1. Polypyrrole-encapsulated vanadium pentoxide nanowires on a conductive substrate for electrode in aqueous rechargeable lithium battery.
- Author
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Liang C, Fang D, Cao Y, Li G, Luo Z, Zhou Q, Xiong C, and Xu W
- Subjects
- Capsules, Electrodes, Microscopy, Electron, Scanning, Electric Power Supplies, Lithium chemistry, Nanowires chemistry, Polymers chemistry, Pyrroles chemistry, Vanadium Compounds chemistry, Water chemistry
- Abstract
Precursors of ammonium vanadium bronze (NH4V4O10) nanowires assembled on a conductive substrate were prepared by a hydrothermal method. After calcination at 360°C, the NH4V4O10 precursor transformed to vanadium pentoxide (V2O5) nanowires, which presented a high initial capacity of 135.0mA h g(-1) at a current density of 50mA g(-1) in 5M LiNO3 aqueous solution; while the specific capacity faded quickly over 50 cycles. By coating the surface of V2O5 nanowires with water-insoluble polypyrrole (PPy), the formed nanocomposite electrode exhibited a specific discharge capacity of 89.9mA h g(-1) at 50mA g(-1) (after 100 cycles). A V2O5@PPy //LiMn2O4 rechargeable lithium battery exhibited an initial discharge capacity of 95.2mA h g(-1); and after 100 cycles, a specific discharge capacity of 81.5mA h g(-1) could retain at 100mA g(-1)., (Copyright © 2014 Elsevier Inc. All rights reserved.)
- Published
- 2015
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