Fabrication of polypyrrole/vanadium oxide nanotube composite with enhanced electrochemical performance as cathode in rechargeable batteries

作者：Zhou, Xiaowei^*; Chen, Xu; He, Taoling; Bi, Qinsong; Sun, Li; Liu, Zhu^*

来源：Applied Surface Science, 2017, 405: 146-151.

DOI：10.1016/j.apsusc.2017.02.050

• Vanadium oxide nanotube
• Polypyrrole
• Nanotechnology
• Electrochemical performance

Vanadium oxide nanotubes (VOxNTs) with hollow as well as multi-walled features were fabricated under hydrothermal condition by soft-template method. This novel VOxNTs can be used as cathode material for lithium ion batteries (LIBs), but displaying low specific capacity and poor cycling performance owing to the residual of a mass of soft-template (C12H27N) and intrinsic low conductivity of VOx. Cation exchange technique and oxidative polymerization process of pyrrole monomers were conducted to wipe off partial soft-template without electrochemical activity within VOxNTs and simultaneously form polypyrrole coating on VOxNTs, respectively. The resulting polypyrrole/VOxNTs nanocomposite delivers much improved capacity and cyclic stability. Further optimizations, such as complete elimination of organic template and enhancing the crystallinity, can make this unique nanostructure a promising cathode for LIBs.

• 出版日期2017-5-31
• 单位云南大学