisms of these nanostructures are discussed. Electrochemical analysis demonstrates that the intercalation properties of all three types of nanostructure exhibit significantly enhanced storage capacity and rate performance compared to the film electrode of vanadium pentoxide. Addition of TiO2to orthorhombic V2O5is found to affect the crystallinity, microstructure, and possible interaction force between adjacent layers in V2O5, and subsequently leads to enhanced Li+-intercalation properties in V2O5. The amount of water intercalated in V2O5is found to have a significant influence on the interlayer spacing and electrochemical performance of V2O5&middotn H2O. A systematic electrochemical study has demonstrated that the V2O 5&middot0.3 H2O film has the optimal water content and exhibits the best Li+-intercalation performance.

• 出版日期2006
• 单位Soonchunhyang University